Well even with bulk leveling, the problem persists relying on vehicle batteries, most of the storage batteries would be in use during the day. And expecting to be recharged at night.
Plus a stationary, non vibrating, battery in a climate controlled environment can be better optimized for it's role most likely. It should be allowed to develop under its own terms without vehiclular constraints. (though repurposing used car batteries is attractive)
I mean you could pump the solar back into the grid to offset power consumption during the day, but then they need lots of available batteries during the day. The musk show has panels on every roof, so the distribution needs are much less. It isn't necessarily off grid, but reduced grid dependancy (with off grid option if the power company is cost prohibitive).
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