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I'm always circling back to the idea of V2G (vehicle to grid) storage schemes to help solve the problem of intermittency of power generation. Whenever you can kill 2 stones with 1 bird, it has my interest.
I wonder how much of a buffer would be reasonably available if 50% of households had EVs connected to the grid? Average household consumption rate is 1.2 kW. EVs could reasonably be expected to output 6-9 kW back to the grid, so they could support 6 households for every connected EV, and that's assuming the need to provide 100% of the electrical needs instead of some "make up" portion.
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