<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div></div><div>Hi drake,</div><div><br></div><div>The early failure of other batteries brings up questions</div><div><br></div><div>Charge set points?</div><div>Frequent overcharge, possible but damn unusual</div><div>Frequent undercharge?</div><div>Hi heat location?</div><div><br></div><div>Offgrid?</div><div>Ongrid?</div><div><br></div><div>Battery type?</div><div><br></div><div>Jay</div><div><br></div><div>Peltz power. </div><div><br></div><div><br>On Aug 24, 2016, at 7:36 AM, Drake <<a href="mailto:drake.chamberlin@redwoodalliance.org">drake.chamberlin@redwoodalliance.org</a>> wrote:<br><br></div><blockquote type="cite"><div>
The batteries were tested with a glass bulb, turkey baster type
hydrometer. The SG read higher than the scale on all the batteries. The
electrolyte was clear. The batteries were not too old, maybe three years,
with some newer ones, as others in the bank had failed. The corrosion was
notable. I did not install the batteries, so don't know if the battery
jumpers were cleaned at installation. Could terminal corrosion have
aggravated the problem in anyway?<br><br>
At 10:01 AM 8/24/2016, you wrote:<br>
<blockquote type="cite" class="cite" cite="">Content-Type:
multipart/related;<br>
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How are you reading the SG?<br>
<br>
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<b>Dana Orzel</b> <br>
Great Solar Works, Inc - NABCEP # 051112-136<br>
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<b>From:</b> RE-wrenches
[<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" eudora="autourl">
mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of
</b>Drake<br>
<b>Sent:</b> Tuesday, August 23, 2016 7:45 PM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> [RE-wrenches] Battery issue<br>
<br>
Hello Wrenches,<br><br>
I was analyzing a string of 8 Trojan L-16 batteries with badly corroded
terminals. The specific gravity read perfect on each battery. Two of the
batteries read low voltage; about 4.2 volts.It seems like one cell's
worth of voltage wasn't showing up on each battery. Has anyone seen this
before? <br><br>
What would cause this? How can the specific gravity be right?<br><br>
Thanks,<br><br>
Drake <br><br>
Drake Chamberlin<br>
<i>Athens Electric LLC<br>
OH License 44810<br>
CO License 3773<br>
NABCEP Certified Solar PV <br>
740-448-7328<br>
</i><a href="http://athens-electric.com/">http://athens-electric.com/</a>
<br><br>
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