From a link in today's RETScreen newsletter - nothing here any of us has not
seen before, but it is a well put together piece that might be worth handing
out to potential clients as an educational backgrounder
http://www.toronto.ca/taf/pdf/solarcity-horse-palace-june2009.pdf
On Apr 11, 2010, at 9:11 , Darryl Thayer wrote:
Where are people getting 24 or 32 or 48 volt CFLs? Are there any LED now
suitable at these voltages?
Others have commented on the general state of things DC - I have a slightly
different perspective coming form a telecom background and
I spent some time researching power monitoring equipment for a commercial
project earlier this year - a short list of the ones I found interesting
follows:
http://www.powerlogic.com/index.cfm
http://www.dentinstruments.com/
http://www.elkor.net/
http://www.veris.com/
http://www.accuenergy.com/
The Square-D catalogs are marginally clear on which breakers are listed for DC
and for what voltages, but when I tried to select an appropriate load center
for a DC application earlier this year I quickly ran into a number of conflicts
in their catalogs. Here is the response from Schneider
nominal.
Rebekah Hren
North Carolina
http://thecarbonfreehome.com/
--- On Sat, 5/15/10, Kurt Albershardt i...@es-ee.com wrote:
From: Kurt Albershardt i...@es-ee.com
Subject: Re: [RE-wrenches] AC breakers used in DC applications
To: RE-wrenches re-wrenches@lists.re-wrenches.org
Voltage is not the issue here, it is current, and battery fault currents can be
staggering - far more than one would ever encounter in a typical AC system fed
from a distribution transformer. I have seen a 200A Class T fail to act on an
48V inverter fault which resulted in welding the metal
be undertaken.
I like to have primary protection on each string, as close to the battery as
possible - preferably bolted to the battery terminal. Cable limiters are nice,
but a TPL style fuse is easier to get.
On May 16, 2010, at 16:13 , Kurt Albershardt wrote:
Voltage is not the issue here
I'd suggest finding out who the industrial engine dealers are in a large nearby
city (Richmond, VA?) then see who is assembling gensets from which engines.
I've had good relationships with a couple of small builders over the years, one
Isuzu and one Kubota based (though mostly Diesels, after
Once you determine the real pump requirements (as others have mentioned, this
is critical - IME particularly if the well guy sized and sold the pump) and
if a larger than SQflex pump is needed, I have had good luck using VFDs to
drive three-phase pumps with single phase power. You can pay
A little late to the party here, but it might interest you all to know that the
military has its own well-constructed standards for lightning protection. Army
Technical Manual 5-690 is a wonderful educational resource that explains the
rationale for various measures quite clearly (and covers
The telecom industry uses a lot of Sanchem NO-OX-ID A Special - costs a
fraction of what Penetrox E does and doesn't leave copper schmeer all over the
place. We keep a tube in every tool bag.
On Nov 30, 2010, at 12:53 , R Ray Walters wrote:
We use the same inner melt heat shrink, I think.
I'm hearing that it should be OK, but to CYA install a relay.
Yes, but...
The real answer is to find a genset and inverter which can peacefully coexist.
I don't know what sort of regulator topology is used by the gensets we have
heard about, but that seems to be the key. Many
--On Tuesday, November 25, 2008 3:07 PM -0500 Roy Butler [EMAIL PROTECTED]
wrote:
While I strongly recommend the use of a worm gear type winch (because of
it's braking ability) I have to admit that they're getting harder to find.
My elevator guy turned me on to the GoLo - an AC powered hoist
Anyone have realworld experience with the SWWP Skystream 3.7 they can share?
The AnemErgonics foundation kit looks fairly well thought out.
--
Kurt Albershardt
Eastern Sierra Energy Engineering
Reno, NV
775-853-1800
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--On Tuesday, December 23, 2008 8:57 AM -0800 Randy Brooks
ra...@brookssolar.com wrote:
I had a Bergey Xl.1 grid tied through an OutBack GFX2524 for a couple years as
a demo project at my home/office. It worked fine. I did not keep track of
production because I had it on a 40' tower in a
of the structures. Enphase inverters
look like a good fit for this, but I am curious about disconnects labeling. Has
anyone done a job like this?
