Electricity rates and demand are insanely low during the night. In fact whole sale rates can dip into the negatives where they will literally pay you to use electricity. Aluminum smelting plants run during this time. Even if everyone suddenly started charging cars at night at the most we would be back close to daytime demand, but more math is needed.
Gotcha, that’s actually the time of peak demand and adding a whole new class of high power consumption during that time is indeed scary. In the UK for example where it’s tea time then as well and a bunch of people put on electric kettles. Utilities do a lot of work during that time load balancing and borrowing from other regions for extra power.
