Re: [RE-wrenches] EMT in attic

to find materials with listing for the purpose but never got to the bottom if it. I have always had a problem when I saw thin wall AL flex being used with twist-in-insert type fittings. Mark Frye On 11/9/2012 5:44 AM, Dave Click wrote: Nick, what the AHJ is telling you may actually

Re: [RE-wrenches] How do we wrenches provide pertinent advice? (was120% rule applying to conductors)

Exactly, Another fine example of how the Code works. Anyone out there have the definition of special permission. Any changes have to go back to the NFPA? Really the buck stops at the quasi-judicial authority of the head of the building department. Inspectors are the bearers of that

[RE-wrenches] Short Circuit Cell Damage

thoughts? Mark Frye Berkeley Solar Electric 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

[RE-wrenches] Grounding - Exposed Metal Part

find references in the Code to support this. Mark Frye Berkeley Solar Electric 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

Re: [RE-wrenches] Grid tied PV to subpanel on detached garage?

1 - What is the AC output rating of the PV inverter? 2 - What is the size of the feeder conductors? 3 - Does the sub panel at the garage have a main breaker of it's own? 4 - Does your AHJ or utility require anAC disconnect or not? Mark Frye Berkeley Solar Electric Systems On 4/11/2012 7:09 AM

Re: [RE-wrenches] Grid tied PV to subpanel on detached garage?

Also, Was a ground conductor run with the feeder? Mark Frye On 4/11/2012 7:09 AM, Aladdin Solar wrote: Wrenches: There's probably an obvious answer but please help me think this through. Here's the situation--comes up all the time: The PV array and grid-tied inverter will be located

Re: [RE-wrenches] Grid tied PV to subpanel on detached garage?

Not necessarily. NEC 2008, 250.32 (B), Exception allows you to use the neutral conductor for existing structure so long as several requirements are met. Check it out. On 4/11/2012 8:41 AM, Aladdin Solar wrote: I meant the question largely to be a generic one but I can give you an example:

[RE-wrenches] WOW Something Gone Very Wrong

* Rooftop solar installation sparks fires in Trenton, New Jersey* 28.03.2012: According to local news portal NJ.com, a rooftop solar system has triggered several small fires at a recycling center in Trenton, New Jersey. The article reports that a major malfunction in the rooftop solar

Re: [RE-wrenches] Listed Battery Enclosure?

Is there a Standard to which a battery enclosure can be tested such that it can be listed and marked as conforming to the requirements of performance that a battery enclosure must conform to in order for that battery enclosure to be used as a battery enclosure? Is the inspector looking at the

Re: [RE-wrenches] Listed Battery Enclosure?

Still, if you put 2 x 4's on the ground between the batteries and the floor, wouldn't the 2x4's have to be UL listed? On 3/22/2012 3:53 PM, Brian Teitelbaum wrote: Jeremy, Sometimes the best enclosure is a locked room. Is it possible in this case to wall off the space and provide a locked

Re: [RE-wrenches] Paralleling Mutlitple Inverter

for things like monitoring equipment, it is reasonable that the above remain unchanged so long as there is permanent marking stating that no additional load circuits can be added (only supported by Code to the extent AHJ's can make determination of acceptability.) Mark Frye Berkeley Solar Electric Systems

Re: [RE-wrenches] Paralleling Multiple Inverter

as the service, then the dedicated load center can be main lug without main breaker. If the dedicated load center is located on a buidling remote from the the service, then it will need a main breaker rated at 125A. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530

Re: [RE-wrenches] Paralleling Multiple Inverter

? Why did they include the language capable of supplying multiple branch if their intent was other than to allow the use of dedicated load centers? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com

Re: [RE-wrenches] Paralleling Multiple Inverter

Rich, If you have an archive of Wrenches email, also see thread on this subject dating on and about March 29, 2011. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re

[RE-wrenches] 24 vs. 48

? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of jay peltz Sent: Tuesday, January 17, 2012 8

Re: [RE-wrenches] 24 vs. 48

OK, But let's assume only one string, how important is it to develop a higher bulk charge current? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org

