For those not familiar, Superchargers are the exception not the norm for charging your car. You use it to travel long distances, but not typically during your day to day commute. Superchargers are meant to be a convenience to rapidly charge your car on the go if you need it.

If you regularly charge at home, like most people do, you can get extremely low rates at night during off-peak hours. It only costs ~$0.12/kWh for us in SF. Something like $9 to charge the car from 0-100% for ~300 miles of distance.