Filling your gas tank is equivalent to ~0.5megawatts; your house is 50kilowatts (usually a 240V 200A service), so we can't use electric cars in the same way we use gasoline cars. They're only useful for trips around town, which is what, 90% of miles driven?
"gas tank is equivalent to ~0.5megawatts", just to be more clear, could you say how many hours of driving are you assuming the gas fill will last, since your measurement is in terms of power?