Re: [RE-wrenches] intermittent battery problem; ...Battery Sulfation

Todd, I thought you were totally off-grid. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun

Re: [RE-wrenches] Sizing 3 phase OCPD - main

Rebekah, If you knew only the power and voltage, then you would use the root of 3 to determine the amps. But since you know the amps, you don't need to use the root. The second equation would be the correct one. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA

Re: [RE-wrenches] under performing Enphase inverters

. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Marco Mangelsdorf

[RE-wrenches] Storing Batteries

you store the acid dry for ten years? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org

Re: [RE-wrenches] Cummins DC generator

I see. So there is a big difference between using the DC generator. With an AC unit I can run it into the inverter/charger and it will give me three stage charging. With the DC unit, I can really only us it to bulk charge. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City

Re: [RE-wrenches] Cummins DC generator

How would you integrate a dc generator like to Polar Power into a standard inverter/charge-battery-pv charge controller system? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com

Re: [RE-wrenches] Adding on to existing PV System

breaker in the existing main panel. Move the existing 30A breaker into the new subpanel and install the new 15A breaker into the same. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com

Re: [RE-wrenches] Adding on to existing PV System

. I think this is a much better interpretation and method that preserves a clean and functional load side connection topology. I think most reasonable inspectors would agree as well. Good Luck. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024

Re: [RE-wrenches] Sharp modules

of the frame brings it into square and on we go. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re

Re: [RE-wrenches] 690.31(B) within the photovoltaic array

Lumeta around this? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf

Re: [RE-wrenches] Grounding Requirement Question

electrode shall be permitted to be used for both systems... Review this article and share it with your inspector in order to determine what is motivating him. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com

Re: [RE-wrenches] AC Coupling

be either a diversi9on load or a contactor that disconnects the grid tied inverters all together. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun

[RE-wrenches] PGE Interconnection Agreement Equipment Changes

Folks, Has anyone talked with PGE about needing (or not needing) a new Interconnection Agreement when changing out inverter make and model without increasing the size of the PV generator (number of modules) on a system that is already interconnected? Mark Frye Berkeley Solar Electric Systems 303

[RE-wrenches] Out of Warranty Inverter Replacements

customers: - Buy the refurbished units w/ 1 year warranty - Buy new replacement units with 10 or 20 year warrranties - Buy entirely new equipment such as Enphase or SolarEdge What are other folks experiencing as we move well past the 5 year warranty horizon for many of our earlier customers? Mark Frye

Re: [RE-wrenches] Out of Warranty Inverter Replacements

based on their online configuration tool, and also well in line the the SMA white paper of many years ago suggesting a 120% mod/inv ratio as optimal. And yet, the first unit failed in 4 years and the refurb failed in 2 year. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada

Re: [RE-wrenches] Out of Warranty Inverter Replacements

, 75%? Would I have avoided most of my inverter failures if I had? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re

Re: [RE-wrenches] Efficient step up, down transformers

? If not, it is possible that the coil taps are connected in a manner that is not efficient. That being said, 15.6 A @ 120V sound like an awefully large number. Perhaps you have a bad connection at one of your pull boxes. I would be happy to stop by and take a look at the xfrm spec etc. with you. Mark

Re: [RE-wrenches] Enphase Nema 6 enclosure - not

the internal face gasket. I really haven't looked into it much further but I wonder if the water you observed entered through an incomplete connector mate, along the conductors, into the inverter enclosure? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530

Re: [RE-wrenches] 3,200AH Battery Bank?

