[RE-wrenches] Hawaii projects
Hi wrenches, i spoke with someone in Hawaii awhile back and i can’t find my notes or the email. I have a couple of projects on kauai coming up and need to speak with an installer over there. Thanks, Max Balchowsky SEE Systems 760-403-6810 ___ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
Re: [RE-wrenches] Sol-Ark 15k Conduit Entries
i like using gutters, it keeps it clean you can just as easily put the gutter vertical on the side and use close nipples….. Max Balchowsky SEE Systems On Wed, Aug 2, 2023 at 8:04 AM Jason Szumlanski via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > I see a lot of pictures with conduit nipples coming out of a gutter that > are fairly long. I have a height limit issue and I'm wondering if there are > any negative implications of using very short nipples between a wireway > below and the inverter. I'm thinking about using close nipples or perhaps > 2-in nipples if I have enough room. > > If there are any practical reasons that this will not work well, please > let me know. > > Jason Szumlanski > Florida Solar Design Group > ___ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > > ___ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
Re: [RE-wrenches] HOA’s in Southern California
Hello all, I don’t post much anymore but I’m in the process of installing a small (6.4) kw system on my condo, I started putting it in and went to the city for a permit but the city told me they can’t give me a permit without HOA approval. I’m well within the parameters I know they require, but I didn’t get their permission. The way I read the more recent Solar Access Laws there is no grounds for this. Does anyone have any recent experience with this? Max Balchowsky SEE Systems Newport Beach Ca 92683 760-403-6810 ___ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
Re: [RE-wrenches] Dealing with HOAs.
Ck the current “solar access” laws, I haven’t felt with that in years, but when we did a lot of residential solar there were laws, at least in California that prohibited HOA’s from doing that. On Fri, Mar 29, 2019 at 10:20 AM Kevin Eigel wrote: > We have a customer whose HOA is disapproving his plans to install all > black panels on the front (south facing) roof of his house. Does anyone > have any suggestions about getting this project through. In my opinion, > HOAs should not be able to stop a solar project. > > Kevin Eigel > Ecohouse Solar > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Ibew is working to exclude C-46 contractor’s from installing Batteries.
License Bond is now 15K Max Balchowsky Solar Electric Energy Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 C-10 422405 760-403-6810 "Building a Better Future For The Next Generation" > On Mar 26, 2018, at 5:01 PM, James Rudolph <jamesrudolp...@gmail.com> wrote: > > Aloha All, > Does anybody know the requirements for the C-46? I would assume if you could > qualify for that ( C-46) you could also qualify for a C-10 (C-13 Hawaii). > The full license gives one the ability to do anything, and this seems like > the way to go for versatility. "If you can't beat'em...join them." > > C-10 - Electrical Contractor > > An electrical contractor places, installs, erects or connects any electrical > wires, fixtures, appliances, apparatus, raceways, conduits, solar > photovoltaic cells or any part thereof, which generate, transmit, transform > or utilize electrical energy in any form or for any purpose. > > What is needed to qualify: > > Applicants are required to have 4 years’ experience to qualify to take the > exam. Experience must be at the journeyman, foreman or supervisor, > contractor, or as an owner-builder. > > All applicants must have a working capital of at least $2,500. In addition, > all applicants must also file a bond with the Registrar in the amount of > $10,000. > > > C-46 - Solar Contractor > > A solar contractor installs, modifies, maintains, and repairs thermal and > photovoltaic solar energy systems. A licensee classified in this section > shall not undertake or perform building or construction trades, crafts, or > skills, except when required to install a thermal or photovoltaic solar > energy system. > > > > > James B. Rudolph > Hawaii Unifed > Director of Energy > ES Electrician # 10816 > NABCEP Certified PV Installer # 091209-1 > > > > > > > On Fri, Mar 23, 2018 at 3:02 PM, Jason Andrade > <ja...@westcoastsustainables.com <mailto:ja...@westcoastsustainables.com>> > wrote: > Hi at this point I believe this is a California only issue, but I was > contacted by CalSeia today and was asked to be involved in a discussion > regarding a move where only a C-10 contractor can install a battery based > system > This was news to me but they sent me a pdf outlining the issue and I will > read it over this weekend has anyone else heard about this? > My instant response is what special training does the c10 have that the c46 > doesn’t ? > Jason Andrade > West Coast Sustainables > > Sent from my iPhone > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > <mailto:RE-wrenches@lists.re-wrenches.org> > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > <http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org> > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > <http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html> > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm <http://www.re-wrenches.org/etiquette.htm> > > Check out or update participant bios: > www.members.re-wrenches.org <http://www.members.re-wrenches.org/> > > > ___ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] clear sealant recommendations
We've been using M1 and Thru the Roof sealant for years with good
success.. Max Balchowsky
Design Engineer
Golden Bridge Development
1048 Irvine Ave Suite 217
Newport Beach, Ca. 92660
760-403-6810Building a Better Future For The Next Generation
From: SunHarvest e...@harvesthesun.com
To: RE-wrenches re-wrenches@lists.re-wrenches.org
Sent: Tuesday, August 11, 2015 2:07 PM
Subject: Re: [RE-wrenches] clear sealant recommendations
I like 'Through The Roof'.
Eric StikesOwner, SunHarvest Solar CA. Solar Contractor #968280
Founding Director, GoodSun Solar CA. Non-profit Corp.001.530.798.3738
(cell)www.harvesthesun.com[message sent from cell phone]
On Aug 10, 2015, at 2:52 PM, August Goers aug...@luminalt.com wrote:
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1.0in 1.0in;}#yiv0171693954 div.yiv0171693954WordSection1 {}#yiv0171693954 Hi
Wrenches, For the most part we are using Chemlink M1 sealant for to seal our
rooftop penetrations. It hasn’t let us down yet. M1 is a available in several
opaque colors and grey is the most common. Sometimes we want a good quality
clear sealant to put around conduit fittings, where our conduit enters
buildings, etc. We used Geocell 2300 in the past and I don’t have anything bad
to say to it but our current supplier doesn’t carry Geocell products. More
recently we’ve tried Chemlink Clear sealant but I’ve already seen signs that it
doesn’t hold up well in the elements – it seems to peel off the surface it was
installed on and turn brown relatively fast. Does anyone have a good
multipurpose clear sealant that they like? Best, August
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Re: [RE-wrenches] Charging Multiple Battery Banks
Does anyone have any experience with the PowerGrid battery system (by Clean
Energy)? we are getting ready to install a 27kW array with a 22kWH Battery Bank
and 4 Schneider/Xantrex XW 6848's.
Max Balchowsky
Design Engineer
Golden Bridge Development
1048 Irvine Ave Suite 217
Newport Beach, Ca. 92660
760-403-6810Building a Better Future For The Next Generation
From: Jeremy Rodriguez allsolarjer...@msn.com
To: RE-wrenches re-wrenches@lists.re-wrenches.org
Sent: Wednesday, March 25, 2015 8:07 PM
Subject: Re: [RE-wrenches] Charging Multiple Battery Banks
I'm sure he will use the SW until it dies. I would. Never thought of running AC
from the 24v side to the dual outbacks to charge the 48 V BB. Would need a xfmr
though right?I would install a separate Midnite CC for each battery bank. I
know the classics output 12v at the aux, so what type of relay could be used?
Does it need to be solid state ?I would feel better using some type of control,
or as was mentioned, maybe talk him into just hooking everything up to the OB
system at the house. The 24v side would be for occasional use only.
Thanks for the input!
Jeremy Rodriguez All Solar, Inc. 1463 M
Penrose Colorado 81240
Sent by Jeremy's iPhone. Sorry for typos and shorthand!
On Mar 25, 2015, at 11:25 AM, Ray Walters r...@solarray.com wrote:
Hi Jeremy;
I usually would combine both buildings all into one system, KISS principle,
and also less cost. Later when those batteries die, replace with a properly
sized bank. I also wouldn't be building a new system around an SW4024, those
are getting really dated. Great inverter, but they don't last forever. They
have excellent resell value on Ebay for folks that need replacements in dual
and quad systems.
Having said that, Jerry's idea of 2 controllers on one array sounds like it
would work, but not with Blue Sky because of the grounding as Larry mentioned.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760 On 3/25/2015 10:36 AM, Larry wrote:
Keep in mind that the Midnite controller has a combined PV and bat. negative
and the Blue Sky requires isolated PV and bat. negative.
Larry Crutcher
Starlight Solar Power Systems
On 3/24/15 6:11 PM, Jeremy Rodriguez wrote:
The thought was to charge the batteries for a new building utilizing an SW4024
with new classic controller and new L A batteries, and once those batteries are
charged send the PV to the house system which is the 48v setup with dual
outback inverters and dual SB3048 CCs. Lead acid batteries as well. 3 years
old I've never had this come up in 16 years!
Jeremy Rodriguez All Solar, Inc. 1463 M
Penrose Colorado 81240
Sent by Jeremy's iPhone. Sorry for typos and shorthand!
On Mar 24, 2015, at 5:31 PM, Ray Walters r...@solarray.com wrote:
What's the reasoning behind two different battery banks at different voltages?
What is the other equipment involved: batteries type, age, inverters, etc.?
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760 On 3/24/2015 5:07 PM, Jeremy Rodriguez wrote:
#yiv6321955796 #yiv6321955796 --.yiv6321955796hmmessage
P{margin:0px;padding:0px;}#yiv6321955796
body.yiv6321955796hmmessage{font-size:12pt;font-family:Calibri;}#yiv6321955796
It would be 2kw of PV
Jeremy
All Solar
Penrose, CO
Date: Tue, 24 Mar 2015 12:17:20 -1000
From: jerrysgarag...@gmail.com
To: re-wrenches@lists.re-wrenches.org
Subject: Re: [RE-wrenches] Charging Multiple Battery Banks
How big of a system are you looking at as some of the smaller charge
controllers are auto sensing
Jerry
On Tue, Mar 24, 2015 at 12:11 PM, Jeremy Rodriguez allsolarjer...@msn.com
wrote:
Wrenches,
I have a client that wants to charge a 24v battery bank and a 48v bank with
the same array. Different charge controllers, with some type of relay is what I
was thinking, and using the controller's aux. 12v output for the relay
control.
The primary battery to be charged would be the 24v bank, then once it is fully
charged, divert the pv to the secondary controller at the 48v bank.
Any comments or recommendations on this would be helpful.
Jeremy Rodriguez
All Solar Inc.
