Make it a 10ft shipping container. (1/4th size) That should be good for a full standard load of around 30 tons, with some empty space for equipment access. Mayb

Make it a 10ft shipping container. (1/4th size) That should be good for a full standard load of around 30 tons, with some empty space for equipment access. Maybe redox flow batteries will win for the grid scale use case, because it could become feasible to process the solution in-situ and save a bunch of shipping weight.