The batteries are Li-ion technology, made from upcycled modules from Gen1 Nissan Leaf modules. We have installed a BMS that sets top voltage at 59V, bottom voltage at 44V, but we can configure this to work with inverters that cut out before going that high or low. They have a maximum current of 60A, though we've never actually gone above 18A in/out on our 10.5KW system. With 15A coming in from the charge controller, they reach full charge from the low-end shutoff in about 40 minutes.

Your description of how to install the hoop house is pretty much what we did. The problem we have is that the valley where we installed it tends to induce whirlwinds, so we're unable to orient it against prevailing winds. We've decided to build a timber frame greenhouse in that area, and try the hoop house in one of the calmer fields.