Penrose, CO
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Re: [RE-wrenches] Load testing Lithium battery bank
We're leaning toward the LiFePO4 batteries (low internal resistance) GBS have a medium high resistance so they warm faster and have a lower C rate efficiency, were gathering info as we go.. Max Balchowsky Design Engineer Golden Bridge Development 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810Building a Better Future For The Next Generation From: Larry la...@starlightsolar.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Wednesday, March 18, 2015 8:57 AM Subject: Re: [RE-wrenches] Load testing Lithium battery bank Hi Jarmo, I agree and recognize your urgency in making us aware of the proper use and charging of Li-ion batteries as well as the dangers of mistreating them. As an early adopter myself, I am very cautious in my approach even to the point of refusing to sell to some customers. Lithium battery technology is in a state of rapid evolution. Not wanting to harp on the GBS brand that I sell, but one of your points goes to prove the safety of their integrated approach. You said, ...all it takes is one poor connection or broken temp sensor on one cell. The GBS EMS system has cell level sensors for temperature (and other data) and each sensor board requires constant communication with the CPU. If the EMS fails to communicate any information with any cell, the CPU immediately shuts down both safety solenoids, disconnecting the battery. With the non integrated systems, failures that don't report information to the management system could lead to disaster. Please keep offering us the knowledge you are gaining as I am a firm believer that Lithium technology is a large part of the inevitable replacement the aged lead battery. Larry Crutcher Starlight Solar Power Systems On 3/17/15 6:11 PM, jarmo.venalai...@schneider-electric.com wrote: Hi: I may sound like I'm a detractor against using Lion, but that's not it. What I want to bring to light is that, being as the technology is new, not all the issues are known and there are things to learn for all early adopters in the foreseeable future. From what I can gather the framework for the issues lies in that Lion technology is based on intercalation, that is, a reversible insertion and removal of Li molecules into compounds with microscopically layered structures. This predicates that there must be no chemical reaction in the battery, but rather only the shelving of the highly reactive Li ions. If there are any chemical reactions taking place, then in the least the battery performance is compromised and in the most there is a thermal event or worse There are some very robust Lion battery packs, a favorite of mine being from a local company from Vancouver, (well Richmond, which is a suburb of Vancouver). It's a small company, but they have designed, developed, built and successfully approved their 6 kWh Lion pack for use in large car ferries in Scandinavia. The ferries have stacks of these packs in the 100's, in the MWh size. It can be done. What I'm advocating is that its best to work with companies that have the time, interest and resources to work through the wrinkles, and if not, then carefully put in reliable and precise BMS circuitry which includes things like fail safe circuits for single point failures of critical sensing circuits, the foremost of which is cell temperature. When you're pushing large currents, all it takes is one poor connection or broken temp sensor on one cell.. Here's a link to the Lion battery pack manufacturer, Corvus, http://corvus-energy.com/ I know they do a good job, but they're not cheap, for now... JARMO Jarmo Venalainen | Schneider Electric | Xantrex Brand | CANADA | Sales Application Engineer Phone: +604-422-2528 | Tech Support: 800-670-0707 | Mobile: +604-505-0291 Email: jarmo.venalai...@schneider-electric.com | Site: www.Xantrex.com | Address: 3700 Gilmore Way, Burnaby, BC V5G4M1 | | | | | | | | | ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Corrugated Roof Brackets
we've installed hundreds of these and use rubber grommets Max Balchowsky Design Engineer Golden Bridge Development 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810Building a Better Future For The Next Generation From: jay peltz j...@asis.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Thursday, March 5, 2015 2:40 PM Subject: Re: [RE-wrenches] Corrugated Roof Brackets Hi Mark, I'm curious how you seal the hole. thanks jay peltz power On Mar 5, 2015, at 9:46 AM, Mark Westbrock westbr...@positiveenergysolar.com wrote: We like the SnapNrack corrugated roof blocks. They are simple, effective, and not too expensive (I think around $3.50 each). The only trick is that you need access to the roofing members because you will need to add blocking or sister up trusses so that you have a structural member directly below a corrugation peak. Mark Westbrock Branch Manager Employee-OwnerNM EE98J Journeyman Electrician NABCEP Certified PV Installation ProfessionalNABCEP Certified PV Technical Sales Positive Energy, Inc. 510 S. Main St.Las Cruces, NM 88001 office: 575-524-2030 cell: 575-640-2432 m...@positiveenergysolar.com www.positiveenergysolar.com On Thu, Mar 5, 2015 at 9:00 AM, AE Solar autonomousenerg...@gmail.com wrote: Hey Wrenchers,Anyone have feedback or preferences on mounting systems for corrugated roofs? I'm looking at the S-5! CorruBracket. Its for a very small system on a hunting cabin. The pitch is probably about 20 degrees and and I'm concerned about leaks over time. Any recommendations are appreciated. ThanksAdam Adam Katzman Autonomous Energies 4872 State Route 9G Germantown NY, 12526 www.autonomousenergies.com (518) 567-1468 ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Off Grid Alarm
There are monitoring systems that will send text or email alerts Max Balchowsky Design Engineer Golden Bridge Development 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810Building a Better Future For The Next Generation From: drake.chamber...@redwoodalliance.org drake.chamber...@redwoodalliance.org To: re-wrenches@lists.re-wrenches.org Sent: Thursday, February 12, 2015 6:52 AM Subject: [RE-wrenches] Off Grid Alarm We are looking for an audible alarm that will not drive the pets crazy if it stays on for hours when no one is home. At present, only a red indicator light goes on when the grid is down. It would need to run off 120 VAC. Does anyone have any suggestions? Thanks, Drake ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Backsheet Camo
We've put hundreds of tilted arrays on flat roofs over years. Some cities required screening to make it more ascetically pleasing. What we did under some circumstances was put a metal mesh surrounding the tilted array attached to the back and edges to put a siding on the structure to make it look better. We found a couple companies in LA and San Bernardino that manufactured a metal sheeting that was used for screen doors, it had 1/8 holes about 3/16 inch apart, from the street it looked solid, but had plenty of venting to allow a good circulation of air. It came in 4' x 8'or 4x10' sections. Max Balchowsky Design Engineer Golden Bridge Development 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810Building a Better Future For The Next Generation From: Greg g...@remotepowerinc.com To: re-wrenches@lists.re-wrenches.org Sent: Friday, December 26, 2014 8:13 AM Subject: Re: [RE-wrenches] Backsheet Camo Bill, It would be nice if people cared more about the earth and less about the perceived beauty of a roof with no solar visible. Anyway, my concern is wind loading on the 6 of array you have exposed. Not sure if you get high winds but that array may be up there for decades. Unfortunately I don't have a quick fix suggestion but maybe another wrench has been there/done that before. I'm thinking something dark that looks like the roof but redirects the wind from the North up and over the top edge of your S facing array. Best, Greg Egan NABCEP Certified PV Installer Remote Power Inc. ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] 120% rule
We've been using the Sq D and Seimens Solar Ready service panels, they come pre-wired with a line side tap Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810Building a Better Future For The Next Generation From: Jerry Shafer jerrysgarag...@gmail.com To: RE-wrenches RE-wrenches@lists.re-wrenches.org Sent: Tuesday, December 2, 2014 9:13 AM Subject: [RE-wrenches] 120% rule I have seen a lot of talk about the meter main and solar breakers and what the 120% rule is intended for. I have seen a product at SPI this year and as I am not pushing this product or indorsing it, it may be of value to some of you that are dealing with the issue of system size vs meter main check out B3 bypass its a breaker with internal bypass built in and does not connect in to the buss. Jerry NABCEP ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Load Side Tap
Fellow wrenches, I've got an install that is a little different than any I've done before. We are going to put an 18 Kw groundmount on the side of a hill (nothing new so far). The Array will be about 150 feet from a 200 amp MLO subpanel in the garage of a guest house. Still nothing new. The sub panel is 500 ft from the 400 amp main service. The 200 amp sub feed is 250 MCM. There is not much load on the 200 amp sub panel. The twist on this one is this, there is a pull box in the vicinity of the proposed array location. It contains the feed from the House Main (250 MCM) It simply loops thru the box, I'm sure because of the length of the run. We are 400 feet from the main 400 amp panel and about 100 ft from the 200 amp sub panel. My thoughts are to tap the 250 MCM in the pull box to back feed the subfeed to the Main. The other option is to pull wire from the pull box to the sub panel and land a breaker for the 95 amp feed from the array. Any thoughts?? Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 Building a Better Future For The Next Generation ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Concentrics at 250 volts plus
Most inspectors want to see a bond bushing following the array equiptment ground wire all the way back to the panel. We bring it back to a gutter under the equipment, then land it on a ground buss in the gutter. Everything else is also grounded here… This lug is then grounded either to an existing ground rod or ufer or, if required, the new ground rod. Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660f 760-403-6810 Building a Better Future For The Next Generation From: Corey Shalanski cshalan...@joule-energy.com To: re-wrenches@lists.re-wrenches.org Sent: Tuesday, July 15, 2014 3:43 PM Subject: Re: [RE-wrenches] Concentrics at 250 volts plus Related question: How should we treat circuits that are less than 250V? Does the EMT need to be bonded at EITHER end? Some of our local inspectors are requiring bonding around all concentric/eccentric knockouts, regardless of circuit voltage. -- Corey Shalanski Joule Energy New Orleans, LA ᐧ On Tue, Jul 15, 2014 at 12:45 PM, re-wrenches-requ...@lists.re-wrenches.org wrote: Message: 3 Date: Mon, 14 Jul 2014 15:11:44 -0700 From: William Miller will...@millersolar.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Subject: [RE-wrenches] Concentrics at 250 volts plus Message-ID: 52645f97-f231-4149-a8fd-d2e44e315...@millersolar.com Content-Type: text/plain; charset=us-ascii Friends: Please help us settle a crew debate before we come to blows: for circuits 250 volts and higher, do we need to bond EMT at both ends? Or, if there is bonded cabinet with a concentric on one end and a solid, bonded metal cabinet on the other, do we need a bonding bushing on the concentric end? I say a conduit needs to be bonded only on one end. My misguided employee says both ends. Both cabinets are independently bonded. Thanks in advance. William Miller Solar ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Racking System - Identification Help
That does look like the early Unirac system, (I don't think they rated it for 140 mph). It wasn't designed to hit rafters, that's why there six screws in each base plate…. Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 Building a Better Future For The Next Generation From: Dave Click davecl...@fsec.ucf.edu To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Tuesday, June 3, 2014 6:06 AM Subject: [RE-wrenches] Racking System - Identification Help Hi all, Anyone know what this racking system is? The permit drawings say Unirac with lag screws and Eco-Fasten flashings, which this pretty clearly isn't. I'd never seen this before, and I imagine this wind resistance is not quite the 140 mph that the installer claims it is. Of the ~250 wood screws holding this system down into the roof, I think six of them accidentally hit rafters. Thanks! Dave ___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org Preferences § 1 2 3 4 5 6 7 8 9 0 - = Backspace Tab q w e r t y u i o p [ ] Return capslock a s d f g h j k l ; ' \ shift ` z x c v b n m , . / shift English Deutsch Español Français Italiano Polski Português Русский alt alt Preferences___ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Solar Edge Experience?
We've been using Solar Edge for quite a while now, very impressed. I like the flexibility of design with out having to use micro inverters….. Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 Building a Better Future For The Next Generation From: August Goers aug...@luminalt.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Monday, May 5, 2014 2:58 PM Subject: Re: [RE-wrenches] Solar Edge Experience? Hi Bill, That was my take up until recently. However, we’ve had lots of Enphase failures with M190s and M210s (to Enphase’s credit, no failures yet with M215s and M250s) so I’m hesitant to put more and more micros up on the roof. Plus, the price starts to beat micros around a system size of 4+ kW. We’re seeing a lot of competitors offer Solar Edge in the Bay Area including Solar City so there must be some good reasons to use them. In my mind, reliability is of utmost importance and I don’t have any firsthand knowledge on how the Solar Edge systems are working. I think they’ve only been in the US for about 3 years. Best, August From:re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of William Dorsett Sent: Monday, May 05, 2014 11:36 AM To: 'RE-wrenches' Subject: Re: [RE-wrenches] Solar Edge Experience? August, it’s hard for me to see the point if you get all those benefits (long strings, module level tracking and monitoring, design flexibility) for the same price with micros. Bill Dorsett Manhattan, KS From:re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of August Goers Sent: Monday, May 05, 2014 10:57 AM To: RE-wrenches Subject: [RE-wrenches] Solar Edge Experience? Hi Wrenches, I have been watching Solar Edge for a while now and am curious if other wrenches have been using their product and what they think about it. I’m generally hesitant to adopt new technology until it has a good track record but I have to admit that I’m seeing some serious benefits in the Solar Edge system – long strings, module level tracking and monitoring, design flexibility, etc. Can folks who have tried their product let me know what you think and if you’ve had any failures? http://www.solaredge.us/groups/us/inverter/single-phase-solar-inverter Best, August Luminalt ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org Preferences § 1 2 3 4 5 6 7 8 9 0 - = Backspace Tab q w e r t y u i o p [ ] Return capslock a s d f g h j k l ; ' \ shift ` z x c v b n m , . / shift English Deutsch Español Français Italiano Polski Português Русский alt alt Preferences___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] SnapNrack
We have been using Snap N' Rack for a while, Have lots of installs in Hawaii - so far no problems, I like the convenience of the design for snapping in the slider nut in mid rail, and also the ability to install the panels flush with the end of the rails…. Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 Building a Better Future For The Next Generation From: Allen Frishman amfr...@aeonsolar.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Wednesday, February 5, 2014 6:17 AM Subject: Re: [RE-wrenches] SnapNrack I am curious about the mid clamps on the snapnrack. The flange that rests on top of the solar panel frame is so small ~ 3/16. Anyone experience any problems with these failing in a big storm? With solar panel frames not being square it is nice to have a little extra to grab - I am always curious as to why these clips are made with such a small area to hold the panels down. All feedback on these clips is appreciated. Al Frishman AeonSolar (917) 699-6641 - cell (888) 460-2867 www.aeonsolar.com On Jun 1, 2013, at 10:41 AM, Max Balchowsky wrote: Have installed last three systems (35Kw)with snap n rack. love it Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 Building a Better Future For The Next Generation From: Solarguy nt...@1scom.net To: 'RE-wrenches' re-wrenches@lists.re-wrenches.org Sent: Friday, May 31, 2013 10:11 PM Subject: Re: [RE-wrenches] SnapNrack The only complaint with the Snapnrack rails is the thin wall can easily be distorted. This will allow the nut to drop out of its groove. Love the universal end clamps but have learned to assemble every one to check for proper fit before getting on the roof. Jim Duncan -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Drake Sent: Friday, May 31, 2013 7:32 PM To: re-wrenches@lists.re-wrenches.org Subject: [RE-wrenches] SnapNrack Hello Wrenches, How would you rate the SnapNrack mounting systems against Unirac and other mounting systems? Thanks, Drake ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org Preferences § 1 2 3 4 5 6 7 8 9 0 - = Backspace Tab q w e r t y u i o p [ ] Return capslock a s d f g h j k l ; ' \ shift ` z x c v b n m , . / shift English Deutsch Español Français Italiano Polski Português Русский alt alt Preferences___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Solar Carport on a Parking Ramp
Hi Karl, check with the Contractor that installed the parking structure if thats possible. What you do will be determined by what type of construction was used to build the structure, the carport manufacturer will want input, and they will have engineering staff to advise you, you'll need to know if it is Post Tension, Cast-in-Place Concrete, Precast Concrete or Steel Framed construction. Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 Building a Better Future For The Next Generation From: Karl Jaeger kjae...@lightwavesolar.com To: re-wrenches@lists.re-wrenches.org re-wrenches@lists.re-wrenches.org Sent: Wednesday, February 5, 2014 11:40 AM Subject: [RE-wrenches] Solar Carport on a Parking Ramp Howdy Wrenches, Any of y’all have any experience with installing a carport atop a parking ramp? Any lessons learned and/or advice you could give? Any recommendations on attachment methods to the pre-stressed concrete? Much appreciated! Karl Jaeger LightWave Solar Electric LLC ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Breaker Testing
I have a 90 amp 480 Volt GFI backfeed breaker in an 800 amp Standup Service Panel in the City Of Los Angeles that I need to get tested. Does anyone have a referral? Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 Building a Better Future For The Next Generation ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Sealing roof vent
Are you talking plumbing vent or attic vent? Either can be moved, but we have simply cut plumbing vents to be under the array where the jurisdiction will allow. I wouldn't seal a plumbing vent. Attic vents we lower and sceen to keep critters out but still allow venting. Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 Building a Better Future For The Next Generation To:RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Thursday, October 3, 2013 6:02 AM Subject: [RE-wrenches] Sealing roof vent Hello Wrenches, We are moving a roof vent. My plumber suggested that we cut the old one and cap it instead of having to repair the roof. I'm not sure a capped vent would be short enough to fit under the array. What if we were to cut the vent off at the flashing level and plug the pipe. A rubber plug could be put in and topped with hydraulic water-stop cement. Neoprene roof sealant could be spread on top of that. Has anyone tried anything like that? Are there any other good options? Can you see any issues with this method? Thanks, Drake Drake Chamberlin Athens Electric LLC OH License 44810 CO License 3773 NABCEP Certified Solar PV 740-448-7328 http://athens-electric.com/ ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Church Solar
