Re: [RE-wrenches] Battery Box Construction

[Allan Sindelar]

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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