Ray,
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be out of date but the steel case on the older HUP batteries had drain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.
Kent Osterberg
Blue Mountain Solar, Inc.
R Ray Walters wrote:
I haven't seen a problem with concrete, but wood
definitely rots out when exposed to acid, including pressure treated.
(Saw a system with Battery shelving made from wood where the top
shelf collapsed from acid rot......)
Acid also eats foam board, unsticks silicon seal, and gets under
and dissolves the spray-on bed liner ( our last attempt at corrosion
protection)
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.
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.
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.
(although, we recently had an inspector require us to ground all
the cases, but there was no grounding point provided....)
R. Walters
Solar Engineer
On Apr 30, 2010, at 9:21 AM, Mick Abraham wrote:
Hi, Mechanix~
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.
Concrete is strong but it also tends to begin dissolving when battery
acid gets on it. Been there, seen that, didn't like it.
Wood could be strong but what about the dissolving problem? Would
pressure treated wood be better than white wood, redwood etc.?
OR: what else would the group advise for a support structure?
************************************************************
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?
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?
Thanks all around,
Mick Abraham, Proprietor
www.abrahamsolar.com
Voice: 970-731-4675
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