Thanks for all the replies so far. I've tried foundation waterproofing
membrane for a couple of years, but found it will deteriorate in high
acid concentrations. IT gets all gooey and begins to dissolve. It had
peel N stick adhesive, and seemed like a good idea, until later. (it
was HDPE?)
I've seen construction 10 mil plastic sheeting hold a gal of acid for
many months, so I know that at least works for acid.
The pond liner looks good as well as Roy's wall plastic, but the 1/8"
polypropylene would seem to be possibly more durable for about the same
$$. Plastic welding looks relatively easy with a heat gun and special
tip on a soldering iron, too. I'll report back on what we actually do.
As always thanks for the input, and I welcome all further comments. I
feel battery enclosures are a somewhat neglected part of off grid design.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 1/28/2016 7:06 PM, frenergy wrote:
Add to the list...I've had good luck with Grace roofing underlayment:
tough and to a degree, self-healing, sticks to itself (and anything it
comes in contact with) very well making seams secure, easy to find at
building supply store, sticks aggressively to battery box sides
without mechanical fasteners, experience has shown it resists acid.
As with other solutions, something to uniformly distribute the weight
and irregular bottoms of batteries should be employed.
Bill
Feather River Solar Electric
Bill Battagin, Owner
4291 Nelson St.
Taylorsville, CA 95983
530.284.7849
www.frenergy.net
On 1/28/2016 5:35 PM, Allan Sindelar wrote:
Ray,
Just a couple of weeks ago we installed a 24V HUP set in an existing
installation. We had an existing plywood battery box made of Baltic
Birch (the 9-ply 12mm thick plywood typically used for cabinet drawer
carcases) with a liner made of 40(?)-mil pond liner material. We
removed the six cells from the steel case, set the case in place in
the plywood box and lowered the cells into it. However, the box had a
non-removable 5" wide strip across the top rear, and we needed to
slide the entire 1100 pound case back about 8" in order to fit both
steel cases.
Before setting the steel case in the box I sprayed the floor of the
pond liner with a layer of the new spray pulling lube from Klein
Tools, then set the steel case in place and lowered the cells. Using
a Porta-Power and some blocking, we slid the case into place with
little effort.
You might find that vinyl pond liner works well in a plywood box. We
found it at a Home Depot.
Allan
*Allan Sindelar*
al...@sindelarsolar.com
NABCEP Certified PV Installation Professional
NABCEP Certified Technical Sales Professional
New Mexico EE98J Journeyman Electrician
Founder (Retired), Positive Energy, Inc.
*505 780-2738 cell*
**
On 1/28/2016 3:25 PM, Ray Walters wrote:
Hi All;
We're looking to improve our battery box construction, and are
considering using 1/8" think polypropylene sheeting. I've used
small premade boxes before, but this will be for a HUP install, and
we would want to build the box around the batteries after. Does
anyone have experience/ comments on welding plastic? The
alternative would be to just seal the seams with acid resistant
caulking. (silicone, Geocell, ?)
I've had good luck in the past just using 10 mil plastic sheeting
stapled up on the inside of a plywood box, but we will be scooting
1000 lb batteries around on it, so I don't think the sheeting will
hold up.
Thanks,
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