<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Jay, <div><br></div><div>I saw that comment also. The more hardened lead sulfate becomes, the more resistant the battery is to the electrochemical process and therefore less current is drawn from the charge source. This decrease of load allows the charge voltage to rise more rapidly. This rapid rise is usually a first indicator of sulfated batteries. A healthy battery, charged at the proper rate, will always have a gradual, linear rise in voltage.</div><div><br></div><div>Just FYI, I am a hands on guy and my experience with servicing batteries is somewhat unique to our wrench group having designed, installed and serviced many hundreds of battery systems. Lead sulfation and it's cause and prevention has been an interest of mine because it is so prevalent. </div><div><br></div><div>Larry<br>
<br><div><div>On Jul 23, 2013, at 9:32 PM, jay peltz <<a href="mailto:jay@asis.com">jay@asis.com</a>> wrote:</div><br class="Apple-interchange-newline"><meta http-equiv="content-type" content="text/html; charset=utf-8"><div 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">
<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">
<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></blockquote><blockquote type="cite"><span></span><br></blockquote></div>_______________________________________________<br>List sponsored by Home Power magazine<br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br><br>Change email address & settings:<br><a 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><br><br>List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org<br><br>List rules & etiquette:<br>www.re-wrenches.org/etiquette.htm<br><br>Check out participant bios:<br>www.members.re-wrenches.org<br><br></div><br></div></body></html>