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<div class="moz-cite-prefix">I have installed/serviced thousands of
battery based systems, I have not seen any reversed cells either,
but I know how it happens.<br>
<br>
Here's a thought on what could cause multiple lower capacity cells
in a bank. From the moment a battery is not being charged,
including newly assembled batteries, it is self discharging and
lead sulfate is forming on the plates. If left uncharged or
undercharged for months, which could be date of assembly to date
of installation, the capacity could be affected due to ionic
bonding (a level 2 sulfate bond blocking SO4 from finishing the
electrochemical process by discharging its electron to Pb). Simply
put, less surface area is available so there is less capacity.
Unless the installation date is within 60 days or less of the
manufacturing date, this could happen.<br>
<br>
If these damaged batteries were then mixed with healthy ones, this
could account for multiple low capacity cells and the scenario I
described in my previous email would apply. <br>
<pre class="moz-signature" cols="72">
Larry Crutcher
Starlight Solar Power Systems
</pre>
On 12/19/14 12:23 PM, Jay Peltz wrote:<br>
</div>
<blockquote cite="mid:C4B2BB92-11AF-4608-A3B5-29719EE2C597@asis.com"
type="cite">
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<div>I find it really curious. </div>
<div>I've been dealing with batteries for almost 20 yrs. I've seen
so many dead, flat batteries, systems etc I can't count them
all. </div>
<div>But I've yet to find a reversed one. </div>
<div>I understand the process. </div>
<div><br>
</div>
<div>I'm trying to understand how he could get multiple reversed
batteries at one go?</div>
<div><br>
</div>
<div>Jay </div>
<div>Peltz power </div>
<div><br>
<br>
Sent from my iPhone</div>
<div><br>
On Dec 19, 2014, at 9:47 AM, <a moz-do-not-send="true"
href="mailto:Jarmo.Venalainen@schneider-electric.com">Jarmo.Venalainen@schneider-electric.com</a>
wrote:<br>
<br>
</div>
<blockquote type="cite">
<div><font face="sans-serif" size="2">Hi:</font>
<br>
<br>
<font face="sans-serif" size="2">This cell reversal ability of
lead acid
batteries gives good perspective on just how much you can
mistreat them
and beat them up and still have an expectation of
"recovery".</font>
<br>
<br>
<font face="sans-serif" size="2">Lithium cells on the other
hand without
a full range of protections would have long since filled the
home with
all kinds of interesting high temperature thermal events,
gaseous compounds
and chemicals, and there is no way you could get that magic
smoke back
into them.</font>
<br>
<br>
<font face="sans-serif" size="2">JARMO <br>
</font><font color="#008000" size="3">_____________________________________________________________________________________</font><font
size="3">
<br>
</font><font face="Arial" size="1"><b><br>
Jarmo Venalainen</b> | </font><font color="#008000"
face="Arial" size="1"><b>
Schneider Electric </b></font><font face="Arial" size="1"><b>
| Solar
Business</b> | <b>CANADA</b> | <b>Training &
Development Specialist - Senior</b> <b><br>
Phone:</b> +604-422-2528 | <b>Fax:</b> +604-420-1591
|
<b>Mobile:</b> +604-505-0291 <b><br>
Email:</b> </font><a moz-do-not-send="true"
href="mailto:jarmo.venalainen@schneider-electric.com"><font
color="blue" face="Arial" size="1"><u>jarmo.venalainen@schneider-electric.com</u></font></a><font
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href="http://www.sesolar.com/" target="_blank"><font
color="blue" face="Arial" size="1"><u>
www.SEsolar.com</u></font></a><font face="Arial"
size="1"> |
<b>Address:</b> 3700 Gilmore Way, Burnaby, BC V5G4M1 <br>
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</font>
<br>
<br>
<br>
<table width="100%">
<tbody>
<tr valign="top">
<td><font color="#5f5f5f" face="sans-serif" size="1">From:</font>
</td>
<td><font face="sans-serif" size="1">Corey Shalanski
<<a moz-do-not-send="true"
href="mailto:cshalanski@joule-energy.com">cshalanski@joule-energy.com</a>></font>
</td>
</tr>
<tr valign="top">
<td><font color="#5f5f5f" face="sans-serif" size="1">To:</font>
</td>
<td><font face="sans-serif" size="1"><a
moz-do-not-send="true"
href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>,
</font>
</td>
</tr>
<tr valign="top">
<td><font color="#5f5f5f" face="sans-serif" size="1">Date:</font>
</td>
<td><font face="sans-serif" size="1">12/19/2014 06:48 AM</font>
</td>
</tr>
<tr valign="top">
<td><font color="#5f5f5f" face="sans-serif" size="1">Subject:</font>
</td>
<td><font face="sans-serif" size="1">Re: [RE-wrenches]
Magnum System - Discharged
Battery Bank</font>
</td>
</tr>
<tr valign="top">
<td><font color="#5f5f5f" face="sans-serif" size="1">Sent
by:</font>
</td>
<td><font face="sans-serif" size="1">"RE-wrenches" <<a
moz-do-not-send="true"
href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>></font></td>
</tr>
</tbody>
</table>
<br>
<hr noshade="noshade">
<br>
<br>
<br>
<font size="3">Update on my investigation:</font>
<br>
<font size="3">I visited the customer's house yesterday to set
up a pulse
charger. Much to my surprise the three batteries that
originally registered
negative voltage are now reading positive. Does this make
sense - are batteries
able to shift between negative and positive voltages at such
a low charge
level?</font>
<br>
<br>
<font size="3">I do not see any evidence of distorted cases.</font>
<br>
<br>
<br>
<font size="3">On Thu, Dec 18, 2014 at 7:58 AM, <</font><a
moz-do-not-send="true" href="mailto:jay@asis.com"><font
color="blue" size="3"><u>jay@asis.com</u></font></a><font
size="3">>
wrote:</font>
<br>
<font size="3"><br>
I second tump.<br>
Most likely a bad /cell battery took out the system.<br>
As these are VRLA batteries, I'm curious do,the cases look
damaged such
as expanded or sunk in?<br>
<br>
Jay<br>
Peltz power</font>
<br>
<font size="3"><br>
______________________________________________________________________</font></div>
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