Members can form LLC that can take tax advantages. PPA can sell energy to church Check with your favorite tax person. Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 Building a Better Future For The Next Generation From: Alex Cozine acdc.coz...@gmail.com To: RE-wrenches RE-wrenches@lists.re-wrenches.org Sent: Thursday, September 12, 2013 9:41 AM Subject: [RE-wrenches] Church Solar I ask, WWWD, what would wrenches do for church/school installations in respect to federal/production incentives specifically at churches and schools? One person champions the federal tax incentive? A corporation/congregation owns the proposed system? Each member of congregation owns a module? Is there any way to have tax/production incentives at a church? -- Alex CozineNABCEP Certified Solar PV Installer™ Journeyman Electrician Brothers Electric Solar brotherselectricsolar.com ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Feeding 160A 3PH to a 800A/800A Main Service
What type of 800 Amp main is it? and, Hopefully it's not City of LA. Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 Building a Better Future For The Next Generation From: Pekka Laine pe...@photonsolarpower.com To: re-wrenches@lists.re-wrenches.org Sent: Monday, June 17, 2013 10:33 AM Subject: [RE-wrenches] Feeding 160A 3PH to a 800A/800A Main Service Dear Fellow Wrenches, We have a small 50kW 120/208V commercial job with five 9kW 3PH inverters, each outputting max. 25A. We are landing those into a dedicated load center with five 40A breakers. Doing the math, 5 x 25A x 1.25 = 156.25A, we would need a 160A breaker. This also equals to the maximum we can backfeed into a 800A/800A Main Service on the load side according to the 120% rule. The problem now is that we cannot locate any kind of 160A breaker or even a 160A fuse for a AC disconnect. Has anybody ever done this without doing a line-side tap? It is hard to believe that there wouldn't be an existing solution to landing maximum PV into a 800A service. Are we missing something? Any good ideas or comments would be appreciated. Sincerely, Pekka Laine President Photon Solar Power Inc. www.PhotonSolarPower.com Cell. 760-556-8170 Toll Free 888-SUN-ACDC CA Lic. #933648 NABCEP Certified PV Installer # 032611-174 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] KAIC Rating
I'm looking for information for plan check at LADWP. I'm installing a Solecria 60Kw inverter and feeding into a 90 amp breaker in an existing 800 amp Main Service Stand up section. The Fault current available at the service connection point is 42,500 KAIC. I need to know the rating of the Solectria Inverter connection point, which is the 3 pole AC Disconnect, which is an Eaton Disc. If I use a Fusible Disc at the inverter and fuse it at 90 amp, then I'll need 4/0 wire between the Breaker at the service panel and the Disc on the inverter, this wire size will allow a lot of the fault current thru, therefore the rating at the Disc. needs to be adequate. I can't find anything in the tech specs for the inverter. I'm installing 35' of Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 Building a Better Future For The Next Generation Preferences § 1 2 3 4 5 6 7 8 9 0 - = Backspace Tab q w e r t y u i o p [ ] Return capslock a s d f g h j k l ; ' \ shift ` z x c v b n m , . / shift English Deutsch Español Français Italiano Polski Português Русский alt alt Preferences___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] PV on Mission Tile
Jason, what we've done many tines on these types of roofs is had the homeowner work with a roofer of their choice, or we would supply one, to remove the tile on the area where the array will be. then they put down a hot mop or suitable roofing material and we install the racking and array over it. The roofer then comes back and installs the tile up to the edge of the array. This provides them with a very clean looking install that looks integrated into the tile roof. If they don't want to do that we usually use Prosolar tile track, or something similar, removing the spots where the penetration is located, drilling the tile for the riser and replacing it over the top of the riser. Prosolar has a nice demo of this procedure on their website. Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 Building a Better Future For The Next Generation From: Jason Szumlanski ja...@fafcosolar.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Friday, June 7, 2013 12:41 PM Subject: [RE-wrenches] PV on Mission Tile Anyone have any best practices or product recommendations for installing PV on mission tile with vertical 2x4 stringers? Specifically, I'm looking at a Ludowici mission clay tile. Jason Szumlanski Fafco Solar ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org Preferences § 1 2 3 4 5 6 7 8 9 0 - = Backspace Tab q w e r t y u i o p [ ] Return capslock a s d f g h j k l ; ' \ shift ` z x c v b n m , . / shift English Deutsch Español Français Italiano Polski Português Русский alt alt Preferences___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] SnapNrack
Have installed last three systems (35Kw)with snap n rack. love it Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 Building a Better Future For The Next Generation From: Solarguy nt...@1scom.net To: 'RE-wrenches' re-wrenches@lists.re-wrenches.org Sent: Friday, May 31, 2013 10:11 PM Subject: Re: [RE-wrenches] SnapNrack The only complaint with the Snapnrack rails is the thin wall can easily be distorted. This will allow the nut to drop out of its groove. Love the universal end clamps but have learned to assemble every one to check for proper fit before getting on the roof. Jim Duncan -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Drake Sent: Friday, May 31, 2013 7:32 PM To: re-wrenches@lists.re-wrenches.org Subject: [RE-wrenches] SnapNrack Hello Wrenches, How would you rate the SnapNrack mounting systems against Unirac and other mounting systems? Thanks, Drake ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org Preferences § 1 2 3 4 5 6 7 8 9 0 - = Backspace Tab q w e r t y u i o p [ ] Return capslock a s d f g h j k l ; ' \ shift ` z x c v b n m , . / shift English Deutsch Español Français Italiano Polski Português Русский alt alt Preferences___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Cleaning Modules
I cleaned my system in Palm Springs with rain-ex every 4 months. It did a great job and left a coating that keep the dust from sticking to the modules I probably didn't need to clean it that often, but it was easily accessible. I put a garden sprayer on a hose to coat the panels after I cleaned them using a dust mop on an extension handle to remove any dirt. Each time they needed less cleaning. Rain-ex keeps the dirt from sticking. Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 Building a Better Future For The Next Generation From: Solar Energy Solutions solarenergysoluti...@yahoo.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Thursday, April 18, 2013 10:09 AM Subject: Re: [RE-wrenches] Cleaning Modules We use a mild solution of Cascade dishwashing soap and a car wash brush. We have been tempted by a product call Power Boost. Andrew Koyaanisqatsi President Solar Energy Solutions, Inc. Since 1987, Moving Portland and Beyond to an Environmentally Sustainable Future. 503-238-4502 http://www.solarenergyoregon.com/ Better one's House too little one day than too big all the Year after. From: Benn Kilburn - DayStar Renewable Energy b...@daystarsolar.ca To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Thursday, April 18, 2013 10:05 AM Subject: Re: [RE-wrenches] Cleaning Modules Corey, If rain water isn't doing good enough, which it usually does depending on angle and other factors….. -pick up a window washing squeegee (like at a gas station) that you can add a longer, maybe telescopic handle. That works great. -Just use water, it works fine. There is no need for additional chemicals or cleaners. If bird crap or dirt is particularly stubborn just wet it, scrub it, wet it again and let it soak a few minutes, then it should wipe right off. Keep in mind most module mfgrs recommend nothing more than a mild detergent added to water (read the specific module instructions). -Be wary of temp differences between water and module glass. Cold water on hot glass can cause the glass to crack. Best to wash in the morning before the glass heats up. I've seen a few module washing products (automatic sprayers) advertised, but have no first hand experience with any. Good luck, benn From: Corey Shalanski cshalan...@joule-energy.com Reply-To: RE-wrenches re-wrenches@lists.re-wrenches.org Date: Wednesday, April 17, 2013 7:20 PM To: RE-wrenches re-wrenches@lists.re-wrenches.org Subject: [RE-wrenches] Cleaning Modules Greetings Wrenches, I am wondering if anyone can offer tried-and-true tips for cleaning modules: tools, materials, methods? -- Corey Shalanski Joule Energy New Orleans, LA ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: http://www.members.re-wrenches.org/ ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Cable tray
I don't know your exact application, but I've used Carlon wireways for years. Our application most of the time was to use the 4x4 gutter in lieu of metal gutter under the inverters,disconnects, Panelboards, etc. http://www.carlonsales.com/wiresafe.php Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 Building a Better Future For The Next Generation From: Chris Mason cometenergysyst...@gmail.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Friday, March 22, 2013 12:07 PM Subject: [RE-wrenches] Cable tray I'm looking for flat roof cable tray system that is cost effective. We previously used Cablofil and Cablo-port FSL 12 tray but it is very expensive for our current application due to the size of the roof. We need to install about 200' of tray and Cablofil galvanized is eating up the budget. Can anyone recommend a cheaper alternative. -- Chris Mason ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Metal shingles
We've installed 3 metal roof systems over the years and we used the pro solar tile track. Now Prosolar has the small flashing to seal the all thread penetrations. You might ask them about that application for a metal roof. The problem we encountered was maneuvering on the metal, in some ways it was more troublesome than the spanish tile Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 Building a Better Future For The Next Generation From: Ray Walters r...@solarray.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Thursday, March 21, 2013 8:06 AM Subject: Re: [RE-wrenches] Metal shingles How is this roof type for flashing? Do you just cut it with a tin snips? My project only entails replacing an unflashed conduit penetration with a Soladeck, so I'm hoping it won't be too bad. R.Ray Walters CTO, Solarray, Inc Nabcep Certified PV Installer, Licensed Master Electrician Solar Design Engineer 303 505-8760 On 3/21/2013 8:58 AM, Jason Szumlanski wrote: We've used the standoff and boot method successfully. It dictates where you put your rows to some extent, but it's not too bad. There is definitely a hefty up-charge on this roof type. It adds quite a bit of labor and material. Jason Szumlanski Fafco Solar On Thu, Mar 21, 2013 at 7:52 AM, Will White william.wh...@realgoods.com wrote: We've done a couple of installs on metal shingle roofs and we used the Unirac stand offs with the Oatey boots. We had the standoffs and flashing installed by the roofer so it wouldn't void the roof warranty. It cost about $1500 extra but we thought it was worth if in case of a leak. Thanks, Will __ Will White Regional Field Operations Manager - New England Real Goods Solar 64 Main St. Montpelier, VT 05602 Tel: (802) 223-7804 Cell: (802) 234-3167 www.realgoodssolar.com -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jesse Dahl Sent: Wednesday, March 20, 2013 11:33 PM To: Wrenches Subject: [RE-wrenches] Metal shingles Hello, I looked at a site today and the roofing was a brand of metal shingle. This was just a quick drive by and check out the site so I don't have access to the brand or method of attachment. It still got me thinking, what are people doing for attachments to roofing like this? 6/12 pitch, and from the photos the client sent me, the structure is 2X6 truss running N-S, with 1x4 strapping every 4' running E-W along with 5/8 OSB on top of the strapping. The trusses look to be on 4' centers (just judging by the photo). The only thing I can think of is EJOT type fasteners through the shingle into the truss. The shingles would crush a little bit, but the OSB would support it pretty well. Otherwise removing the shingles where the feet would go and then. As always thanks for all the help. Jesse Sent from my iPhone ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Change email address settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out
Re: [RE-wrenches] Enphase and Romex
We've got dozens of installs here, and more recently in Hawaii with Romex coming out of the bottom of a soladeck into the attic space, just make sure the Romex in the attic is labeled and it's sized correctly Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 From: benn kilburn b...@daystarsolar.ca To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Friday, October 26, 2012 11:02 AM Subject: Re: [RE-wrenches] Enphase and Romex Glenn/Jason, So you wouldn't use romex to feed an exterior outlet on an outside wall, or to any outside lights??? Canadian Electrical Code's (CE Code) definitions… wet location -a location in which liquids may drip, splash, or flow on or against electrical equipment. Damp location –an exterior or interior location that is normally or periodically subject to condensation of moisture in, on, or, adjacent to electrical equipment an includes partially protected locations under canopies, parquees, roofed open porches, and similar locations. Dry location –a location not normally subject to dampness, but that may include a location subject to temporary dampness as in the case of a building under construction, provided that ventilation is adequate to prevent an accumulation of moisture. If inside your attic is considered a wet location, then you have other issues. Are you sure the NEC's definition of 'wet location' is relating to the location of the romex? I just spoke to one of my inspectors and he sees no issue with entering the bottom of a soladeck with romex. On the grounding/bonding, I have been using the bare wire in the romex for the enphase system ground (within the enphase cable) and running a #6 from the mod frames and rails into the soladeck and along side the romex back to the panelboard. I need to get myself a copy of your NEC so I can be on the same page as you guys. I hear it is written in a way that is much easier to interpret than the CE Code, which is written in a very legal jargon. Cheers, benn DayStar Renewable Energy Inc. www.daystarsolar.ca * Ph: 780-906-7807 Construction Electrician Solar Photovoltaic Systems Certified Certificate # 0007S HAVE A SUNNY DAY On 25/10/12 9:37 AM, Glenn Burt glenn.b...@glbcc.com wrote: Soladeck on the rooftop places it in an environment that is considered ‘wet’. I don’t think Romex is listed for use in a wet environment. This would force you to use the proposed jbox in the attic for the transition location. I also understood that you could combine the EGC and GEC into a single conductor as long as it is continuous or irreversibly spliced, as part of the ’08 code. -Glenn Burt From:re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jason Szumlanski Sent: Thursday, October 25, 2012 9:13 AM To: RE-wrenches Subject: [RE-wrenches] Enphase and Romex I'm sure this has been covered, but I could not find it in the archives. We are considering using Romex in the attic for the first time. My plan was to use the new Enphase coupler to connect the trunk cable to Type TC-ER, enter a Soladeck passthrough box on the roof into a junction box in the attic where I would make the transition to 10/3 Romex. I'm hung up on the GEC going back to the service panel. Any suggestions? By the way, we are on NEC 2008, and in most cases there is also a requirement for an additional grounding electrode per NEC 690.47(D) (that shouldn't really relate to my issue). Jason Szumlanski Fafco Solar ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] tile roof solutions
We've used the ProSolar tile track over the years and it has worked well. I've installed hundreds of systems in the Coachella Valley in the Palm Springs area of Southern California. Many of the roofs are S-Tile. This tile is very fragile and you need to expect to crack tiles that will need to be replaced. We drill the S-Tile and replace it over the all-thread standoff, sealing the penetration with one of the many solutions on the market. Another method we've used with success is to remove the tiles under the area of the array and have a roofer put down a layer of roll out roofing material, then we replace tiles up to the edge of the array, it gives the array a integrated look, but adds a little to the overall cost. Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 From: mac Lewis maclew...@gmail.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Thursday, July 5, 2012 8:30 PM Subject: [RE-wrenches] tile roof solutions Hello re-wrenches, I am looking for advice on mounting PV on an S tile roof. Does anyone have a product recommendation for this? Is there any easy way to do this? Thanks -- Mac Lewis Yo solo sé que no sé nada. -Sócrates ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] L feet no flashing in shingle roof
In the early days before a lot of the manufactured mounting systems became prominent we used a stainless rod hanger. it was 6 inches long with 4 in of lag and 2 inches of thread. we'd put on a fender washer and bolt, filled the hole with a product called through the roof - a fifty year sealant. We had used power strut for years as a commercial electrical contractor so we'd put strut between two stainless bolts and washers then use a custom t-clamp with bolt and a spring nut. There were no flashings, just a good seal under the washer. I've got dozens of systems installed like that, years old. No leaks. The important thing was hitting the rafter in the center and getting good torque on the bolt. I've come in behind other contractors over the years to fix leaks and more often than not they missed the rafter or were on the edge so it eventually became loose. Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 From: Drake drake.chamber...@redwoodalliance.org To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Monday, July 2, 2012 3:58 PM Subject: Re: [RE-wrenches] L feet no flashing in shingle roof How do you flash your L feet without using a standoff? At 07:49 AM 7/2/2012, you wrote: I've found that the Flashed L-Foot connection costs about $0.10/w on a typical residential system, and only adds about 1/4-1/2 to the height, which can be minimized using the slotted holes in a typical L-Foot. We need a lot of attachments for 172 mph design wind speeds around here. Flashings at $500 for a 5kW seems high, especially now as the percentage of the system price increases. That being said, I would install L-Foot flashings on my own roof - no exceptions. On the other hand, I've seen sealed lag screw connections work with solar pool heating systems for decades without indication of problems. A variety of sealants were used in the old days but most recently Sikaflex 1A (which incidentally is not indicated for asphaltic roofs) and Geocell 2300 have worked great. My 10 cents, :) Jason Szumlanski Fafco Solar On Fri, Jun 29, 2012 at 10:49 AM, jay peltz j...@asis.com wrote: I have had the opportunity in the past few years to learn a lot about good roofing waterproofing practices according to the national roofers association. They don't agree that caulk works as the primary means of sealant, which is what you are doing with an L foot. And given that we have really good off the shelf approved flashed feet, why would you use anything else? My 2 cents, Jay peltz power On Jun 29, 2012, at 5:16 AM, Glenn Burt wrote: We have used a variety of sealants over the years, and determined simple Henry roofing cement is the best product for use on comp roofing. We also used to bend our own L-foot flashing, which we cut from standard Al coil stock (before all the manufactured options were available). This might be a good option for you in this case. Glenn From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Drake Sent: Thursday, June 28, 2012 6:40 PM To: RE-wrenches Subject: [RE-wrenches] L feet no flashing in shingle roof I'm quoting a job that has an existing array with L feet bolted down to a shingle roof with no flashings. I want to match the height of the existing array. Also some modules are being worked in around skylights where it is unlikely that room would be available for flashings to center over rafters. I've always used flashings. Would it be completely crazy to follow suit of the existing array and bolt L feet straight to the shingle roof with good roof sealant? If so, how would you seal it? Thanks, Drake Drake Chamberlin ATHENS ELECTRIC LLC OH License 44810 CO license 3773 NABCEP Certified PV ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org Drake Chamberlin ATHENS ELECTRIC LLC OH License 44810 CO license 3773 NABCEP Certified PV ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re
Re: [RE-wrenches] Solar Carports at Hotel
Does anyone have a name of a Hotel that has installed Solar on a carport? I need to build a list for a client. Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Home Depot solar?