The question is not well addressed without knowing the nominal dc system voltage. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re

Re: [RE-wrenches] smart meters/bidirectional

was behaving the same as to old dics meters. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of jay

Re: [RE-wrenches] Tigo to go?

closely have you looked at this? It looks like the Tigo is already about 1/4 the cost of an Enphase. So how close are you to moving from an optimizer / inverter combination to a microinverter? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http

[RE-wrenches] SolarEdge v Enphase

, with high voltage (over 250V) DC wiring, and doubling DC connector count. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com ___ List sponsored by Home Power magazine List Address: RE

[RE-wrenches] Warranty Claim Based On Enphase Monitoring Data

system yield….0.0013%. I am not complaining, just musing over this interesting evolution. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com ___ List sponsored by Home Power magazine List

Re: [RE-wrenches] Warranty Claim Based On Enphase Monitoring Data

Thanks Phil, I have already swapped the module to confim that the problem follows the module, not the inverter. I am currently working within channels with my distributor for warranty replacement having just requested an RMA. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada

Re: [RE-wrenches] SolarEdge v Enphase

is inherent in microinverters as well. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re

Re: [RE-wrenches] Working on metal roofs.

Bob, I think you are talking about Cougar Paws: http://www.cougarpaws.com/ I love them and buy a pair for anyone who works for me. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com

Re: [RE-wrenches] AC Coupling Xantrex XW Inverters to EnphaseMicroinverters

Jason, My guess is that this will work just fine. My comment is that according to my conversations with Enphase, they would consider this an off-grid application for which they do not warranty their product. If this is the case, it is something your customer should understand upfront. Mark

[RE-wrenches] Enphase Inards - Any Guesses?

of these three is electrically identical and solidly connected inside the inverter. But, I don't know. The folks at Enphase tech support will not tell me whether or not this is true. Anyone out there have any ideas about this? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City

Re: [RE-wrenches] Oatey and Standoff vs QuickmountPV Labor

..except..there wasn't any rubber there anymore...all rotted out. Back in the day I went for a custom rolled cone flashings that I could caulk into the post and slide a rubber counter-flashing over the whole thing. Overkillperhaps. Best of Luck. Mark Frye Berkeley Solar Electric Systems

Re: [RE-wrenches] METAL ROOF ATTACHMENT

Generally, in order to develope the full tensil strength of the bolt, it should be engaged by a minimum of 5 threads. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re

[RE-wrenches] FYI - John Wiles

Manager Southwest Technology Development Institute, New Mexico State University 575-646-6105 575-646-3841 (FAX) http://www.nmsu.edu/~tdi/Photovoltaics/Codes-Stds/Codes-Stds.html SWTDI/NMSU 3705 Research Drive Box 30001/MSC 3 SOLAR Las Cruces, NM 88003-8001 Mark Frye Berkeley Solar Electric

[RE-wrenches] Commisioning AGM bats

Folks, I have a couple of new SunExtender AGM batteries that I will be using in a UPS application. My understanding is that I should cycle them before floating them out for standby service. Am I getting this right? How many cycles - to what DOD? Mark Frye Berkeley Solar Electric Systems 303

Re: [RE-wrenches] Two Buildings, Two Services, One Roof

my merry way? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Nick

Re: [RE-wrenches] Two Buildings, Two Services, One Roof

the groundingstem of multiple seperately derived systems, but could we construe a utility service to one dwelling as a seperately derived system relative to another dwelling with it's own service? Where can one find the definition of a seperately derived system in the Code? Mark Frye Berkeley Solar

Re: [RE-wrenches] Two Buildings, Two Services, One Roof

in this case because each building has it's own service and therefore cannot be considered as a seperately derived system. So where does the Code speak to this. My sense is that it is a big no-no, but can exactly explain why. Anyone else out there agree or disagree? Mark Frye Berkeley Solar

Re: [RE-wrenches] Two Buildings, Two Services, One Roof

I have not yet visited the site to see, but I would guess that they are feed from the same transformer. If they were, how would that make it OK? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com

Re: [RE-wrenches] Two Buildings, Two Services, One Roof

. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Dana Sent: Monday

Re: [RE-wrenches] Two Buildings, Two Services, One Roof

Or another way to illustrate this problem: There is nothing in the Code that would stop me from hauling out the old #6 and bonding my GEC to my next door neighbors GEC, if I wanted to? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http

Re: [RE-wrenches] Two Buildings, Two Services, One Roof

it. Otherwise it's onward and upward. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re

