Interesting thought. If these are super cheap, at some point the foundations or the land they are on becomes a significant cost issue. Say for example if a 12 m long and 2.3 m wide standard 40 ft container weighs 16,000 kg (16 t), how many can you pile on an old parking lot?

I would assume the cost of the batteries (and then after that things like inverters) is still so high everything else is in the noise.