<font size=2 face="sans-serif">Hi:</font>
<br>
<br><font size=2 face="sans-serif">It occurred to me that with all the
experience on the Wrenches community, we have a unique opportunity to get
perspective on one aspect of battery bank natural aging and failure.</font>
<br>
<br><font size=2 face="sans-serif">Which cells typically fail first,</font>
<br>
<br><font size=2 face="sans-serif">A. The cells on the end of the strings</font>
<br><font size=2 face="sans-serif">B. The cells in the middle of the strings</font>
<br><font size=2 face="sans-serif">C. Random cells in any position.</font>
<br>
<br><font size=2 face="sans-serif">If there is a pattern to failures among
a large group of systems, then that will support cell rotation. If
not, then not.</font>
<br>
<br><font size=2 face="sans-serif">JARMO<br>
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Jarmo Venalainen</b> | </font><font size=1 color=#008000 face="Arial"><b>
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<table width=100%>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">From:</font>
<td><font size=1 face="sans-serif">Drake <drake.chamberlin@redwoodalliance.org></font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">To:</font>
<td><font size=1 face="sans-serif">RE-wrenches <re-wrenches@lists.re-wrenches.org>,
</font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Date:</font>
<td><font size=1 face="sans-serif">08/13/2015 07:03 AM</font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Subject:</font>
<td><font size=1 face="sans-serif">Re: [RE-wrenches] Trojan Batteries</font>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">Sent by:</font>
<td><font size=1 face="sans-serif">"RE-wrenches" <re-wrenches-bounces@lists.re-wrenches.org></font></table>
<br>
<hr noshade>
<br>
<br>
<br><font size=3>Most failures have been in one string of 4 or 8 batteries.
One failure was in two strings of 4. <br>
<br>
At 10:26 PM 8/12/2015, you wrote:</font>
<br><font size=3>What size are the banks are are they series/paralleled
across the terminals? That can cause one or more cells to fail, generally
starting on the negative terminal. The set that failed on me was
series/parallel across the terminals, old school, and the cell closest
to the main negative overheated and shorted out, killing that string. It’s
why I went to buss bars.<br>
<br>
Tom<br>
<b><br>
From:</b> </font><a href=mailto:drake.chamberlin@redwoodalliance.org><font size=3 color=blue><u>Drake</u></font></a><font size=3>
<b><br>
Sent:</b> Wednesday, August 12, 2015 12:03 PM<b><br>
To:</b> </font><a href="mailto:re-wrenches@lists.re-wrenches.org"><font size=3 color=blue><u>re-wrenches@lists.re-wrenches.org</u></font></a><font size=3>
<b><br>
Subject:</b> [RE-wrenches] Trojan Batteries<br>
<br>
Hello Wrenches,<br>
<br>
I have had a number of customers with Trojan L-16s have problems lately.
In some cases, I know that the batteries weren't very well cared for, but
in no case were the batteries totally discharged and let get cold or sit
for a long time. It doesn't seem that the batteries should have died after
a couple of years. I could see diminished output and a reduced life. <br>
<br>
One customer who supposedly knows someone with inside information claims
that Trojan started cutting corners a few years ago to be more competitive
on price. <br>
<br>
Has anyone else seen more problems with Trojan Batteries, or heard that
the company is cutting corners?<br>
<br>
Thanks,<br>
<br>
Drake <br>
<i><br>
Athens Electric LLC<br>
OH License 44810<br>
CO License 3773<br>
NABCEP Certified Solar PV <br>
740-448-7328</i></font><font size=3 color=blue><u><br>
</u></font><a href="http://athens-electric.com/"><font size=3 color=blue><u>http://athens-electric.com/</u></font></a><font size=3>
<br>
<br>
</font>
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