Re: [RE-wrenches] Two Buildings, Two Services, One Roof

Folks, I did send the question to John Wiles and he was gracious enough to reply. Here is his response: Mark: Better ask the utility involved. Probably depends if they are on a common transformer or not. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959

[RE-wrenches] Two Buildings, Two Services, One Roof

I have a customer who has two separate buildings, a home and a shop. Each dwelling has it's own service. He wants to put in two pv systems, one for each service, but wants all the PV modules to be on the shop roof. Why is mind going clunk when I try to deside if this is allowed by Code? Mark

Re: [RE-wrenches] AC Coupling Fronius IG Plus 10.0 inverter

the DC diversion side solution if you have someplace to put the power instead of just the batteries, although that might be generally less commonly available for retrofits into existing on-grid households. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401

Re: [RE-wrenches] AC Coupling Fronius IG Plus 10.0 inverter

high. Once the voltage drops the contactor can close and bring the Fronius back on line and then the 5-minute start up delay before it is feeding the line again. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com

Re: [RE-wrenches] Battery watering

caps using the gravity feed. I don't have any idea what is going on with the distribution of the product from Europe. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com

Re: [RE-wrenches] Generator and Enphase

, so better safe than sorry. So now I see, I have to do what I have to do if I want to be even half as good an electrican as my NABCEP certification says I am. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com

Re: [RE-wrenches] sizing a sub-panel used tocombinemultipleinverter outputs

not exceed the allowance for the feeder or the sub-panel. Still, if you do have loads in the subpanel, you have to up sizes the sub-panel, but not the feeder conductor. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com

Re: [RE-wrenches] sizing a sub-panel used to combine multipleinverter outputs

an over current condition in any of that equipment. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun

Re: [RE-wrenches] sizing a sub-panel used tocombinemultipleinverter outputs

we need more to concern ourselves with continuous overload conditions and not so much with short-circuit/ground fault conditions? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com

Re: [RE-wrenches] sizing a sub-panel used to combine multiple inverteroutputs

wiring. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Al

Re: [RE-wrenches] sizing a sub-panel used to combine multiple inverter outputs

I think Kent and I agree. For the case where the subpanel is not dedicated a PV sub-panel he is calculating for 2 - 50A breakers and I calculated for 3 - 50A breakers. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com

Re: [RE-wrenches] sizing a sub-panel used to combine multipleinverter outputs

Opps! My bad, I was thinking of a single phase system, not the three phase system shown in the article. For the three phase system Kent is correct in counting 180A of supply per bar. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http

Re: [RE-wrenches] Generator and Enphase

will see the same 480A of supply breakers as the conductors and busbar of the 400A load center. Here is where I am taking leap of faith that the AHJ will agree with me that the same 120% allowance given to the conductors and load center will be given to ATS itself. Mark Frye Berkeley Solar Electric

Re: [RE-wrenches] Generator and Enphase

Ken, In the situation you show in your drawing, what was the rating of the transfer switch? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun

Re: [RE-wrenches] Generator and Enphase

agreed with me that this was an undesirable constraint on the operation of an otherwise reliable grid-tied system and it was not clear that this would satify the warranty issue. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http

Re: [RE-wrenches] Xantrex/Schneider recall

) 519-1470 f: (604) 422-2756 Only have one of these puppies in the field, no problems yet. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re

Re: [RE-wrenches] grounding the Enphase inverter

derived system and would not require it's own system ground. At that point, would the AC side of the inverter still be considered a separately derived system or would the need for system grounding go away? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401

Re: [RE-wrenches] grounding the Enphase inverter

disipators DC power supplies Standby generators ?? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf

Re: [RE-wrenches] grounding the Enphase inverter

the complexity in wiring? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Bill Brooks Sent

[RE-wrenches] Home Brew Frequency Switch

with current capacities would be a problem. It seems like the frequency would be more of a problem for some devices. Anyone have experience with deliberately adjusting generator frequency away from 60 hertz as described above? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City

Re: [RE-wrenches] Can I handle the voltage drop?

it in the wings to address voltage faults if they occur. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun

[RE-wrenches] Can I handle the voltage drop?

