42ohmsPA, big I would think, each 4x8 sheet of treated plywood cost $40.00 each, $120.00
to make 3 sided that can only hold 4 panels.
my thinking here is half the panel collect morning sun, other half late day sun.
the only reason I made it that way is so I can remove the ballast and move them as needed.
I'm trying the point the panels between trees, I still don't have a good read on the sun's track yet.(first solar season syndrome)
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I would also suggest a cover on your IBC container, green water is not fun even if you just use it to water the garden.