--
Kurt Albershardt
Eastern Sierra Energy Engineering
Reno, NV
Silver City, NM
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--On Saturday, December 27, 2008 8:08 AM -0700 mick abraham
m...@abrahamsolar.com wrote:
I'm looking for thermal collectors which integrate into the roof of the
building. These would heat glycol to modest temperatures, for domestic hot
water.
Dawn Solar uses a design which effectively
--On Monday, December 29, 2008 8:29 AM -0800 Marv Dargatz
mdarg...@enphaseenergy.com wrote:
The NEC provides for, and the AHJs have accepted the use of the connectors as a
form of disconnect. Of course, each branch is also connected to a dedicated
branch overcurrent device (circuit
--On Monday, December 29, 2008 10:06 AM -0700 Jason Lombard
openhandso...@gmail.com wrote:
I worked on a elderly housing site in northern Ca in which we connected to the
main service on each structure (total of 12) or building.
I'm assuming all those buildings have service billed to the
--On January 31, 2009 8:09:27 AM -0800 Peter Parrish
peter.parr...@calsolareng.com wrote:
We have sold an off grid system delivering 24 volts DC. The application is “mission
important”. We have built in a LVD and alarm, but the client wants an early
warning system based on sending text
--On February 4, 2009 6:28:25 PM -1000 Marco Mangelsdorf ma...@pvthawaii.com
wrote:
I know that it's an oddball size, but I'm looking for a 300A indoor,
surface-mounted 120/240V distribution panel.
Anyone know of an available model and manufacturer out there?
Major manufacturers' 400A
On 2/9/09 12:24 PM, Karl Schwingel wrote:
Have any of you experience with on demand electric water heaters?
At the recommendation of someone on this list a few years back, we
purchased a Stiebel-Eltron Tempra 36 for a project. It seems quite
happy with preheated water and is nicely
On 2/9/09 3:36 PM, wlbr...@pineridgeproducts.com wrote:
We are trying a HeatPump heater as backup for a solar hotwater system.
Trying to get away from propane.
http://www.airgenerate.com/products/specs.html
If that 7,000 BTU/hr rating is correct, it equates to 2kW of resistance
heat, which
On 2/10/09 12:20 AM, Bill Loesch wrote:
What I can offer is that there are five (5) major _manufacturers_ of
tankless water heaters that market to North America. Alphabetically: Bosch,
Noritz, Paloma, Rinnai, and Takagi. A multitude of other companies market
gas tankless. Even more market
On 2/11/09 6:48 PM, Michael Welch wrote:
This seems corroborating. It has GOT to be the same situation:
http://www.examiner.com/x-432-Wedding-and-Marriage-Examiner~y2009m2d10-Our-wedding-anniversary-like-a-house-on-fire-literally
On 2/20/09 6:34 AM, Darryl Thayer wrote:
HI I partook in some calculation to real comparasions several years ago. In
general the results from F-Chart software and I think Maui? did a rather good
job. The RetScreen is very limited at present, to bad because it is so easy
and accessable. ( I
On 2/21/09 10:24 AM, Joel Davidson wrote:
January 1, 2009 LADWP added another interconnection requirement. See
page 8-11 at http://www.ladwp.com/ladwp/cms/ladwp004344.pdf
I found what I think is the relevant section on p. 36 of the PDF (called
out as p. 1-32 at the top of the page.)
This
Can someone point me at a supplier for CSST, tools, and fittings? I've
Googled my way into oblivion searching for these and can only find
references to gas tubing.
One of my vendors who uses it guards their sources far too compulsively.
thanks...
On 2/26/09 2:19 AM, Bill Loesch wrote:
On 2/27/09 12:20 AM, Bill Loesch wrote:
My compliments to solve a water quality problem. Tremendous benefits
for every other water using appliance, valve, and faucet in the dwelling.
Agreed, and I'll add that it's critical to have the water tested before
you propose a treatment strategy.
On 2/28/09 5:12 PM, Bill Loesch wrote:
One of the several CSST manufacturers is Omegaflex who currently sells the
TrackPipe product.
Thanks - I'll be in touch with them Monday.