We sold for Home Depot (actually through HD for Astropower in 2000- 2001 in the Palm Springs area. It lasted about a year before they started shopping install labor - then it fell apart with competitors slinging lowball prices to get the work. Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 From: wire...@gmail.com wire...@gmail.com To: Solar Energy Solutions solarenergysoluti...@yahoo.com; RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Thursday, September 29, 2011 9:40 AM Subject: Re: [RE-wrenches] Home Depot solar? Andrew, Koyaanisqatsi is also a great movie by Francis Ford Copolla. You should all see it. It's been awhile since I've seen it but if I remember correctly it's a Hopi Indian term meaning once we start digging from the earth, we're screwed beyond repair. Larry Liesner Design and Installations Elektron Solar, LLC 49 Richmondville Ave Suite 107 Westport, CT 06880 203-557-3127 (office) 203-644-2404 (cell) 203-549-0977 (fax) wire...@gmail.com On Thu, Sep 29, 2011 at 12:31 PM, Solar Energy Solutions solarenergysoluti...@yahoo.com wrote: Home Depot IS selling PV in Portland Oregon through Solar City. Seirrabuton Club is marketing PV to their members in Oregon. They have chosen a single contractor for the entire state to install all of their member's systems. Payola is $300.00/system installed. Andrew Koyaanisqatsi President Solar Energy Solutions, Inc. Since 1987, Moving Portland and Beyond to an Environmentally Sustainable Future. 503-238-4502 www.solarenergyoregon.com Better one's House too little one day than too big all the Year after. From: Jason Szumlanski ja...@fafcosolar.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Thursday, September 29, 2011 8:17 AM Subject: Re: [RE-wrenches] Home Depot solar? We were recently asked to fix a royal mess by a SDHW installer contracted via Home Depot. Not fun. 60+ systems with various deficiencies. The installer was to blame, not HD. HD is not selling PV in our market (fortunately). Jason Szumlanski -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Jesse Dahl Sent: Thursday, September 29, 2011 10:39 AM To: RE-wrenches Subject: [RE-wrenches] Home Depot solar? Anyone out there have any experience with Home Depot's solar installers? Jesse ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org NABCEP Certified PV Installer (# 032611-184) ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Underwater wire
Kris, I worked traffic signal systems for years, we spliced conductors in pull boxes that fill with water on a regular regular basis. There are products available that are rated for waterproofing connections and the THWN-2 is rated for wet locations, but I don't know about submersed locations. Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 From: Allan Sindelar al...@positiveenergysolar.com To: re-wrenches@lists.re-wrenches.org Sent: Thu, June 9, 2011 6:48:32 PM Subject: Re: [RE-wrenches] Underwater wire Kris, I don't know a Code-compliant solution, having not faced this. But I'll suggest that you not attempt to glue and seal conduit to keep the conductors dry, as it won't work permanently. Use wet-rated wire, expecting any conduit to provide only physical protection. THWN is wet-rated - that's the W. You might consider submersible pump cable also. Allan Allan Sindelar al...@positiveenergysolar.com NABCEP Certified Photovoltaic Installer NABCEP Certified Technical Sales Professional New Mexico EE98J Journeyman Electrician Positive Energy, Inc. 3201 Calle Marie Santa Fe, New Mexico 87507 505 424-1112 www.positiveenergysolar.com On 6/9/2011 7:31 PM, Jesse Dahl wrote: There utility companies up here in northern MN bring power to islands all the time. The have cable underwater. Maybe contact Minnesota Power Jesse Sent from my iPhone On Jun 9, 2011, at 3:48 PM, Nathan Jones solardud...@yahoo.com wrote: Kris, We work on boat docks on army corps of engineer lakes frequently and they have wire in direct contact with water everywhere. The lakes here are flood control and fluctuate a lot, like 50 feet in a given year. The marinas are dragging the feeder wires all over the place on rocky bottoms. We kill very few people with this insane practice but as the feeder wires age I believe the fatalities will increase. This is ground referenced service in fresh water with poor conducting capability in the water. Very dangerous yet allowed. Your situation would be quite safe IMHO as there would be no stressing of the delivery system. Nathan Jones Power Source Solar 417-827-0738 On Thu Jun 9th, 2011 2:30 PM CDT Kristopher Schmid wrote: I have an installation that is a ground mount on a berm with a man-made pond between the array and the BOS. The pond is about 4 feet deep. How would you wrenches make this run? in weighted conduit with primer and glued joints? use boring and go under? out of conduit with wire directly in the water? Does code have anything to say about this specifically? Thanks as always. -- Thanks, Kris Schmid Legacy Solar, LLC 864 Clam Falls Trail Frederic, WI 54837 715-653-4295 www.legacysolar.com sol...@legacysolar.com ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] balasted racks
Sollega, cheap and easy.. Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 From: David Katz dk...@asis.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Sat, April 16, 2011 10:52:24 PM Subject: Re: [RE-wrenches] balasted racks My favorite is AET. David David Katz David Katz Founder CTO AEE Solar T(707) 825-1200 C(831) 325-9582 F(707) 825-1202 dk...@aeesolar.com www.aeesolar.com On 4/16/2011 8:38 PM, Nick Vida wrote hey wrenches. i am looking at some ballasted racks. Any favorites or least favorites? trifling experiences? i would appreciate hearing from you! thanks, nick vida ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] 690.4 (B) ???
Kirk, we put a 4x4 gutter under the equipment (inverters, disconnects, AC and DC, if not using an Inverter with the DC disc integrated) it looks neater and then you tie wrap the DC together And AC together in the gutter. 3/4 inch conduit risers to the equipment from the gutter and you have a neat looking install that meets code. If the gutter can extend under the service panel it works even better (out the back of the gutter into the wall and up into the service panel) If you want pictures, e-mail me direct... Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 From: conrad geyser conr...@cape.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Sat, April 9, 2011 7:24:49 PM Subject: Re: [RE-wrenches] 690.4 (B) ??? Kirk, Just zip tie your DC stuff together and your AC stuff together and keep the two bundles separate. Then they can be in the same trough. At least that's the way we do it. I don't know about in the same conduit, I'd guess no. Conrad Cotuit Solar -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kirk Herander, VSE Sent: Saturday, April 09, 2011 9:29 PM To: k...@vtsolar.com; 'RE-wrenches' Subject: Re: [RE-wrenches] 690.4 (B) ??? PS Does this merely mean that conductors from more than one source must be bundled(connected) together, but are allowed in the same conduit? Kirk Herander Vermont Solar Engineering 802.863.1202 NABCEP(tm) Certified Solar Installer NYSERDA-eligible Installer VT Solar Incentive Program Partner -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Kirk Herander, VSE Sent: Saturday, April 09, 2011 9:10 PM To: 'RE-wrenches' Subject: [RE-wrenches] 690.4 (B) ??? 2008 NEC states that: (B) Conductors of Different Systems. Photovoltaic source circuits and photovoltaic output circuits shall not be contained in the same raceway, cable tray, cable, outlet box, junction box, or similar fitting as feeders or branch circuits of other systems, unless the conductors of the different systems are separated by a partition or are connected together. Can anyone describe and give an example of what connected together means to inverter PV circuits in the same conduit as a branch (load) circuit? I have a single existing PVC conduit to a barn with an AC load subpanel. I want to run the output conductors of an inverter combiner panel in the barn through the same conduit to get to be main building. The fill / derating calcs work to do this. The inspector says I have to run a new conduit for the AC inverter combiner because the subpanel feeder and the combiner output conductors are not connected. But they are both connected to the main building panel. Any insight will be appreciated. Thanks. I've also been told that the NEC 2011 comments on 690.4 (B) clarify this. Can anyone comment? Obviously I am not mixing DC and AC conductors. Kirk Herander Vermont Solar Engineering 802.863.1202 NABCEP(tm) Certified Solar Installer NYSERDA-eligible Installer VT Solar Incentive Program Partner ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] SLDs with Mac
I've got Parallels on my iMac also - yes it's too clunky to be useful. Draftsight is working out great for Cad Dwgs on the Mac, and, again, it's a free download... Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 From: R Ray Walters r...@solarray.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Sat, April 9, 2011 9:42:02 PM Subject: Re: [RE-wrenches] SLDs with Mac I've been running Parallels on a Mac for 3 years, and I just bought a PC for the PC stuff. I like my Mac, but after waiting 1/2 an hour to boot and update everything each time, Parallels is just really clunky. I like Omnigraffle on my Mac. way better than simpler drawing programs, but not near as complicated as AutoCad. I consider it optimal for one line diagrams and simple layout stuff. Its quick to use. R. Walters r...@solarray.com Solar Engineer On Apr 9, 2011, at 10:40 AM, Dave Click wrote: Nick, you can still use Visio/AutoCAD on the Mac if you install Parallels or VMWare, which allow you to run Windows programs. Either of those would run you about $80, which is cheaper than OmniGraffle. Each of these three software packages have trial versions so you can check them out before you commit. On 2011/4/8 7:55 PM, Nick Soleil wrote: Hello Mac Users: I have been using Visio Professional for my Single Line Diagrams, but am considering a change to Mac. Can I open or edit Visio diagrams with any Mac applications? Probably not. What programs are available for generating electrical diagrams? Have you used OmniGraffle? It seems really user friendly. What about AutoCAD for Mac? Nick Soleil 707-321-2937 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] SLDs with Mac
Hi Nick, Ive been doing drawings in AutoCad for years, even though I have a IMac pro, I've used my 17 PC laptop for all my cad drawing. I recently discovered Draftsight, a 2 and 3D drawing program that's very similar to AutoCad and it has a Mac version. The best part is that it was a free download I've just started using it on my Mac and so far so good. here's the link: http://www.3ds.com/products/draftsight/free-cad-software/ Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 From: Nick Soleil nicksoleilso...@yahoo.com To: re-wrenches@lists.re-wrenches.org Sent: Fri, April 8, 2011 4:55:01 PM Subject: [RE-wrenches] SLDs with Mac Hello Mac Users: I have been using Visio Professional for my Single Line Diagrams, but am considering a change to Mac. Can I open or edit Visio diagrams with any Mac applications? Probably not. What programs are available for generating electrical diagrams? Have you used OmniGraffle? It seems really user friendly. What about AutoCAD for Mac? Nick Soleil 707-321-2937 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Arc flash concerns
Jeff, excellent advice. Even seasoned electricians are negligent in this area. We've done lots of large commercial electrical installations over the years and a rule that was strictly enforced over the years in our shop was to stand to the side and look to the side when operating breakers. On the larger breakers we stand to the side and use a 2x4. On one occasion a few years ago we had a 2000 amp breaker in a stand up panel blow when energized. Had the electrician been standing in front of the breaker he would have no doubt died. Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 From: Jeff Yago jry...@netscape.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Tue, August 31, 2010 7:24:57 PM Subject: Re: [RE-wrenches] Arc flash concerns First, I am not talking about NEC requirements for arc fault circuit breakers in bedrooms! I hope those on the list who are licensed electricians are very familiar with the safety issues of an arc flash but I have run into many pv installers who do not have a clue, and believe as long as the breaker they are working on is disconnected there is no danger when working with the panel energized. This is a VERY dangerous problem and it can happen on brand new or old electrical switchgear. An arc flash starts with something across the buss bars of a breaker panel or from a buss to ground. What is hard to understand is this is not a true short circuit and will NOT trip any circuit breaker. This makes it very dangerous when working on any energized panel. It starts with any small or poor conductor across the phases or buss bars. This could be anything from a fine wire, a dead lizard, rust falling off the interior when you slam the door closed, filings from drilling a hole in the panel side, or even removing or installing a new or old circuit breaker even if it is not connected to any load. This is just enough contact to allow an arc to form, and as soon as the arc forms it goes into melt down which produces 35,000 degree temperatures and blows plasma of vaporized copper out the front of the enclosure. Having been near one I can tell you the sound is like holding a 12 ga. shot gun next to your ear. Starting in 2004 the NEC started requiring arc flash studies and labeling on all electrical panels in all non-residential facilities. Most likely if you run into one of these panels there will be a label on the door saying the arch flash safe distance rating of this panel is 6 feet and indicate that arc flash protective clothing must used before touching this panel. Any commercial building owner who does not comply with these new regulations can face criminal prosecution if somebody gets fried. The safe way to approach any circuit breaker panel is to stand to the hinge side of the door as you open it, and not stand directly in front as most people do. This will deflect the high temperature plasma away from your face if it happens. Here are several short YouTube videos, one of a security camera view of two licensed electricians doing normal maintenance on new switchgear. One guy is standing in front of a new large circuit breaker that he is cranking into position. Later analysis indicated one of the rear pins was bent, and as he cranked he was deforming it sideways towards the ground buss. This new breaker was not connected to any load. Let me say that again, there was no load and no current passing through this circuit breaker. Since an arc has resistance, it allows enough amps to maintain the arc, but not enough amps to trip the breakers, which is why this will continue to burn and not trip anything. Also, this may cascade back through multiple sub-panels as their can be enough impedance in a long cable between a main and sub panel to hold down the amps below the trip rating of the next breaker up the line. Regardless of what you hear, this is not just a high voltage issue, and definitely is a concern down to 208 volts AC which puts it into the normal range of a residential 120/240 VAC main panel. If you are adding or removing a breaker in an existing panel to connect a new inverter, please make sure the panel is de-energized and wear approved arc flash gear! Jeff Yago, DTI Solar http://www.youtube.com/watch?v=m3_ear4k-Jg http://www.youtube.com/watch?v=-iClXrd50Z8feature=related http://www.youtube.com/watch?v=AFlBLQjOAJIfeature=related Netscape. Just the Net You Need.___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org