their time faulting and resetting during daily peaks. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re

Re: [RE-wrenches] Grid Tied AC Disconnect Question

Aaron, Can you give a bit more information? Is this a situation where the meter and the main disconnect are located on the outside of the building, with a feeder running to a load center in the garage? Does the utility at this location require a external lockable disconnect? Mark Frye

Re: [RE-wrenches] 2011 NEC and impact in the field

Does anyone here have the 2011 Code available on CD in a searchable format? Know where to get it? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com -Original Message- From: re-wrenches-boun...@lists.re-wrenches.org

Re: [RE-wrenches] 2011 NEC and impact in the field

Thanks August, NFPA says there are giving away a softcover copy of 2011 to folks who take a years subscription to NECPLUS before February something. Seems like a good value. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com

Re: [RE-wrenches] 690.14 (4) Max Number of Disconnects

Al, Are the inverters located inside on the 8th floor with the MLP panel or are they located on the roof? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches

Re: [RE-wrenches] 690.14 (4) Max Number of Disconnects

. I assume that the fused disconnect is co-located in the basement with the service equipment? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun

Re: [RE-wrenches] Another PV fire

Has any information become available about this fire? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun

Re: [RE-wrenches] double insulated PV wire

I am pretty sure you can get it from Multi-Contact USA. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches

Re: [RE-wrenches] Battery Cable REvistied

with grease etc.? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf

Re: [RE-wrenches] Code switch heights

Get three electricians in the room It 6'-7 from the center of the grip of the operating handle...when in highest position. Happy Holidays. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com

Re: [RE-wrenches] Positive-ground question re Sunpower

by a positive static charge which restores the module performance. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re

Re: [RE-wrenches] Enphase warranties

generator situation. Of course I push the question up past first tier support to the supervisor. I bet that if you ask them to put it in writing they will decline. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com

Re: [RE-wrenches] Enphase warranties

the project at all? All you folks who are putting Enphase on the load side of grid-tied, battery based inverters need to ask yourself the same question. It appears that Nick already has his answer. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024

[RE-wrenches] CSI - Warranty

points for not servicing the warranty? Any claw back of CSI funds on projects that don't meet projected yields due to unfulfilled warranty claims? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com

Re: [RE-wrenches] Ground Mount Screening

be steel chain link fence. Hell we have a pool here at our condo and we need a 5 foot metal fence with self closing gate to keep kids out. The County would laugh at me if I went and asked if I could replace it with a wood lattice fence. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada

Re: [RE-wrenches] Ground Mount Screening

over to a PV array and put my hand on a piece of double insulated PV wire with 10A of 30VDC running on it. I don't get it. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com -Original Message- From: re-wrenches-boun

Re: [RE-wrenches] Ground Mount Screening

talking about on one hand the detailed requirements of a UL1741 inverter and on the other the use of garden supply material as requirements for ensuring the safety of the system we build. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024

Re: [RE-wrenches] Supply side connection to a dedicated panel

It doesn't sound like you have a supply side connection. It sounds like you have a load side connection which is upstream of the transfer switch but still downstream of the service disconnect. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024

Re: [RE-wrenches] Supply side connection to a dedicated panel

switch equipment. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf

Re: [RE-wrenches] Battery capacity testers

do they cross over into a daily-cycle off-grid situation with moderate daily DOD? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org

Re: [RE-wrenches] Battery chemistry

Thanks Bill, I am learning more every second. :-) Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun

[RE-wrenches] Interconnection downstream of ATS

this scenario? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 www.berkeleysolar.com ___ List sponsored by Home Power magazine List Address: RE-wrenches@lists.re-wrenches.org Options settings: http

Re: [RE-wrenches] GEC for Enphase inverters

are bonding jumpers that are not required to be continuous. Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http://www.berkeleysolar.com/ www.berkeleysolar.com _ From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun

Re: [RE-wrenches] GEC for Enphase inverters

and may be located anywhere on the premise. The remainder of the circuit is then provided by the EGC as it runs back to the service enterance and then the GEC to the GES. Correct? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 http

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