Certainly a market for home charging stations that can follow the spot price as some tariffs offer and charge up between midnight and 5am when the price per uni

Certainly a market for home charging stations that can follow the spot price as some tariffs offer and charge up between midnight and 5am when the price per unit is cheaper due to less demand. But yes, it could be mismanaged. Equally EV's do a great virtual storage grid that if done right would smooth things out nicely energy/demand production. So whilst energy production important, being able to store that and use off-peak produced energy to come ontop during peak times is always one area that can never get enough love. I do for-see some interesting tariffs and business models and the lines between car maker and energy storage will blur. Heck in ten years time we will be using fusion over fission, at least I recall that being said for the last 20-30 years or so.