<br><font size=2 face="sans-serif">Hi Jay,</font>
<br><font size=2 face="sans-serif">This has happened to me personally,
and to other customers I have dealt with over the years. In my case, I
got my hands </font>
<br><font size=2 face="sans-serif">on (4) used Interstate Workaholic L16
batteries. I was unable to achieve an acceptable SG because the voltage
would not</font>
<br><font size=2 face="sans-serif">climb above 14V (using 20A charger).
I used a clamp-on DC amp meter to verify a full 20A going into the batteries,
but the voltage</font>
<br><font size=2 face="sans-serif"> would not climb any higher. It
was as if energy was being lost within the batteries. When I separated
the bank into sets of two, </font>
<br><font size=2 face="sans-serif">the ratio of current-to-capacity was
improved and I was able to equalize the daylights out of them, and eventually
recovered </font>
<br><font size=2 face="sans-serif">their performance. I have heard of the
condition where the battery has low SOC, and the charger causes the voltage
to increase </font>
<br><font size=2 face="sans-serif">very quickly, but I cannot definitely
attribute that to sulfation. It sounds more like an internal open circuit
condition. I do know it </font>
<br><font size=2 face="sans-serif">usually results in the need to replace
the batteries. </font>
<br><font size=2 face="sans-serif">Rgds<br>
</font><font size=3 color=#008000>_____________________________________________________________________________________</font><font size=3>
<br>
</font><font size=1 face="Arial"><b><br>
Eric Bentsen</b> | </font><font size=1 color=#008000 face="Arial"><b>
Schneider Electric </b></font><font size=1 face="Arial"><b> | Solar
Business</b> | <b>UNITED STATES</b> | <b>Technical
Support Representative</b> <b><br>
Phone:</b> +(650) 351-8237 ext. 001# | <b><br>
Email:</b> </font><a href="mailto:eric.bentsen@schneider-electric.com"><font size=1 color=blue face="Arial"><u>eric.bentsen@schneider-electric.com</u></font></a><font size=1 face="Arial">
| <b>Site:</b></font><a href="http://www.schneider-electric.com/solar" target=_blank><font size=1 color=blue face="Arial"><u>
www.schneider-electric.com/solar</u></font></a><font size=1 face="Arial">
| <b>Address:</b> 250 South Vasco Rd., Livermore, CA 94551
<br>
</font><font size=1 color=blue face="Arial"><u><br>
</u></font><a href="www.schneider-electric.com/solar"><img src=cid:_2_0D33EC4C0D359480004FB46F88257BB2></a><font size=1 color=#00a000 face="Arial"><br>
*** Please consider the environment before printing this e-mail</font><font size=1 face="Arial">
</font><font size=3><br>
</font>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td><font size=1 color=#5f5f5f face="sans-serif">From:</font>
<td><font size=1 face="sans-serif">jay peltz <jay@asis.com></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">07/23/2013 07:33 PM</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] Tri-Star MPPT</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-bounces@lists.re-wrenches.org</font></table>
<br>
<hr noshade>
<br>
<br>
<br><font size=3>Hi Eric,</font>
<br>
<br><font size=3>While agree with most all your assessments, </font>
<br><font size=3>Can you please elaborate on the "sulfation causes
the voltage not to climb?"</font>
<br>
<br><font size=3>This is quite counter to what I have seen and what the
battery people say?</font>
<br>
<br><font size=3>Thanks</font>
<br>
<br><font size=3>Jay</font>
<br>
<br><font size=3>Peltz power</font>
<br><font size=3><br>
Sent from my iPad</font>
<br><font size=3><br>
On Jul 23, 2013, at 2:48 PM, </font><a href="mailto:Eric.Bentsen@schneider-electric.com"><font size=3 color=blue><u>Eric.Bentsen@schneider-electric.com</u></font></a><font size=3>
wrote:<br>
</font>
<br><font size=2 face="sans-serif"><br>
Hi William,</font><font size=3> <br>
</font><font size=2 face="sans-serif"><br>
If the SG was 1.26, of course the battery voltage would increase <br>
quickly to >30V (which is high for warm weather, BTW).</font><font size=3>
</font><font size=2 face="sans-serif"><br>
It has been my experience that sulfation causes the voltage NOT to climb.
Especially when you have a very large bank, and a</font><font size=3> </font><font size=2 face="sans-serif"><br>
relatively small amount of solar.</font><font size=3> </font><font size=2 face="sans-serif"><br>
Sometimes it is necessary to reduce the bank size into smaller sets to
equalize them and recover their performance.</font><font size=3> </font><font size=2 face="sans-serif"><br>
This method of reducing bank size is also effective to compare performance
and weed out a potentially bad battery. <br>
Systems that have a lot of capacity, with a relatively small amount of
charge current usually creates problems, because</font><font size=3> </font><font size=2 face="sans-serif"><br>
the load demand exceeds solar production.</font><font size=3> </font><font size=2 face="sans-serif"><br>
This results in batteries that operate with partial SOC, which is when
sulfation is most prevalent. With (8) L16s, you have approx</font><font size=3>
</font><font size=2 face="sans-serif"><br>
800Ahrs of capacity (24V bank). It would take significantly more than
8A of charge current to properly care for a bank that size.</font><font size=3>
<br>
</font><font size=2 face="sans-serif"><br>
Rgds,</font><font size=3 color=#008000><br>
_____________________________________________________________________________________</font><font size=3>
</font><font size=1 face="Arial"><b><br>
<br>
Eric Bentsen</b> | </font><font size=1 color=#008000 face="Arial"><b>
Schneider Electric </b></font><font size=1 face="Arial"><b> | Solar
Business</b> | <b>UNITED STATES</b> | <b>Technical
Support Representative</b> <b><br>
Phone:</b> +(650) 351-8237 ext. 001# | <b><br>
Email:</b> </font><a href="mailto:eric.bentsen@schneider-electric.com"><font size=1 color=blue face="Arial"><u>eric.bentsen@schneider-electric.com</u></font></a><font size=1 face="Arial">
| <b>Site:</b></font><a href="http://www.schneider-electric.com/solar" target=_blank><font size=1 color=blue face="Arial"><u>
www.schneider-electric.com/solar</u></font></a><font size=1 face="Arial">
| <b>Address:</b> 250 South Vasco Rd., Livermore, CA 94551
</font><font size=1 color=blue face="Arial"><u><br>
</u></font>
<br>
<br><font size=3><br>
______________________________________________________________________<br>
This email has been scanned by the Symantec Email Security.cloud service.<br>
______________________________________________________________________</font><tt><font size=2>_______________________________________________<br>
List sponsored by Home Power magazine<br>
<br>
List Address: RE-wrenches@lists.re-wrenches.org<br>
<br>
Change email address & settings:<br>
</font></tt><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org"><tt><font size=2>http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</font></tt></a><tt><font size=2><br>
<br>
List-Archive: </font></tt><a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org"><tt><font size=2>http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</font></tt></a><tt><font size=2><br>
<br>
List rules & etiquette:<br>
</font></tt><a href="www.re-wrenches.org/etiquette.htm"><tt><font size=2>www.re-wrenches.org/etiquette.htm</font></tt></a><tt><font size=2><br>
<br>
Check out participant bios:<br>
</font></tt><a href="www.members.re-wrenches.org"><tt><font size=2>www.members.re-wrenches.org</font></tt></a><tt><font size=2><br>
<br>
</font></tt>
<br>
<br>