Re: [RE-wrenches] Tight roof layout questions: edge walkway requirements small gap hardware options
Mick, here in California the fire department in the various agencies has the final say on clearances. There is a very clear cut standard in place for the state, but we have been successful a few times in getting allowances to vary due to various site conditions. A call to the local AHJ is the place to start. In the early days of our installations (mid 1990's) we used power strut and bolted panels directly to the rails. A lot slower but no gaps between panels. We went from there to designing our own T clamps. There wasn't as many choices then for mounting hardware. Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 From: Brian Teitelbaum bteitelb...@aeesolar.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Wed, August 25, 2010 11:40:04 AM Subject: Re: [RE-wrenches] Tight roof layout questions: edge walkway requirements small gap hardware options Hi Mick, To answer part of your post, the DPW Power Rail mid-clamps give you a 3/8” gap between modules, and the SnapNrack mids give you a 1/2 gap. I doubt if that will give you much of a walkway though…. Brian Teitelbaum AEE Solar From:re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Mick Abraham Sent: Wednesday, August 25, 2010 11:09 AM To: RE-wrenches Subject: [RE-wrenches] Tight roof layout questions: edge walkway requirements small gap hardware options Hello, Team~ I'm laying out some Sanyo modules on paper. Twelve of them fit the roof with almost too much perfection: this would be difficult to install as it would fill the roof edge to edge in both directions. Are there consistent guidelines about the amount of roof edge which must remain uncluttered or is this mainly driven by the amount of aggravation that the installer is willing to tolerate? Which organizations would want to influence such decisions in the Atlanta region? Details are: residential, new construction, wooden truss type roof framing, finish roofing yet to be decided. I've seen fancy photos of rooftops which are covered edge to edge, but I suppose those are building integrated PV systems instead of discrete modules mounted above the roofing material. Who decides if those are OK' for no walkways compared to a roof that is fully loaded with Sanyo type modules? How are such decisions made? I like the top clamp style mounts but UniRac SolarMount rail systems need about a 1 gap from one module to the next. Is there anyone with similar hardware that can get a grip within a smaller gap? Thanks in advance, Mick Abraham, Proprietor www.abrahamsolar.com Voice: 970-731-4675___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Padded equipment cases.
I spent years in the movie industry - Anvil or Pelican is all we ever used, can't beat em. Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 From: d...@foxfire-energy.com d...@foxfire-energy.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Fri, August 13, 2010 3:30:51 AM Subject: Re: [RE-wrenches] Padded equipment cases. I like pelican: http://www.pelican-case.com/ Dan Brown Foxfire Energy Corp. Renewable Energy Systems (802)-483-2564 www.Foxfire-Energy.com NABCEP #092907-44 Original Message Subject: Re: [RE-wrenches] Padded equipment cases. From: Kent Osterberg k...@coveoregon.com Date: Fri, August 13, 2010 12:27 am To: RE-wrenches re-wrenches@lists.re-wrenches.org Years ago, I used to get custom cases made by Silton Company. They are now owned by Olympic Case Company but the facility in Fresno is still in use. Kent Osterberg Blue Mountain Solar Peter Parrish wrote: I seem to remember reading about a source of custom padded equipment cases, but can't remember when and where I did so. What I am talking about is a sturdy (e.g. Al) case with closed cell foam in the top and bottom halves and then a third inner 2 or 3 layer of foam with cutouts for sensitive equipment. I am thinking of our DayStar irradiance meter, our SunEye, DMM, IR thermometer, clamp-on ammeter, digital camera and the like. I am not interested in buying a kit. I would like to specify the outlines for each piece of equipment and have the cutouts done in a professional manner. Has anyone ordered one or know of a source? - Peter Peter T. Parrish, Ph.D., President California Solar Engineering, Inc. 820 Cynthia Ave., Los Angeles, CA 90065 CA Lic. 854779, NABCEP Cert. 031806-26 peter.parr...@calsolareng.com Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885 ___ ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Best practices for mounting on cedar shake roof?
I love that idea. We've been using the prosolar 3.5 in standoffs and the Oatley flashing on comp shingles, then then roofing up to the array with tile, or shake, or what ever the existing roof was, But the standing seam would give the array a much lower profile. In the early days before all the fancy mounting hardware we used power strut a rod hangers to keep a low profile. We'd been using it for years on commercial roofs to hold a myriad of equipment. we just finished a system in a very large So Cal HOA that has, and requires shake to be used on any re roof. I'm going to use standing seam and the S-5 clamps on the next one. Thanks Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 From: Glenn Burt glenn.b...@glbcc.com To: Aladdin Solar cpick...@aladdinsolar.com; RE-wrenches re-wrenches@lists.re-wrenches.org; Dana d...@solarwork.com Sent: Wed, July 14, 2010 10:49:49 AM Subject: Re: [RE-wrenches] Best practices for mounting on cedar shake roof? We have done something similar when slate roofs are involved – replace the slate directly under the array with comp shingles. -Glenn From:re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Aladdin Solar Sent: Wednesday, July 14, 2010 1:35 PM To: Dana; 'RE-wrenches' Subject: Re: [RE-wrenches] Best practices for mounting on cedar shake roof? That seems like a great idea! And some sort of flashing on the low end where the metal roof ends and the shakes start...? --Charlie - Original Message - From:Dana To:'Aladdin Solar' ; 'RE-wrenches' Sent:Wednesday, July 14, 2010 12:14 PM Subject:RE: [RE-wrenches] Best practices for mounting on cedar shake roof? We have integrated a standing seam roof under the array area with the shake as a trim and keeping with the “look”, and used S-5 clips to attach the array rails to the metal roof. Thanks, Dana Orzel Great Solar Works, Inc E - d...@solarwork.com V - 970.626.5253 F - 970.626.4140 C - 970.209.4076 web - www.solarwork.com Responsible Technologies for Responsible People since 1988 From:re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Aladdin Solar Sent: Wednesday, July 14, 2010 11:01 AM To: re-wrenches@lists.re-wrenches.org Subject: [RE-wrenches] Best practices for mounting on cedar shake roof? Is it possible to do a weather-tight install on a cedar (or other) shake roof in snow country with wide temperature and moisture ranges? We usually use QuickMount or SnapNRack flashed mounting points on composition roofs. I can't imagine a really reliable way to go through cedar shakes and keep moisture out of the penetration. --Charlie No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.830 / Virus Database: 271.1.1/3003 - Release Date: 07/14/10 00:36:00 __ Information from ESET NOD32 Antivirus, version of virus signature database 5278 (20100714) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Oceanlink
Does anyone have any experience with the Oceanlink Energy Solution power conditioners. They claim up to 35% energy savings on a normal residential installation. They are a little more sophisticated that the power save units we have used in the past Max Balchowsky Design Engineer SEE Systems 1048 Irvine Ave Suite 217 Newport Beach, Ca. 92660 760-403-6810 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] required inverter and system testing
Hi Greg, we've done a lot of Gov't, Public Works stuff over the years. Be very detailed with your list of inclusions and exclusions and stay away from the power performance guarantees Your company should be the one to define Prime Solar Conditions. I'd have a line item in your bid to cover the cost of all the testing and itemize your bid as much as possible so they know what they are getting in your bid and can compare it to your competition.. Max Balchowsky SEE Systems 1048 Irvine Ave, Suite 217 Newport Beach, Ca. 92660 From: Greg Egan g...@remotepowerinc.com To: re-wrenches@lists.re-wrenches.org Sent: Wed, May 5, 2010 8:21:28 AM Subject: [RE-wrenches] required inverter and system testing Esteemed Wrenches, I'm in the process of bidding a small government job. They're requiring the following tests. I was wondering if any of you have ever run across this before and if so how you went about it. - Inspect inverters according to requirements in NETA Acceptance Testing Specifications. - Test the PV system under prime solar design conditions to validate system power performance rating.Use instruments calibrated within the previous six months according to NIST standards. (not easy since the site they've chosen will shade some of the array all the time. I should be able to just explain this to them) - Simulate malfunctions, including ground faults, to verify protective device operation. (I would create a GF and then replace the fuse for this test) - Test anti-islanding shutdown function due to normal utility source failure, time delay and automatic restart after utility power restoration. (this is an easy one) - Test and record the total harmonic distortion (THD) content of output current at 25, 50, and 100 percent of system rating. Comply with IEEE 519 at MDP point of connection. - Test and record the real power output for each inverter, and total power delivered at the grid tie connection, for a 24 hour period. The continuous power output during prime solar conditions shall meet or exceed performance requirement under part I of this specification. - For each inverter, record DC input voltage for 24 hours, to demonstrate affects of maximum power point tracking (MPPT), voltage regulation within inverter rated limits, and affect of partial shading on solar modules. Simulate partial shading by covering 50% of modules during prime solar conditions. - Record of Tests and Inspections:Prepare and submit documentation of tests and inspections, including references to manufacturers' written instructions and other test and inspection criteria. Include results of tests, inspections, and retests. Any advice would be gratefully accepted and appreciated! Best, Greg Egan NABCEP Certified PV Installer Remote Power Inc. Fairbanks, AK -- Greg Egan Remote Power Inc. 981 Gold Mine Trail Fairbanks, AK 99712 P. 907.457.4299 U.S.Distributor for Outback Power Systems and other premium power equipment.___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Lags Trusses
When we talked to a manufacturer they wanted us to put supporting lumber on top of the roof to support the array rather than penetrate the truss with a lag bolt every 4'. We tried to get them to accept a drill through and a bolt with a fender washer. We abandoned the project. Max Balchowsky SEE Systems 1048 Irvine Ave Suite 217 Newport Beach Ca. 92660 760-403-6810 - Original Message From: Richard L Ratico richard.l.rat...@valley.net To: re-wrenches@lists.re-wrenches.org Sent: Tue, April 27, 2010 7:27:08 AM Subject: Re: [RE-wrenches] Lags Trusses Wow, this could be a hairball. Needless to say, we've all probably already done this, more than a few times. Butas a former carpenter though claiming no expert truss knowledge, my sense is that the top chord of the trusses should be in compression. Therefore, a 3/8 diameter lag, for instance, would substitute steel for wood in compression, not a bad move. The trusses should be very well braced laterally by the roof deck. I don't see the problem. Is the new roofing material being applied over existing roofing, applying additional load? Are there circumstances that make this a special truss application, cantilevers, slate roofing, etc.? It would be interesting to talk directly with the manufacturer, to get their entire scoop on the project. It may be an overly-cautious approach to liability concerns. If starting from scratch, the truss manufacturer should be able to design for whatever the application requires. Sistering boards to their trusses might easily freak them out as well. Ask them what they would suggest. There are lots of truss manufacturers if this one can't handle the job. Dick Ratico Solarwind Electric --- You wrote: Hello Wrenches, I just talked to a carpenter, who we are installing an array for. He is putting a new roof on the building and was talking to the manufacturer of the trusses. He mentioned that he was having an array installed on the roof. The truss manufacturer said there were problems with weakening the truss structure with the lag screw penetrations. We are now planning to sister boards next to his trusses instead of penetrating them. Does this seem like a potential issue? Is there any data on this? Thanks, Drake Drake Chamberlin Athens Electric OH License 44810 CO License 3773 NABCEP TM Certified PV Installer Office - 740-448-7328 Mobile - 740-856-9648 ___ List sponsored by Home Power magazine --- end of quote --- ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Volcanos, reduced solar production and kWh performance warranties
