Nice article, Joel,
I still have 12 ARCO 16-2000 modules powering my off-grid home, and those were
made in 1982 in Camarillo, CA. They are wired into series pairs for my 24V
system, running through an ancient Trace C-30A controller, still going click &
clack after all these years (I have a new
thanks for this. my 30th anniversary with pv is in august. p
Joel Davidson wrote:
If your prospect asks how long do PV modules last, refer them to this
article
http://www.greenbuildingadvisor.com/blogs/dept/musings/testing-thirty-year-old-photovoltaic-module
__
If your prospect asks how long do PV modules last, refer them to this
article
http://www.greenbuildingadvisor.com/blogs/dept/musings/testing-thirty-year-old-photovoltaic-module
___
List sponsored by Home Power magazine
List Address: RE-wrenches@lis
On May 21, 2010, at 9:47:59 AM, i2p wrote:
From: i2p
Subject:Re: [RE-wrenches] Two strings of Different Orientation
Date: May 21, 2010 9:47:59 AM PDT
To: RE-wrenches
On May 20, 2010, at 7:11:45 PM, "Bill Brooks"
wrote:
Maybe
it is a pipe dream, but I would like to think that desig
On May 20, 2010, at 7:11:45 PM, "Bill Brooks"
wrote:
Maybe
it is a pipe dream, but I would like to think that designers,
engineers, and
knowledgeable installers will one day be able to accurately understand
the
irradiance and temperature impacts on I-V curves so that manufacturers
will
be
Kent,
You're absolutely right. I'll submit changes to the manual for our
next round of compliance testing.
Our goal is to reduce installed cost and not compromise safety.
Thanks for the suggestions.
See ya!
Marv
707 763-4784 x7016
Kent Osterberg wrote:
Thanks, Marv.
It is
Thanks, Marv.
It is understandable that ac power should be disconnected
before disconnecting the ac plug and that should be explained in the
manual. However the instruction manual still has contradictory
statements about whether the ac connector can be disconnected
under load. In areas,
Our Grundfos pump distributor has always warned against using the SQF pumps
in pressure pumping situations. I can't quite remember why, but you may
want to check into that. The Lorentz HR's have been the choice in these
situations.
Best regards,
Mark Dickson,
NABCEP Certified Solar PV In
I'm also testing the Envi and so far, I have identified 2 problems.
The first is that it does not show you kilowatt hours, only cumulative cost.
The second is that the power display is called "instantaneous energy."
Isn't that an awful lot like power? ;-)
So far, I'm underwhelmed by the Envi
R
Kent,
The evaluation of the connectors included the abnormal overload test.
This test requires 250 mate/unmate cycles at nominal system voltage and
150% of max rated current. The connectors passed this test with flying
colors, due to the protective functions within the inverter. So, we
coul
Bill,
I agree with everything you're saying, if you substitute "cell
temperature" for "ambient temperature".
See ya!
Marv
707 763-4784 x7016
Bill Brooks wrote:
Peter,
Not to belabor the issue, but your understanding of the I-V curve and how it
responds to changes in irradiance and t
We have had serious interference issues with TED installations. One
small office was completely unable to transmit MTU->gateway signals. TED
tech support just blamed it on interference from fluorescent lights and
UPS systems. I would say their tech support leaves a lot to be desired,
although it is
Hi Kelly,
Unfortunately, my experience with the Honeywell AM-1 is only of recent
vintage.
May I suggest to contact Honeywell comm'l tech support at 1 888 516 9347;
the few times I have used this number, I have been quite impressed with the
results. Honeywell, like so many big companies, can make
I agree with your I-V curve interpretation Bill, I had never considered the
counteracting influences on voltage of reduced irradiance and reduced temp.
Very interesting. Also funny how most manufacturers quit publishing IV
curves
One way to check it Peter, is to turn each subarray on separa
I would say on TED, which i have a limited exposure to, that they need to do
some real work on their documentation because it took me a long time to find
their "firmware" update for mac installation, among others, and wow, providing
a 3 inch cd rom which is un-usable on most computers instead of
15 matches
Mail list logo
