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<DIV><FONT size=2 face=Arial>I recommend insulation. In general, operating
temperature is very important. Batteries last longer if kept cool. However, a
battery below 60 degrees F (15.5 C) has reduced capacity. Temperatures above 77
F (25 C) increase capacity only slightly but they significantly reduce battery
life. Batteries operating regularly above 85 F (29.4 C) lose have their
operating life.</FONT></DIV>
<DIV><FONT size=2 face=Arial>Joel Davidson</FONT></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=reellison@gmail.com href="mailto:reellison@gmail.com">bob ellison</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=re-wrenches@lists.re-wrenches.org
href="mailto:re-wrenches@lists.re-wrenches.org">'RE-wrenches'</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, December 10, 2010 3:32
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [RE-wrenches] To insulate a
battery bank</DIV>
<DIV><BR></DIV>
<DIV class=WordSection1>
<P class=MsoNormal><FONT color=black size=4 face=Calibri><SPAN
style="COLOR: black; FONT-SIZE: 14pt">With the amount of lead in a battery
bank it changes temperature very slowly. Both gaining and losing heat is a
very slow process.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=black size=4 face=Calibri><SPAN
style="COLOR: black; FONT-SIZE: 14pt">I have never insulated battery banks, if
in a cold area like here we size them larger for the slower reaction time in
the winter anyway. Part of the reason being that I would bet that the acid
would raise hell with the insulation! <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=black size=4 face=Calibri><SPAN
style="COLOR: black; FONT-SIZE: 14pt">We regularly see battery banks that are
40 degrees or so it presents no problem.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=black size=4 face=Calibri><SPAN
style="COLOR: black; FONT-SIZE: 14pt">If the exhaust fan is running in a 70
degree building all it does is draw the warm air over the top of the battery
and not really warm them much anyway, in an unheated building it will probably
not make much difference.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT color=black size=4 face=Calibri><SPAN
style="COLOR: black; FONT-SIZE: 14pt">The only way that I would put insulation
in an unheated battery box is on the outside of the plywood, away from the
acid and gasses. I would also make it removable in the
summer.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT size=4 face=Calibri><SPAN
style="FONT-SIZE: 14pt"><o:p> </o:p></SPAN></FONT></P></DIV>
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href="http://www.avg.com">www.avg.com</A><BR>Version: 10.0.1170 / Virus
Database: 426/3305 - Release Date: 12/09/10</P>
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