We've had a lot of people asking about performance warranties and I stay very far away from any language that hints at a performance guarantee. I think this especially important in the PPA I give them all the product specifications, run the production charts and then explain how little control I have over the things that affect output (to the grid) which includes weather and the way they use electricity. Max Balchowsky SEE Systems 1048 Irvine Ave. Suite 217 Newport, Beach Ca. 92660 760-403-6810 From: Marco Mangelsdorf ma...@pvthawaii.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Sun, April 25, 2010 8:02:58 PM Subject: [RE-wrenches] Volcanos, reduced solar production and kWh performance This thread brings up a very timely issue that I’m dealing with right now with PV Power Purchase Providers. As an integrator providing turnkey PV systems of X kW, I’m being asked to contractually agree to a minimum performance warranty for said PV systems. I am EXTREMELY uncomfortable to any such clause in any contract that I would sign. I have strong confidence in my PV design capabilities and engineering support and in my professional crew to install a top-quality PV system. I have a lot less confidence in an inverter manufacturer being able to get to a site on a Hawaiian island in the middle of the Pacific in a super timely fashion as the lost PVkWhs rack up. And as I mentioned in a previous post today, we have an active volcano here that’s been spewing since 1983, a volcano that could get a lot worse on any given day. I’m leaning strongly against agreeing to any such clause. Way too bad a precedent to set. Way too much of a liability. Anyone else had to deal with this bugger of a performance warranty demand? Thanks, marco ProVision Solar Marco: Our production schedule has been in tatters - lowered by perhaps 30% because of the rain can't plan, can't do. Then I pay overtime on good days to (try to) catch up. We have a number of systems online and I had not thought to actually review and compare from this year to last. I'll let ya know. We'll get a call like - My bill is higher than last year (edison has a bar graph of monthly consumption for the past 13 months) and I'd like you to look at my system or My meter is not going backwards, should I call edison? The weather is so consistently wet this winter (think Hilo) that we usually just need to ask- Been outside lately? But everywhere is so green and the desert bloom is outrageous. http://www.desertusa.com/wildflo/ca.html Pat Redgate Ameco Solar In a message dated 4/25/2010 12:24:53 P.M. Pacific Daylight Time, ma...@pvthawaii.com writes: Pat, Kicked your butts as far as lower output? If so, by how much on a percentage basis? On the Big Island of Hawaii, we’ve had a very active volcano doing its thing since 1983. With the normal trade winds, the vog (volcanic smoke + fog) gets blown south past the volcano, around the south tip of the island and then back up along the west side of the island. Which means that Kona-side residents can be in a yucky vog zone for days and sometimes longer. Think L.A. on a smoggy summer day. And as far as percentage decrease in solar output, I really have little accurate clue. Marco ProVision Solar Kicked out butts, in fact. Pat Redgate Ameco Solar No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.814 / Virus Database: 271.1.1/2833 - Release Date: 04/24/10 20:31:00___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Need NT185U1 Sharp module
Need to replace a module damaged by a golf ball strike, NT185U1. Anyone know where I can find one, I know sharp has a NT175 U1 mono in the same frame size, but I'd like to find a 185 somewhere.. Thanks, Max Balchowsky SEE Systems 1436 Irvine Ave Newport Beach, Ca.92660 760-403-6810 List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] DC disconnects
We've been successful (at least with PVPowered inverters) in having the AC/DC disconnects in the inverter recognized as the required lockable disc in some jurisdictions. The PVPowered on, off, AC, DC switch is lockable. Just keep it close to the utility meter. From: Rebecca Lundberg rebecca.lundb...@powerfullygreen.com To: re-wrenches@lists.re-wrenches.org Sent: Mon, January 11, 2010 3:54:52 PM Subject: Re: [RE-wrenches] DC disconnects In response to this: Luckily the latest inverters from most manufacturers take care of this need with their included/integrated but seperated fused DC disconnects. I actually wish the integrated disconnects for the new inverters were an option when purchasing, i.e. when I order the inverter it comes with it automatically, and is therefore reflected in the price. Where I live the AHJ and utlities are requiring the handled-lockable-'regular' AC and DC disconnects regardless of whether or not there is a UL-listed integrated disconnect with the inverter. Alas, for me it is redundancy and extra cost for materials and electrical work either way. I can either have the electrician wire it up and pay their cost, or I can leave the integrated inverter out (when it is listed as optional in the installation manual) but now I have a non-returnable part sitting around, which is wasteful too. Alas, the best solution is more solar so everyone becomes more familiar with it! Keep Shining! Rebecca Lundberg Powerfully Green, Minnesota ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Evergreen Panels
Does any one know wher I can get 14 Kw of Evergreen 200's? Max Balchowsky SEE Systems 760-403-6810 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Good distributor for Exletech products
We've always dealt direct with Exeltech Max Balchowsky SEE Systems 760-403-6810 From: Allan Sindelar al...@positiveenergysolar.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Mon, November 30, 2009 8:15:03 PM Subject: Re: [RE-wrenches] Good distributor for Exletech products Message Either AEE or you can purchase from Exeltech direct. Conergy can’t handle special orders/drop ships etc. very well anymore. They have recently dropped all water pumping, all wind, all thermal, and all ETL-listed system preassemblies. Allan Sindelar al...@positiveenergysolar.com NABCEP Certified Photovoltaic Installer EE98J Journeyman Electrician Positive Energy, Inc. 3201 Calle Marie Santa Fe, New Mexico 87507 505 424-1112 www.PositiveEnergySolar.com Anyone have a suggestion other then Conergy that still deals w/ Exletech inverters? Thanks in advance TUMP___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Exeltech Inverters
I, too, have had some experience with Exeltech. I think it's an excellent product and the installs I've done have been trouble free. It's a little on the pricey side but an excellent system. I liked the fact that everything is rack mounted. Max Balchowsky SEE Systems 760-403-6810 From: Kurt Albershardt i...@es-ee.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Sat, November 14, 2009 10:14:15 AM Subject: Re: [RE-wrenches] Exeltech Inverters I can not speak to their grid tie product (which they have been trying to get out the door for almost a decade now) but their XP MX lines have served well over the years and Exeltech has always been a good company to deal with and has stood behind what they sold. I notice a new module back inverter on their site http://www.exeltech.com/pvacproduct.htm On Nov 11, 2009, at 9:00 , wind...@wind-sun.com wrote: I would add the new Exeltech grid tie inverter to that question. I see their ad in the latest HP magazine, but no info on their website about them, and no distributor seems to know much about them. .. Northern Arizona Wind Sun - Electricity From The Sun Since 1979 Solar Discussion Forum: http://www.wind-sun.com/ForumVB/ .. - Original Message - From: William Miller To: RE-wrenches Sent: Wednesday, November 11, 2009 8:53 AM Subject: [RE-wrenches] Aurora Inverters Friends: Does anyone here have any experience with the Aurora inverters? I visited their booth in Anaheim and was impressed with some of the features: Made in Camarillo, CA, near the Solar World plant. Dual MPPT inputs 90 to 500 VDC input window. Transformerless (or balanced, as we would say in broadcasting) inputs Nema 4 case. Up to 97% efficient I am particularly intrigued with the Transformerless input. This, IMHO is a much safer scheme. Prior to a ground fault, no polarity is referenced to ground, reducing shock hazard significantly. Any ground fault only references one side of the circuit to the racking and metallic structures. I'd like to know more. William Miller Please note new e-mail address and domain: William Miller Miller Solar Voice :805-438-5600 Fax: 805-438-4607 email: will...@millersolar.com http://millersolar.com/ Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Astropower 110
---Have a job (install almost 10 yrs ago) and need 2 Astropower 110 watt modules. Any of those laying around? Max Balchowsky SEE Systems ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Rooftop wiring methods between multiple subarrays
Bill, as you know, if the array is on a tilted roof (tile track bkts or fast jacks) and the array is monolithic, all the wires go directly from under the panels to the junction box ( I mis-spoke when I said Combiner box, I too don't see the need for combiner boxes on residential systems ).We go directly from the weeb ground lug into the junction box then down. The panels are bonded to the rails with the Weeb Bonding Clips. If the array consists of tilted rows, we've used either a bare copper wire tie wrapped to the EMT between rows or run in the EMT (most rows are 18-24 apart depending on angle). What I've done on the last couple of tilted row residential jobs is used the mineralac clamps and EMT between rows (inspector has bought it as a bond between rows then used the ground lug on the last row to take the ground into the junction box and down.. Max From: Bill Brooks billbroo...@yahoo.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Tuesday, October 13, 2009 7:59:13 AM Subject: Re: [RE-wrenches] Rooftop wiring methods between multiple subarrays Max, I’m not sure I understand your scenario completely. The WEEB-Lug, superior to the ILSCO product, is intended for grounding the rack to the equipment grounding conductor. Each rail gets a WEEB-Lug and an EGC ties all those rails together and takes the ground to the j-box to enter the conduit system (don’t like combiner boxes on residential rooftops). The key is how to effectively bond metal conduit. Bonding bushings or box fittings are the only means I know of to do this. As others have pointed out, the bushings currently on the market are often not designed for outdoor use. This is particularly of concern in high corrosion areas (where EMT is not recommended). My experience is that it is better to bond with indoor lugs than not to bond at all. When I check old lugs in the field with cad-plated set screws, they often still have a good bond even though the screw is fully rusted. The key is the bond between the conductor and the lug, and the between the lug and the metal it is attached to. If both surfaces are tight and no oxygen is getting to the interfaces, the bond will stay for a very long time—possibly the life of the system in a lower corrosion environment. The set screw is mechanical pressure, not the bonding point—rust locks it.. It is best to use outdoor-rated equipment, but in some cases, it may be impossible because the equipment may not be manufactured, since the market is too small. Oh the joys of exterior wiring. Bill. From:re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Max Balchowsky Sent: Monday, October 12, 2009 6:05 PM To: RE-wrenches Subject: Re: [RE-wrenches] Rooftop wiring methods between multiple subarrays Bill, what about using the weeb bonding method for the panels, conduit between sub arrays with mineralac clamps and then the weeb grounding lug for the ground wire to the combiner box and then home to the panel. The only time this has been an issue is where the jurisdiction doesn't accept the Wiley product. (I never liked what the sun does to PVC conduit) Max Balchowsky SEE Systems 760-403-6810 From:Bill Brooks billbroo...@yahoo.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Friday, October 9, 2009 10:20:19 AM Subject: Re: [RE-wrenches] Rooftop wiring methods between multiple subarrays August and Max, If all you are doing in supporting the conductors, PVC conduit is sufficient with protective bushings on each end. Once you go to EMT, then grounding bushings must be installed at both ends and the EGC needs to pick up those bushings. More expensive and time consuming, but it looks better and you can span a greater distance. Bill. From:re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Max Balchowsky Sent: Thursday, October 08, 2009 8:29 PM To: RE-wrenches Subject: Re: [RE-wrenches] Rooftop wiring methods between multiple subarrays August - we've been using 1/2 emt between arrays with plastic bushings to protect wires and a dual minerallac clamps ( http://minerallac.thomasnet.com/viewitems/pipe-fasteners/ll-categories-cully-pipe-fasteners-conduit-hangers?bc=100%7C1006%7C1281forward=1) to tie the conduits to the riser on the array support. Has worked well over the years and the inspectors like the bond between the arrays. From:August Goers aug...@luminalt.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Thursday, October 8, 2009 11:07:08 AM Subject: [RE-wrenches] Rooftop wiring methods between multiple subarrays Hi Wrenches, I’m looking for fresh ideas on how to run USE-2 wires between subarrays on rooftops. Let’s say we have a flat roof commercial system with dozens of separate rows of modules. How would you folks
Re: [RE-wrenches] Rooftop wiring methods between multiple subarrays
If your talking about conduit runs between arrays, we've always used minerallac clamps to attach to either the riser, or the frame, depending on the tilt angle and accessibility. The inspector has always accepted this as bonding between arrays. Max Balchowsky SEE Systems 760-403-6810 From: Drake Chamberlin drake.chamber...@redwoodalliance.org To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Sunday, October 11, 2009 7:38:28 AM Subject: Re: [RE-wrenches] Rooftop wiring methods between multiple subarrays At 02:35 PM 10/10/2009, you wrote: . How do we bond both ends of the conduit? How about using a water pipe clamps on the EMT. A bare copper, # 6 or larger, should be able to be run outside the conduit, as it is a bond between sub arrays. My reading is that, from the combiner box on, an equipment grounding conductor would need to be inside the conduit. Drake Chamberlin Athens Electric OH License 44810 CO License 3773 NABCEP TM Certified PV Installer Office - 740-448-7328 Mobile - 740-856-9648 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Rooftop wiring methods between multiple subarrays
Bill, what about using the weeb bonding method for the panels, conduit between sub arrays with mineralac clamps and then the weeb grounding lug for the ground wire to the combiner box and then home to the panel. The only time this has been an issue is where the jurisdiction doesn't accept the Wiley product. (I never liked what the sun does to PVC conduit) Max Balchowsky SEE Systems 760-403-6810 From: Bill Brooks billbroo...@yahoo.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Friday, October 9, 2009 10:20:19 AM Subject: Re: [RE-wrenches] Rooftop wiring methods between multiple subarrays August and Max, If all you are doing in supporting the conductors, PVC conduit is sufficient with protective bushings on each end. Once you go to EMT, then grounding bushings must be installed at both ends and the EGC needs to pick up those bushings. More expensive and time consuming, but it looks better and you can span a greater distance. Bill. From:re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Max Balchowsky Sent: Thursday, October 08, 2009 8:29 PM To: RE-wrenches Subject: Re: [RE-wrenches] Rooftop wiring methods between multiple subarrays August - we've been using 1/2 emt between arrays with plastic bushings to protect wires and a dual minerallac clamps ( http://minerallac.thomasnet.com/viewitems/pipe-fasteners/ll-categories-cully-pipe-fasteners-conduit-hangers?bc=100%7C1006%7C1281forward=1) to tie the conduits to the riser on the array support. Has worked well over the years and the inspectors like the bond between the arrays. From:August Goers aug...@luminalt.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Thursday, October 8, 2009 11:07:08 AM Subject: [RE-wrenches] Rooftop wiring methods between multiple subarrays Hi Wrenches, I’m looking for fresh ideas on how to run USE-2 wires between subarrays on rooftops. Let’s say we have a flat roof commercial system with dozens of separate rows of modules. How would you folks run the USE-2 wiring between these arrays? We’ve been using J-boxes and EMT which is robust but time consuming. I’ve also used strut with a cap strip on the top which effectively makes a wire raceway but it is difficult to properly ground both ends of the raceway and is also time consuming. Looking forward to hearing your ideas. Best, August August Goers Luminalt Energy Corporation O: 415.564.7652 M: 415.559.1525 F: 650.244.9167___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
