To replace a gas station than can refuel 100 cars/hour with #superchargers that are capable of fast-charging (30mins) a 75 kWh pack, you need 50 #chargers at 150 kW each. And that's not accounting for the fact that charging is not 100% #efficient.
That's 7.5MW. If you're in that smallish town and call the power company and ask for a 7.5MW feed, they'll laugh and hang up.