<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">We had a HUP cell freeze and crack once, and it didn't leak out. <div>I just double checked with Northwest Energy Storage, and they confirmed that the steel casing will contain a spill, and doesn't have drain holes.</div><div>They said that in one case, a customer overfilled the batteries, and that the casing actually held several gal.s of overflow.</div><div>Also, I mentioned previously that the casing was powder coated, its actually an epoxy coating.</div><div><br></div><div><div>
<span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div>R. Walters</div><div><a href="mailto:ray@solarray.com">ray@solarray.com</a></div><div>Solar Engineer</div><div><br class="khtml-block-placeholder"></div><div><br class="khtml-block-placeholder"></div><br class="Apple-interchange-newline"></span>
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<br><div><div>On Apr 30, 2010, at 11:06 AM, Kent Osterberg wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">
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Ray,<br>
<br>
I haven't installed any HUP batteries in several years so my info may
be out of date but the steel case on the older HUP batteries had drain
holes on the bottom.<br>
<br>
Kent Osterberg<br>
Blue Mountain Solar, Inc.<br>
<br>
<br>
<br>
R Ray Walters wrote:
<blockquote cite="mid:7C153B02-2C8F-4118-8631-1DF317396F48@solarray.com" type="cite">I haven't seen a problem with concrete, but wood
definitely rots out when exposed to acid, including pressure treated.
<div>(Saw a system with Battery shelving made from wood where the top
shelf collapsed from acid rot......)<br>
<div>Acid also eats foam board, unsticks silicon seal, and gets under
and dissolves the spray-on bed liner ( our last attempt at corrosion
protection)<br>
<div><br>
</div>
<div>I worked on one system with a simple lining made of heavy
plastic sheeting, that actually contained long term several gallons of
acid from a set of cracked L16s.</div>
<div>The plastic options mentioned would probably be good, if they're
not too expensive. I've had the plastic tubs crack from the battery
weight though.</div>
<div>Since HUPS come in a powder coated heavy plate steel container
that hold any spills if the inner liner is damaged, I haven't tried to
exceed the manufacturer's efforts.</div>
<div>(although, we recently had an inspector require us to ground all
the cases, but there was no grounding point provided....)<br>
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<div>R. Walters</div>
<div><a moz-do-not-send="true" href="mailto:ray@solarray.com">ray@solarray.com</a></div>
<div>Solar Engineer</div>
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<div>On Apr 30, 2010, at 9:21 AM, Mick Abraham wrote:</div>
<br class="Apple-interchange-newline">
<blockquote type="cite">Hi, Mechanix~<br>
<br>
My "customer du monde" has a dirt floor in the battery space but he's
willing to build something on which we could place his "wet" type
batteries. <br>
<br>
Concrete is strong but it also tends to begin dissolving when battery
acid gets on it. Been there, seen that, didn't like it.<br>
<br>
Wood could be strong but what about the dissolving problem? Would
pressure treated wood be better than white wood, redwood etc.?<br>
<br>
OR: what else would the group advise for a support structure?<br>
<br>
************************************************************<br>
<br>
The above questions assume that whatever we do will probably get wet,
but that may be too pessimistic. Could someone give me a mini-review of
plastic trays which would protect whatever goes beneath? <br>
<br>
I'm pretty sure polypropylene is the right type plastic but short of
custom welding by a plastic fabricator...where can I find trays which
fit OK with floor scrubber type battery case dimensions?<br>
<br>
Thanks all around,<br>
<br clear="all">
Mick Abraham, Proprietor<br>
<a moz-do-not-send="true" href="http://www.abrahamsolar.com/">www.abrahamsolar.com</a><br>
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