<HTML><HEAD>
<STYLE><!--
.hmmessage P
{
margin:0px;
padding:0px
}
body.hmmessage
{
font-size: 10pt;
font-family:Tahoma
}
--></STYLE>
</HEAD>
<BODY dir=ltr class=hmmessage>
<DIV dir=ltr>
<DIV style="FONT-FAMILY: 'Arial'; COLOR: #000000; FONT-SIZE: 10pt">
<DIV>From a reliability standpoint I would never want to bet the farm on one
string. All it takes is the failure of one cell and the system is useless
until it is replaced. Three strings means a cell failure only reduces
capacity by 33% not 100%. I’ve always thought in off-grid systems it is a
good idea to build in as much redundancy as possible whenever possible.
Oh, and always use a buss bar system with multiple strings, it makes for a far
more stable system with less stress on the batteries.</DIV>
<DIV> </DIV>
<DIV>Tom</DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV
style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT: normal; TEXT-DECORATION: none">
<DIV style="FONT: 10pt tahoma">
<DIV> </DIV>
<DIV style="BACKGROUND: #f5f5f5">
<DIV style="font-color: black"><B>From:</B> <A title=wayne@pureenergysolar.com
href="mailto:wayne@pureenergysolar.com">Wayne Irwin</A> </DIV>
<DIV><B>Sent:</B> Tuesday, May 31, 2011 11:49 AM</DIV>
<DIV><B>To:</B> <A title=re-wrenches@lists.re-wrenches.org
href="mailto:re-wrenches@lists.re-wrenches.org">Wrenches</A> </DIV>
<DIV><B>Subject:</B> [RE-wrenches] 24 volt Battery Bank
comparison</DIV></DIV></DIV>
<DIV> </DIV></DIV>
<DIV
style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT: normal; TEXT-DECORATION: none">Hello
Esteemed Battery Gurus,<BR><BR>Which of the following do you believe is the
better 24 V battery bank?<BR><BR>A) 13 - Rolls 2-YS-31 2430 AH @ 20 HR (one
string) <BR><BR>or <BR><BR>B) 9 - Rolls 8-CS-25P 820 AH @ 20 HR (3 strings
of 3)<BR><BR>Thank you in advance for your input!<BR><BR><BR><FONT
color=#76923c>Wayne Irwin</FONT><FONT color=#76923c>, EE<BR>Director of
Engineering<BR></FONT><FONT color=#76923c>Pure Energy Solar International Inc.
</FONT><FONT color=#76923c><BR></FONT><FONT color=#76923c></FONT><FONT
color=#76923c>State Licensed Solar Contractor</FONT><FONT
color=#76923c><BR></FONT><FONT color=#76923c>License # CVC56695 </FONT><BR><A
href="mailto:PureEnergySolar@hotmail.com">mailto:PureEnergySolar@hotmail.com</A>
<BR><A href="http://pureenergysolar.net/"
target=_blank>http://pureenergysolar.com</A> <BR><FONT color=#76923c>352
377-6527 Office</FONT><FONT color=#76923c><BR></FONT><FONT color=#76923c>352
336-3299 Fax</FONT><FONT color=#76923c><BR></FONT><FONT color=#76923c>352
316-1637 Cell</FONT><BR>
<P class=ecxecxecxEC_EC_EC_EC_EC_MsoNormal><FONT color=#76923c><SPAN
style="FONT-FAMILY: 'Arial','sans-serif'; FONT-SIZE: 10pt">The content of this
message is Pure Energy Solar Confidential. If you are not the intended recipient
and have received this message in error, any use or distribution is prohibited.
Please notify me immediately by reply e-mail and delete this message from your
computer system. Thank you.</SPAN></FONT></P><BR><BR>
<P>
<HR>
_______________________________________________<BR>List sponsored by Home Power
magazine<BR><BR>List Address: RE-wrenches@lists.re-wrenches.org<BR><BR>Options
&
settings:<BR>http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org<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>
<P>
<HR>
<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: 10.0.1375 / Virus
Database: 1509/3671 - Release Date: 05/31/11</P></DIV></DIV></DIV></BODY></HTML>