<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<div class="moz-cite-prefix"><br>
Mick,<br>
<br>
Thanks for sharing. Outstanding troubleshooting (particularly when
done remotely).<br>
<pre class="moz-signature" cols="72">Bill Loesch
Solar 1 - Saint Louis Solar
</pre>
On 15-Oct-12 8:24 AM, Mick Abraham wrote:<br>
</div>
<blockquote
cite="mid:CABOJ=XRKb4JV4Q_qcQT4eGzr=a=U2zCfu6_X5rv9qxG1-k3ZvQ@mail.gmail.com"
type="cite">Hello, Wrenchies~<br>
<br>
Mac Lewis wrote about battery strangeness on the Sunny Island
system for his clients. Here is a theory to consider, Mac.<br>
<br>
I once bought a 48v string of >famous brand< two volt cells
in which one cell had been loaded backwards into its case. When
hooked up according to the +/- markings on the case, this cell was
discharging at the same time the rest of the string was charging
so even though the others were running high during the charge, the
end to end voltage immediately slumped to relatively low values
after the charge was ended. The one cell was effectively missing
in action.<br>
<br>
My client was a DIY type who was distant from my location but he
owned a voltmeter that was still in the box. I coached him through
a "voltage walk" up the string and sure enough we found the one
increment that was subtracting from overall string voltage instead
of adding to it. The >famous< battery supplier said this was
impossible, they are checked three times, this never happens &
can't happen, blah blah...and they were only convinced when the
cell was back in their shop and they could measure this for
themselves.<br>
<br>
Even after they checked it, they said, "It's the first time in our
20 + years with that brand that we have ever seen this." Black
swan.<br>
<br>
At my request, the company paid to ship back the entire string and
ship all new replacement cells to the client. This seemed
important because the other 23 cells had been subjected to a high
voltage per cell and had gotten a bit hot before the problem was
discovered. <br>
<br>
++++++++++++++++++++++++++++<br>
<br>
Perhaps this theory is worth checking on site. Whatever you find
to resolve this problem, Mac, be sure to report back on list so we
can all learn. <br>
<br>
Jolliness,<br>
<br clear="all">
Mick Abraham, Proprietor<br>
<a moz-do-not-send="true" href="http://www.abrahamsolar.com"
target="_blank">www.abrahamsolar.com</a><br>
<br>
Voice: 970-731-4675<br>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
List sponsored by Home Power magazine
List Address: <a class="moz-txt-link-abbreviated" href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a>
Options & settings:
<a class="moz-txt-link-freetext" href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a>
List-Archive: <a class="moz-txt-link-freetext" href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a>
List rules & etiquette:
<a class="moz-txt-link-abbreviated" href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a>
Check out participant bios:
<a class="moz-txt-link-abbreviated" href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a>
</pre>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<p class="" avgcert""="" color="#000000" align="left">No virus
found in this message.<br>
Checked by AVG - <a moz-do-not-send="true"
href="http://www.avg.com">www.avg.com</a><br>
Version: 2012.0.2221 / Virus Database: 2441/5332 - Release Date:
10/14/12</p>
</blockquote>
<br>
</body>
<a></a><p class=""avgcert"" align="left" color="#000000">No virus found in this message.<br>
Checked by AVG - <a href='http://www.avg.com'>www.avg.com</a><br>
Version: 2012.0.2221 / Virus Database: 2441/5332 - Release Date: 10/14/12</p></html>