The following was included in an email I got from John:
"US Department of Energy funding for providing support to the PV Industry,
inspectors and others was terminated on 1 March 2011. Questions via e-mail
may be slow to be answered or they may go unanswered depending on available
time. If you feel
HI All,
I was wondering if there is "the" web site that keeps up with new products?
Its really hard to keep up, thought someone might have the great site I haven't
found?
thanks,
jay
peltz power
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Jay:
I appreciate the desire to have a web site for the new products, but we
can't even seem to find web sites for the old products. Solar World,
Xantrex and I am sure others refuse to provide data for legacy
products. Here in the information age we are getting information vacuum at
both en
I don't know of any such website either. It would sure come in handy for
me, writing renewable energy articles. I totally missed Midnite Solar's
new battery capacity meter in my recent battery monitoring article in
Home Power, just because I didn't know it existed and nobody carried it
yet whil
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 R
Batteries in parallel, How to protect from catastrophic failure.
I just got contacted to commission a solar system off grid not of my
design. Eight battery strings in parallel, AGM batteries, 24 volts @ 120 AH
each string (two 12 volt in series) New system, new batteries, Silent POwer
Inverte
We almost had a house fire in the neighborhood a couple months ago from
a parallel battery bank failurean aging 2x8 L16 48v battery bank (16
of them), and one bat in bank one got a short and thermal runaway. I
teach in my firefighter safety classes that thermal runaway is really
rare, but i
I have now been close to three battery fires caused by thermal runaway, (the
telecom industry has had many many more. Before they got the controls to fix
the problem.. Here my suggestion is limit the maximum current that can flow in
a parallel circuit between batteries.
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I like the fused parallel idea; could save the system, and would make battery
troubleshooting nice.
I would suggest #6 jumpers with 50 to 60 amp breakers, so the system could be
operated on just a few strings if needed.
R. Walters
r...@solarray.com
Solar Engineer
On Apr 19, 2011, at 8:29 PM
The broken record will now repeat himself yet again. Bussbars are the way to
go, not across battery terminals but individual strings connected to a central
positive and negative buss from which the inverter connection then runs. This
allows fusing of each individual connection and also allows
Friends:
I have seen 200 A T series fuses bolted directly to the battery terminals
(I've even bolted a 175A breaker to a flag terminal!). Might this be a
crude but effective method to obtain inter-array OC protection?
Wm
At 08:41 PM 4/19/2011, you wrote:
I have now been close to three batt
I know that Michael Welch does not like when we Wrenches goes down the road
of advocacy, but I wanted to put in a plug for John Wiles.
The federal funding that has supported John's time and availability to the
PV industry has been cut. I for one have relied on John as an invaluable
resource o
Anyone else catch the NFPA / UL PV Seminar in Atlantic City? Was it me?Dan BrownFoxfire Energy Corp.Renewable Energy Systems(802)-483-2564www.Foxfire-Energy.comNABCEP #092907-44
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