Critique proposed solar battery upgrade

Not too worried about the heavy part, i’m well below payload and cargo capacity with the 5er, and I don’t remove the batteries over the winter, so no lugging them around. I guess if I was to get fussy, i’d want to build a real barrier between the space where the batteries would go in the front and the rest of the storage area (where the inverter would be) and improve the venting if I went with FLAs to minimize risk of gas buildup and possible boomf