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<DIV><FONT size=2 face=Arial>William,</FONT></DIV>
<DIV><FONT size=2 face=Arial>Do you use tall batteries like IBE? What is the
temperature difference between the bottom of your on-slab batteries and the
top?</FONT></DIV>
<DIV><FONT size=2 face=Arial>Joel Davidson</FONT></DIV>
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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=william@millersolar.com href="mailto:william@millersolar.com">William
Miller</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=jryago@netscape.com
href="mailto:jryago@netscape.com">jryago@netscape.com</A> ; <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> Saturday, May 01, 2010 10:51
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [RE-wrenches] Ideal platform
for flooded type batteries: opinions wanted</DIV>
<DIV><BR></DIV><FONT size=3>Jeff:<BR><BR>This racking system sounds like it
would be a nightmare during an earthquake. We have a system with IBE 2
volt batteries that suffered major damage during an earthquake in our area in
2003. All of the batteries tipped over and spilled their entire contents
in the battery room. Fortunately, these batteries were slated for
replacement in the near future.<BR><BR>Now we strap all batteries to the wall
with strut and all-thread. Given the opportunity, we have the framing
reinforced during construction. We do not advertise the restraints as an
engineered solution, but rather as a common sense remedy to minor
earthquakes.<BR><BR>In our hot and cold climate. we favor placing the
batteries on a slab to thermally couple them to a more stable temperature
source. I laugh when I see an insulated battery box with large
vents. I'm not an licensed engineer, but it seems pointless to insulate
a box and then vent it.<BR><BR>We have tried the shower pan material as a
liner, but it was not acid resistant -- it degraded in two years. Now we
use 1/8" sheet neoprene and build a dam using it and pressure treat lumber to
support the rubber.<BR><BR>William Miller<BR><BR><BR><BR>At 08:47 AM 5/1/2010,
you wrote:<BR>
<BLOCKQUOTE class=cite cite="" type="cite">As you know, cold floors reduce
battery charge. We use a support "shelf" made of pressure treated 2 x
4 on EDGE, separated by 3/8" pressure treated plates every 2 feet, using 8
foot long boards. This 16" wide by 8 foot long shelf is placed on
standard concrete blocks spaced every 2 or 3 feet, keeping the shelf
8" above the floor. This puts the battery fill caps at a nice level
for re-fill, and the bottoms off the cold floor which allows good air
flow. An occasional acid spill may cause some minor issues, but we
have these shelves in systems now over 15 years old with no problems.
The are also easy to site build.<BR><BR>Jeff Yago<BR></FONT></BLOCKQUOTE>
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