The sun, the wind, rainbows and unicorns. The EV rush is about to reveal grid limitations in some areas. Also the need for mostly nighttime EV charging will shift daily demand curve.

From a practical standpoint, a Tesla or similar EV will charge at home from a 50A circuit. This is the same as most electric clothes dryers. A 30A circuit equivalent to an electric water heater would work for most overnight charging requirements. Adding a Tesla to the fleet increased our electric consumption by about 400Kwh per month. Adding a second Tesla next year will roughly double that consumption. It's a meaningful increase in demand.