Following a brief conversation with one of their people
Friday, I learned the gas pipe is made from 304 stainless
On 2/28/09 11:14 AM, cvsol...@aol.com wrote:
What can I reasonably expect to get out of this thing for the $$?
(that I can't do with a phone).
Having fairly extensive experience with both Treo and BlackBerry phones
over the past decade, here are a few thoughts:
BB is overrated in most
On 3/2/09 6:08 PM, Travis Creswell wrote:
FYI, HUP now has a 1990 AH battery. Of course that’s still way too
many stings to get to 19,000 AH (900+ kWh, wow)
Exide makes 3,000 - 4,000 AH wet cells in their solar and telecom
product families.
On 3/13/09 9:34 AM, Mark Edmunds wrote:
We did a test installation in northern British Columbia with 28kW of
PV and GT5 inverters selling to a 90kW Genny system in a remote
off-grid community. So far we have just stuck to the normal 1741
islanding settings, and the system has been working
On 3/30/09 1:23 PM, Jeff Yago wrote:
I have an off grid client out west we designed and installed a large
pv system about 8 years ago that recently
contacted me to say they needed an installation and operator manual
for their Frostek-240 Propane Freezer.
I have tried all the normal channels
Seems the predicted 2012 Carrington Event could have some interesting
side effects. Wondering how PV panels themselves might respond, and if
the existing input stage protection (6 kV IIRC) on charge controllers
and inverters would protect them?
As yet another long-time PC veteran (after IBM SNA and PDP-11s) with way
too much Windows internals experience, I also just purchased my first
Mac. Installed Parallels to support Quickbooks (still no integrated
payroll on their Mac version.)
I have a maxed-out MacBook Pro as a desktop
On 4/13/09 10:41 AM, jeff Wongstrom wrote:
We have had an ongoing problem with slow internet speed caused by
multiple issues, most of which seem to have been corrected over the
past three years with much troubleshooting and with several service
calls.
However, one issue remains and seems to
On 6/19/09 7:43 AM, Jeff Oldham wrote:
The jury is still out with me, but so far I'm feeling optimistic with
my experiences with Duo-regen technology. I use both the mineral
solution additive and the pulse units. The testimonials are impressive
and my experience over the last 5 months is
Check out Nott Ltd. http://www.nottltd.com/lightning.html
I know a couple of RF engineers who swear by these and will not setup a
tower without them. We are looking at putting small ones on each end of
every row on a large array next year.
On 7/22/09 13:57 , toddc...@finestplanet.com
On 8/1/09 4:49 , Richard L Ratico wrote:
2)At a different training, by a well respected professional engineer who
frequently posts here, they were judged to likely be as effective in preventing
damage as a voodoo doll.
I'm not disputing this, but would like to know more. Perhaps our PE
On 8/1/09 11:08 , William Miller wrote:
Our best solution would be to install a 200 amp meter panel with a 100
amp breaker. The application is an agricultural based residence, so
based on how one interpreted this, the back feed allowance would be
either 100 amps or 120 amps, enough to cover
On 8/19/09 15:41 , Dave Click wrote:
Wiring was free air until it got near the disconnect, then the
positive wires entered an open 3' section of FNMC (no strain relief or
box at the other end of the FNMC). The negative wires ran through a
*separate* 3' section of FNMC.
1. Running the
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
Anyone have a link to the IRS or ARRA that details this? Can't find anything
on http://www.treas.gov/recovery/1603.shtml or
http://www.treas.gov/recovery/docs/guidance.pdf or the IRS site.
TIA...
On Dec 13, 2009, at 23:52 , Michael Gullo wrote:
Hi All,
I was bidding a job for a
Good morning, all.
Long time no write.
We have a client with an SW4024 that recently suffered a lightning hit.
The inverter is actually working fine (those things were truly tough) but
the cooling fan now runs continuously.
The SW design team long ago scattered to the winds of Outback,
t; Hello Kurt,
>
> Craig Wilburn at Phantom Power Services should be able to help.
> 425-501-7280
> https://phantompowerservices.com/
>
> Best of luck,
> Lloyd
>
> Lloyd Hoffstatter
> Sunstruck Consulting
>
>
>
> Sent from Mail <https://go.microsoft.com/fwlin
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