[RE-wrenches] Inverter Phasing on a single phase system
I have a question on inverter phasing. By that, I mean connecting multiple 240 volt inverters to a common single phase sub panel or service panel and the need (or not) of making sure that L1 -L2 correspond on each inverter to the L1 - L2 buss bar in the panel. I recall issues in the early days with the SMA 2500's and the need to phase the inverter ac outputs so that the L1 - L2 was the same with all the inverters. I have a Sunpower system with multiple 5200's that is reportedly back feeding half of what was expected, even though the production numbers on the inverter are showing full expected production. I haven't examined the site yet. Max Balchowsky SEE Systems 760-403-6810 Building a Better Future For The Next Generation ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Rooftop wiring methods between multiple subarrays
August - we've been using 1/2 emt between arrays with plastic bushings to protect wires and a dual minerallac clamps ( http://minerallac.thomasnet.com/viewitems/pipe-fasteners/ll-categories-cully-pipe-fasteners-conduit-hangers?bc=100|1006|1281forward=1) to tie the conduits to the riser on the array support. Has worked well over the years and the inspectors like the bond between the arrays. Max Balchowsky SEE Systems 760-403-6810 From: August Goers aug...@luminalt.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Thursday, October 8, 2009 11:07:08 AM Subject: [RE-wrenches] Rooftop wiring methods between multiple subarrays Hi Wrenches, I’m looking for fresh ideas on how to run USE-2 wires between subarrays on rooftops. Let’s say we have a flat roof commercial system with dozens of separate rows of modules. How would you folks run the USE-2 wiring between these arrays? We’ve been using J-boxes and EMT which is robust but time consuming. I’ve also used strut with a cap strip on the top which effectively makes a wire raceway but it is difficult to properly ground both ends of the raceway and is also time consuming. Looking forward to hearing your ideas. Best, August August Goers Luminalt Energy Corporation O: 415.564.7652 M: 415.559.1525 F: 650.244.9167___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] AC DC in Raceway
Nik, we always use 4x4 gutters when ever possible - keeps things clean and neat - as long as insulation voltage rating is same on all wires and wires are bundled (AC and DC - tie wraps or tape) and it's all from the same system (house wiring is another system) then it's OK... Max Balchowsky SEE Systems From: Nicholas Ponzio, Building Energy npon...@buildingenergyus.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Thursday, September 24, 2009 4:02:21 AM Subject: [RE-wrenches] AC DC in Raceway Wrenchers, What's the deal with mixing AC and DC conductors in a raceway? The job in question has a 6x6 wireway under the inverters. Conductors will have their own conduits but is it ok for them to share the wireway? Thanks in advance for clarification on this, Nik -- Nicholas Ponzio Building Energy 1570 South Brownell Road Williston, VT 05495 t: 802-859-3384 x15 f: 802-658-3982 www.BuildingEnergyVT.com Building Solutions for a Sustainable Future___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] S-5 clamps on the standing seam roof
check the specs on how the roof is attached to the building. From: Paul Lyons ly...@zapotecenergy.com To: re-wrenches@lists.re-wrenches.org Sent: Wednesday, August 26, 2009 3:32:17 PM Subject: [RE-wrenches] S-5 clamps on the standing seam roof Hello RE-Wrenches – We are working on the design details for S-5 clamps on a standing seam roof with the PV modules mounted directly on the clamps at four points (i.e. no horizontal rails). The roof is made by Metl Span of Lewisville, Texas. The building is in New England and the roof has a slope of 0.5:12 Have any of you had experience with these clamps and/or this particular roof manufacturer? Paul Lyons, P.E. Zapotec Energy Inc. 675 Massachusetts Ave Cambridge, MA 02139-3309 Tel: 617-547-5900 ext.201 Fax: 617-547-5901 Mobile: 617-285-0634 Email: ly...@zapotecenergy.com___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Thermal issues with PVC (was RE: raintite box mounting angle)
The early Siemens solar kits came with a heavy Gage plastic box that mounted on an S bracket tucked neatly under the panel...It worked well Max Balchowsky SEE Systems 760-403-6810 From: Drake Chamberlin drake.chamber...@redwoodalliance.org To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Tuesday, August 25, 2009 6:15:49 AM Subject: Re: [RE-wrenches] Thermal issues with PVC (was RE: raintite box mounting angle) You can get metal NEMA 4 and NEMA 12, gasket sealed boxes made by Hoffman. There should be no deformation issues. The only possible issue could be the temperature of the gasket, but it would be held in place by the clamped cover. Have the gaskets had an issue with the deformed PVC boxes? At 10:44 PM 8/24/2009, you wrote: Hans, that is an interesting reference, well done. what about if the box is under the panels and only experiencing ambient temperatures? That is kind of my current preference when I have to use pvc due to the deforming issues... since the panels are movable by unbolting the slow-release mounting system, it is alright. ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org Drake Chamberlin Athens Electric OH License 44810 CO License 3773 NABCEP TM Certified PV Installer Office - 740-448-7328 Mobile - 740-856-9648 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] water pump system
Looking for some input on the following for a friend - San Diego area - want to help him with a solar solution, but don't have much water pump experience Thanks for any help Max Balchowsky SEE Systems Hiya Max, Here's the info on pump demands: Elevation to tank: ...150' Pipe length: about 2500' , with about 700' of this at a 9% grade 1800' at a 70% ( + - ) grade. Pipe: 3 wide Well depth: 130' vertical. Motor: 3.5 H.P. G.P.M. : 25 is how it is now. Would this change with only day light use? I assume we'd produce 7,500 gallons most days with solar. Pump is submerged as of now. Thank you !___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Packaged On-Grid PV Systems
We've worked with a local distributor and have been able to design the kits ourselves with all the familiar components we've found most trustworthy over the years. If we need anything specific for any particular installation, a phone call changes that particular kit It's work well... Max Max Balchowsky SEE Systems see the future seesolar.com - Original Message From: David Palumbo d...@independentpowerllc.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Wednesday, August 5, 2009 3:19:29 PM Subject: Re: [RE-wrenches] Packaged On-Grid PV Systems Joel, We use pre-packaged systems when working with out of state electricians. We have used SunWize kits in these cases and have been happy with them. Good engineering design, solid components and good documentation/manual. For our own local installs we find that working with individual components that we have worked with time and time again is the way to go because we get these component parts at better discounts than the distributor kits. Dave -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Joel Davidson Sent: Tuesday, August 04, 2009 11:43 PM To: RE-wrenches Subject: [RE-wrenches] Packaged On-Grid PV Systems Hello wrenches, I'm getting tired of shopping for parts and want to spend less time talking to vendors and more time with customers. Some manufacturers and distributors offer packaged on-grid residential PV systems that include modules, mount, inverter, etc. I know some wrenches are don't like packaged systems, but if you do and are selling and installing packaged systems, what packages do you recommend? From what distributors? Thanks in advance for pointing me in the right direction. Joel Davidson ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Tile Roof Mounts
We've used Pro Solar tile track in this application for years, very successfully... Max Balchowsky SEE Systems - Original Message From: Peter Parrish peter.parr...@calsolareng.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Friday, May 15, 2009 3:10:21 PM Subject: Re: [RE-wrenches] Tile Roof Mounts For flat concrete tile and S-tile, we like the ProSolar Tile Track product. It takes some time to install, however, the resulting penetration (the annular ring gap between the hole on the concrete tile and the SS all-thread is about 1/16 inch (worst case 1/8). The all-thread does a good job of securing the tile in place. - Peter Peter T. Parrish, Ph.D., President California Solar Engineering, Inc. 820 Cynthia Ave., Los Angeles, CA 90065 Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885 CA Lic. 854779, NABCEP Cert. 031806-26 peter.parr...@calsolareng.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Brian White Sent: Friday, May 15, 2009 2:27 PM To: RE-wrenches Subject: [RE-wrenches] Tile Roof Mounts I know that this has most likely been discussed previously on this forum, but I am having difficulties with the sites search engine and finding any results. I am curious what is everyone's preferred method or product of choice is for anchoring / attaching a racking system (UniRac or others) to a Flat Concrete tile or Spanish tile style roof, New Construction versus Retro fit. Does anyone have any experience with Creotec's AluTec tile hooks, or equivalent? I am trying to get an idea of what is out there, what most installers prefer, what the pros and cons may be (does the tile have to be cut or not, are they a pain to work with, etc...) Not looking for a super detailed response, but a nudge in the right direction would be appreciated. I know this seems odd, being employed by a concrete tile manufacture and all, but up to this point it has not come up with standard panels. Best Regards, Brian C. White Eagle Roofing Products. ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Solid state relay (SSR) questions
We've used Optoblocks (SSR's) for years in traffic signal work, very reliable. Max Balchowsky SEE systems From: Marv Dargatz mdarg...@enphaseenergy.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Wednesday, April 29, 2009 10:33:51 AM Subject: Re: [RE-wrenches] Solid state relay (SSR) questions Hey Mick, We used a lot of SSRs in wind turbine controls. Found them to be extremely reliable. Overrating the device is a very good idea. Also be careful of very low temperatures, as the Current Transfer Ratio (CTR) of the optical isolation can degrade over time and eventually cause failure to operate at very low temperatures. When used within their ratings, they are extremely robust and reliable with a long lifetime. Opto22.com is a very good resource. See Ya! Marv Enphase Energy 707 763-4784 x7016 Mick Abraham wrote: Hello, Wrenchers and special greetings to the silicon gurus to whom I address these questions about solid state relays. A client wants a gizmo to connect grid AC In to their inverter/charger when the battery voltage is low...resembling the LBX function on the good ol' Trace SW inverter. The grid power would feed into a 120/240 Magnum inverter/charger which is rated for 30 amps pass through on each hot leg. I may use a solid state relay for the heavy lifting: double-pole, single-throw, normally open...with DC for the control voltage. Using a voltage controlled switch, I'll send battery DC to the SSR when the battery voltage goes too low for too long; then I'll remove that DC trigger when the battery voltage recovers. Question 1: Are SSR's suitable for the variety of loads (including motors) that this circuit might carry? Question 2: Should the SSR be massively over-rated relative to the expected load (as with typical electronic design practice)? McMaster-Carr stocks solid state relays with built in heat sinks; model 7456K43 is published for 30 amps @ 230 volts AC. If protected with a 30 amp double-pole breaker, would this relay suffice long term or would it instead produce expensive smoke? (Let's assume free air conditions around the heat sink and a 90 degree F ambient temperature.) Question 3: Should I instead bump up to model 7456K44 with a 50 amp rating for this 30 amp pass through situation? I like the idea of no moving parts/no arcs/no clunks compared to a mechanical power relay, but I also want no customer callbacks. High speed switching (pulse width modulation) is not one of our requirements, so... Question 4: ...is it bad strategy to even consider using an SSR for this application? Thanks in advance, Mick Abraham, Proprietor www.abrahamsolar.com Voice: 970-731-4675 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] To Megger or not to Megger
I haven't used a meggar since I stopped designing traffic signal systems. No ill affects so far ( 20 years now ) Max Balchowsky SEE Systems From: Keith Cronin electrich...@yahoo.com To: RE-Wrenches re-wrenches@lists.re-wrenches.org Sent: Monday, April 27, 2009 2:36:35 PM Subject: [RE-wrenches] To Megger or not to Megger Hi I was wondering, by a show of hands, how many of you megger every project? Do you have a cut off- like if it is x sized system, you will or decide to opt out of performing this task?___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Enphase Application
Deigning a 14 Kw system that has partial shading issues and am considering Enphase, what has been your (anybody's) experience with Enphase. Max Balchowsky SEE Systems 1100 Irvine Blvd Tustin, Ca. 92780 www.seesolar.com 760-403-6810 Building a Better Future For The Next generation ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Enphase Application
I'll be using the Suntech 210's (78 of them as it turns out), but I've engineered it for 3 SMA6000us inverters. I don't know if it's safe to tell anyone what I will pay for them... I still am reticent to have 78 inverters under panels out of reach on a roof. Has anyone had any of these installed long enough to feel good about that? - Original Message From: Tump t...@hughes.net To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Monday, April 13, 2009 2:13:42 PM Subject: Re: [RE-wrenches] Enphase Application Nice product, GOOD customer support pricing for web monitoring has come down too. Don't know what modules you are using but they are NO longer making one for the Sanyo HIT BA19 series hi voltage modules -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Max Balchowsky Sent: Monday, April 13, 2009 2:29 PM To: RE-wrenches Subject: Re: [RE-wrenches] Enphase Application Deigning a 14 Kw system that has partial shading issues and am considering Enphase, what has been your (anybody's) experience with Enphase. Max Balchowsky SEE Systems 1100 Irvine Blvd Tustin, Ca. 92780 www.seesolar.com 760-403-6810 Building a Better Future For The Next generation ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] grid tie sync with big stiff genny?
