Don't downvote this one! There's a bunch of issues on this that are hard to judge. The obvious one is power availability. Likely solveable, but not trivial. The

Don't downvote this one! There's a bunch of issues on this that are hard to judge. The obvious one is power availability. Likely solveable, but not trivial. The non obvious one is the grid itself. A lot of grid systems are overloaded already. And this is fine. They run hot during the day, they cool off at night, and by morning they're good to go. Electric vehicles demand a lot of power. Even if you're doing it at night, it's going to add a lot of heat to the system. It's going to be an expensive and difficult thing to solve if transformers start dropping like flies during a heatwave.