Howdy Gotsmart.
I don't know much about the US grid but you can do some interesting reading on the BC Hydro website. In brief, if every private vehicle in BC were to magically switch to electric tomorrow the grid demand would go up 19 percent. The extra capacity of the grid is currently 30 percent and growing. The average house hold with an electric vehicle uses extra power equivalent of an electric water heater in an annualized sceenario.
On a personal note, when bought our first EV a couple years ago we got serious about analyzing our house for power use. We changed all the lights to LED, different thermostat, upgraded the fridge etc. End result was our power bill is lower now than before our EV purchase. We are now an all EV family. It will be interesting to see the power bill in a year.
Cheers.
