<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">I have always been concerned with both high and low temperature. On case of a battery bank failure it was insulated with 1.5 inch foam (no acid problems) but the battery melted I think from thermal runaway and <BR><BR>--- On <B>Fri, 12/10/10, bob ellison <I><reellison@gmail.com></I></B> wrote:<BR>
<BLOCKQUOTE style="BORDER-LEFT: rgb(16,16,255) 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><BR>From: bob ellison <reellison@gmail.com><BR>Subject: Re: [RE-wrenches] To insulate a battery bank<BR>To: "'RE-wrenches'" <re-wrenches@lists.re-wrenches.org><BR>Date: Friday, December 10, 2010, 5:32 AM<BR><BR>
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<P class=yiv1045335225MsoNormal><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.</SPAN></FONT></DIV>
<P class=yiv1045335225MsoNormal><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! </SPAN></FONT></DIV>
<P class=yiv1045335225MsoNormal><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.</SPAN></FONT></DIV>
<P class=yiv1045335225MsoNormal><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.</SPAN></FONT></DIV>
<P class=yiv1045335225MsoNormal><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.</SPAN></FONT></DIV>
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