by noseoil » Wed Oct 21, 2015 7:30 am
Are you going to hang the box under the deck? If so, I would think about welding a simple angle iron frame you can "skin" inside with some plywood. Epoxy on plywood would work fine, with a metal frame to support the load and actually carry the weight. Make it so the top angle acts like the edge like the one you showed for $$$ and has some bottom support for the batteries as well (top flange which sits on the edge of the hole). It can be made sturdy without too much weight, but your batteries will be the real weight. Where will it be located?
Wondering about the need for 2 batteries. If you use solar for charging, can you get by with one battery and some sunlight during the day? 2 is a lot of juice, so you must be planning on some pretty hefty loads. What type of electrical stuff will be needing that much reserve capacity?