<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Hi Eric,</div><div><br></div><div>While agree with most all your assessments, </div><div>Can you please elaborate on the "sulfation causes the voltage not to climb?"</div><div><br></div><div>This is quite counter to what I have seen and what the battery people say?</div><div><br></div><div>Thanks</div><div><br></div><div>Jay</div><div><br></div><div>Peltz power</div><div><br>Sent from my iPad</div><div><br>On Jul 23, 2013, at 2:48 PM, <a href="mailto:Eric.Bentsen@schneider-electric.com">Eric.Bentsen@schneider-electric.com</a> wrote:<br><br></div><blockquote type="cite"><div>
<br><font size="2" face="sans-serif">Hi William,</font>
<br>
<br><font size="2" face="sans-serif"> If the SG was 1.26, of course
the battery voltage would increase </font>
<br><font size="2" face="sans-serif">quickly to >30V (which is high for
warm weather, BTW).</font>
<br><font size="2" face="sans-serif"> It has been my experience that
sulfation causes the voltage NOT to climb. Especially when you have a very
large bank, and a</font>
<br><font size="2" face="sans-serif"> relatively small amount of solar.</font>
<br><font size="2" face="sans-serif"> Sometimes it is necessary to reduce
the bank size into smaller sets to equalize them and recover their performance.</font>
<br><font size="2" face="sans-serif">This method of reducing bank size is
also effective to compare performance and weed out a potentially bad battery.
</font>
<br><font size="2" face="sans-serif"> Systems that have a lot of capacity,
with a relatively small amount of charge current usually creates problems,
because</font>
<br><font size="2" face="sans-serif"> the load demand exceeds solar
production.</font>
<br><font size="2" face="sans-serif"> This results in batteries that
operate with partial SOC, which is when sulfation is most prevalent. With
(8) L16s, you have approx</font>
<br><font size="2" face="sans-serif"> 800Ahrs of capacity (24V bank).
It would take significantly more than 8A of charge current to properly
care for a bank that size.</font>
<br>
<br><font size="2" face="sans-serif">Rgds,<br>
</font><font size="3" color="#008000">_____________________________________________________________________________________</font><font size="3">
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Eric Bentsen</b> | </font><font size="1" color="#008000" face="Arial"><b>
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