Hmm… someone that can’t tell the difference between kW and kWh should not be writing about electricity.
A typical Tesla owner will charge at around 32 to 40 amps on a 240 volt circuit. To charge for a typical day’s worth of driving at 40 miles, the vehicle needs about 14 kWh. On a 40A circuit, that’s about 1.5 hours of charging. It is likely that when that Tesla is charging, the home’s 30A electric oven is not on, which means the additional load is all of 2 to 10 amps as compared to an electric oven. Most people’s homes electrical service is designed at 100 to 200 amps, so even at 50% load factor spread across the neighborhood, that’s 50A for each house.
Then take a look at the CAISO duck curve graphs, the overnight versus evening peak is roughly a bit more than 1,500 mW. Each Tesla likely charges, at most, 10 kW overnight, or 0.01 mW. You would need 150,000 Tesla’s all charging from CAISO at the same time to hit the normal evening peak. Remember, most would only need to charge for 1.5 hours. So spread over 6 hours, one can handle 600,000 Tesla’s to hit the normal evening peak and that’s just for CAISO, not the entire U.S. grid.