Geoff, I'd like to know a little more about your project, I may have a solution on the turbine side that we've used you could sell them and couple it with the solar.. Contact me off-list Max Balchowsky SEE Systems 760-403-6810 From: Geoff Greenfield ge...@third-sun.com To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Wednesday, March 11, 2009 7:35:28 AM Subject: [RE-wrenches] grid tie sync with big stiff genny? Undoubtably many of us are getting interesting project requests as folks want to sprinkle magic stimulus dust on things to make solar panels grow... We have a project with a huge electrical load, pumping water for a medium sized city. They want solar... great. Easy. They had a power outage and kept running with 2.6 MW of diesel generators. They are interested in solar's ability to do backup. I don't think that many batteries will fit in my pickup truck, and I hate working with 300/0 wire. QUESTION: (and maybe its an easy one and the SMA guys will say, sure, we did that in Greece). Is it viable to set up a micro-grid in this scenario and run an island-mode, with available solar reducing the genny plant demand? Should I just say forget it or, at this MW scale, would the switchgear and effort be practical? Thanks. For a brighter energy future, Geoff Greenfield President Third Sun Solar Wind Power Ltd. 340 West State Street, Unit 25 Athens, OH 45701 740.597.3111 Fax 740.597.1548 www.Third-Sun.com Clean Energy - Expertly Installed___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Cad to PDF problem
check the properties of the lines your using in cad - their are different settings that look white in acad but are in fact a different property when plotted in PDF. Max From: North Texas Renewable Energy Inc nt...@earthlink.net To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Saturday, February 7, 2009 3:17:03 PM Subject: Re: [RE-wrenches] Cad to PDF problem If you are printing an image rather than text to pdf, do a controlprint screen, open a new blank window in acad and paste it in. You can then get whatever appears on the dwg file more or less 1:1. It does not always give the sharpest images this way and colors can shift but it does do some things acad won't. Acad draws vector images instead of raster so they don't always blow up cleanly. Have you changed any settings recently? Jim Duncan North Texas Renewable Energy Inc 817.917.0527 nt...@earthlink.net www.ntrei.com - Original Message - From: William Miller To: RE-wrenches Sent: Saturday, February 07, 2009 4:12 PM Subject: [RE-wrenches] Cad to PDF problem Friends: I am having problems printing CAD drawings to a pdf. My lines are very thin and faint. Has anyone else experienced this? Got any ideas??? Thanks in advance. William Miller PS: Adobe Pro has a hairline fix tool -- does the job but adds a step. Looking for something automatic. Wm Please note new e-mail address and domain: William Miller Miller Solar Voice :805-438-5600 Fax: 805-438-4607 email: will...@millersolar.com http://millersolar.com License No. C-10-773985 ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Enphase Micro Inverter Energy System
I've been asked to evaluate a set of plans that came accross the counter of a local municipality recently. It was the microinverter system by Enphase. I've seen this product, but this is the first actual installation I'm exposed to. Has anyone installed these? Max Balchowsky SEE Systems From: Geoff Greenfield ge...@third-sun.com To: RE Marketing for home scale RE industry re-mark...@lists.re-wrenches.org; RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Friday, February 6, 2009 12:01:50 PM Subject: [RE-wrenches] new scam? Greating and happy happy friday- Just a heads up (and a quick poll): While I dont even notice the ubiquitous email scams these days, randing from the CC fraud orders for 8 panels 100-120 watts each etc etc to the more popular esteemed sir... help me move these billions in oil kickbacks out etc etc... this one caught my eye: I really should scan it in, but some con took the time to make fake stationary from Creative Partnerships and then typed out an official looking letter and mailed it to me from London! It is from a Mr. Simon Robb and is simila to the email scams where a wealthy saudi seeks to invest $250M in green energy yada yada... Any of you all get the same letter? just curious. Have fantastic, restful (and sunny) weekends. For a brighter energy future, Geoff Greenfield President Third Sun Solar Wind Power Ltd. 340 West State Street, Unit 25 Athens, OH 45701 740.597.3111 Fax 740.597.1548 www.Third-Sun.com Clean Energy - Expertly Installed___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Maxing out the roof
Our policy on filling a roof with solar is dictated by the local fire marshall. More and more they are gravitating toward the state standard (california) which is 3' from the ridge and sides and 1 1/2 ft each side of the valleys. we've had some exceptions but more and more we are finding them sticking to the state standard. Max Balchowsky SEE Systems From: Tump t...@hughes.net To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Tuesday, February 3, 2009 4:28:08 AM Subject: Re: [RE-wrenches] Maxing out the roof How about using modules w/ a higher power density? I always try to keep modules from the edge, but . -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Andrew Truitt Sent: Monday, February 02, 2009 1:04 PM To: RE-wrenches Subject: [RE-wrenches] Maxing out the roof Greetings! First off, thanks to Allan, Brian and Peter for your input on the external disconnect signage - I won! We're having a UV rated plastic sign made right now. I'm interested in hearing what company's policies are regarding filling a roof with solar. I have always advocated for a 2-3' perimeter around the array to a) facilitate ease of installation, b) prevent excessive wind loading at the roof edge, c) allow access for firefighters and d) I personally think it looks better. However, I've been getting a little pressure from the higher-ups to let the designers place modules right up to the edge of the roof to increase system size. Their responses to my arguments are a) take all the necessary precautions to keep the installers safe while installing at the roof edge, b) install more attachments near the roof edge to strengthen the rack structure, c) there is no requirement in our area for firefighter access and there will always be access on the north-facing roof anyway and d) a roof full of PV looks like a pile of money. What is your policy on array size and why? Andrew Truitt Standard Solar -- Don't get me wrong: I love nuclear energy! It's just that I prefer fusion to fission. And it just so happens that there's an enormous fusion reactor safely banked a few million miles from us. It delivers more than we could ever use in just about 8 minutes. And it's wireless! ~William McDonough___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Maxing out the roof
Joel, you're right. I think you have a better perspective than most, having been in the industry so long and watching the changes and the politics. I have sat across the table at meetings with building officials and fire marshals discussing this issue only to have the rug pull from under a decision once it moved to the next level politically within the system. As of late I watched a 14 Kw system go thru more than 8 weeks of maneuvering through Newport Beach city hall only to be kicked back again when the FD decided that PVC couldn’t be used on the roof (can’t use EMT in NB) and now it had to be plumbed in GRC, further increasing the cost to the customer. I honestly don’t know where this will end, but it becomes more and more frustrating as we go... Maxing out the roof Balchowsky From: Joel Davidson joel.david...@sbcglobal.net To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Tuesday, February 3, 2009 8:36:02 AM Subject: Re: [RE-wrenches] Maxing out the roof Hi Max, I can't resist writing - Max is on the roof maxing out the roof. Now that I got that out of my system, what we are seeing are increasingly restrictive rules that limit how much PV a person can have. Granted, neighbors have the right to protect themselves and their property from actual and potential dangers like solar modules blowing off the roof or fires spreading from one house to another. But do my neighbors' rights to protect include denying me the use of my entire roof, or for that matter, anywhere on my property? Yes. Depending on your local laws, you cannot stick your PV outside your property setbacks. You cannot put your PV on above certain heights. You cannot put your PV up to your roof ridge. You cannot fill your roof with PV. You cannot have ground-mounted PV without taking measures to protect trespassers. And so on... The same loss of freedom happened with other technologies (radio, automobiles, airplanes, etc.) as they moved into the mainstream. So PV pioneers, enjoy your success but add insurance, permit fees, legal fees, and other costs to your cashflow budget. Joel Davidson - Original Message - From: Max Balchowsky To: RE-wrenches Sent: Tuesday, February 03, 2009 8:04 AM Subject: Re: [RE-wrenches] Maxing out the roof Our policy on filling a roof with solar is dictated by the local fire marshall. More and more they are gravitating toward the state standard (california) which is 3' from the ridge and sides and 1 1/2 ft each side of the valleys. we've had some exceptions but more and more we are finding them sticking to the state standard. Max Balchowsky SEE Systems ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Maxing out the roof
Watching my language greatly limits my response... From: Joel Davidson joel.david...@sbcglobal.net To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Tuesday, February 3, 2009 10:34:03 AM Subject: Re: [RE-wrenches] Maxing out the roof Call-back costs are going down because inverters and bos are more reliable and installation practices improve, but increased re-design and permit issues are driving GA costs up. I try not to get angry when salaried public employees waste my time and taxpayers' money reviewing something they don't know about. If back-end problems are called call-backs, what do you call front-end problems (and watch yer language, buddy)? - Original Message - From: Max Balchowsky To: RE-wrenches Sent: Tuesday, February 03, 2009 9:50 AM Subject: Re: [RE-wrenches] Maxing out the roof Joel, you're right. I think you have a better perspective than most, having been in the industry so long and watching the changes and the politics. I have sat across the table at meetings with building officials and fire marshals discussing this issue only to have the rug pull from under a decision once it moved to the next level politically within the system. As of late I watched a 14 Kw system go thru more than 8 weeks of maneuvering through Newport Beach city hall only to be kicked back again when the FD decided that PVC couldn’t be used on the roof (can’t use EMT in NB) and now it had to be plumbed in GRC, further increasing the cost to the customer. I honestly don’t know where this will end, but it becomes more and more frustrating as we go... Maxing out the roof Balchowsky From: Joel Davidson joel.david...@sbcglobal.net To: RE-wrenches re-wrenches@lists.re-wrenches.org Sent: Tuesday, February 3, 2009 8:36:02 AM Subject: Re: [RE-wrenches] Maxing out the roof Hi Max, I can't resist writing - Max is on the roof maxing out the roof. Now that I got that out of my system, what we are seeing are increasingly restrictive rules that limit how much PV a person can have. Granted, neighbors have the right to protect themselves and their property from actual and potential dangers like solar modules blowing off the roof or fires spreading from one house to another. But do my neighbors' rights to protect include denying me the use of my entire roof, or for that matter, anywhere on my property? Yes. Depending on your local laws, you cannot stick your PV outside your property setbacks. You cannot put your PV on above certain heights. You cannot put your PV up to your roof ridge. You cannot fill your roof with PV. You cannot have ground-mounted PV without taking measures to protect trespassers. And so on... The same loss of freedom happened with other technologies (radio, automobiles, airplanes, etc.) as they moved into the mainstream. So PV pioneers, enjoy your success but add insurance, permit fees, legal fees, and other costs to your cashflow budget. Joel Davidson - Original Message - From: Max Balchowsky To: RE-wrenches Sent: Tuesday, February 03, 2009 8:04 AM Subject: Re: [RE-wrenches] Maxing out the roof Our policy on filling a roof with solar is dictated by the local fire marshall. More and more they are gravitating toward the state standard (california) which is 3' from the ridge and sides and 1 1/2 ft each side of the valleys. we've had some exceptions but more and more we are finding them sticking to the state standard. Max Balchowsky SEE Systems ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] Personal project: roofing colors
William, the 6 years I spent in he Palm Springs area gave me a lot of exposure to what works and what doesn't as far as roofing material. The longest lasting and best insulators were standing seam metal and vinyl covered foam. A white rooffing material made an incredible difference in tempretures. A roof that was untouchable with gray crushed rock was very comfortable to the touch after being painted white. William Miller [EMAIL PROTECTED] wrote: Friends: I have an energy question on a personal project. We are adding two rooms to our house and it is time to select roofing colors. Nothing will match the weird comp shingles already on our roof, so we are going to not match and re-roof the rest of the house later. In the meantime, I need to pick a shingle color. How much difference does a lighter roof color make here in our inland California (Mediterranean) climate? We get over 100F frequently in the summer. Thanks for your insight. William Miller ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
Re: [RE-wrenches] offgrid system question
You're right Mick, It is an XW 6048, there's only one and I really think I'm going to find that the biggest problem is that there is not enough inverter capacity capacity with just one unit (the scematic shows a 60 amp breaker on the output). The system is new ( installed within the last 4 months and the batteries were new) The AC unit is 240 volt. Max Balchowsky SEE Systems mick abraham [EMAIL PROTECTED] wrote: Max wrote about the problem child system which is tripping off when the AC unit tries to start. Mick says: you didn't mention what brand of inverter is on board the system, but in any case there's probably an error code that you can find to explain the shutdown. The error could be due to the low voltage disconnnect point being reached on the battery, or it could be due to excessive AC amperage demand from the air conditioner...the latter case seems quite likely because of the 3.5 ton thing, but even if you address that part of the problem there still may be nuisance shutdown problems if there are battery health issues going on. You mentioned MPPT60-150 as the charge controller. From that, I assume Xantrex XW...and one might assume the inverter is from that same product line. They build two 48 volt units...I'll bet if there's an XW inverter in the system that it's probably model 6048...6 kW continuous with a 12 kW surge. Please confirm. I have a client who tried running (two different) 5 ton air conditioners using XW 6048 based gear. He didn't even try with a single but he found that inverter doubles succeeded with one of his refrigerated air systems and not with the other one. The difference was due to a different SEER rating. He added a third inverter/charger and now has plenty of cranking power for either air conditioner. My big concern now is the grinding effect that such an intense load has on his battery bank, but I digress...if there's XW gear involved in your problem child system, throw another inverter at the load but watch the battery for signs of puckering. If you do stack a second XW machine, there is some setup involved in naming the two units and in setting one up as the slave. Mick Abraham, Proprietor www.abrahamsolar.com Voice: 970-731-4675 ___ List sponsored by Home Power magazine RE-wrenches@lists.re-wrenches.org http://lists.re-wrenches.org/listinfo.cgi/re-wrenches-re-wrenches.org List rules etiquette: http://www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org ___ List sponsored by Home Power magazine RE-wrenches@lists.re-wrenches.org http://lists.re-wrenches.org/listinfo.cgi/re-wrenches-re-wrenches.org List rules etiquette: http://www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
