Some backwards state/local governments still forbid billing by kWh nominally to "protect" consumers from electricity resale and markup. So one gets around it by renting a parking space with electrical power by the minute. Just as one rents a hotel room with electricity provided.So your not paying by the cost of electricity (kWh) your paying by time or how whatever the owner wants to charge?
Do any places charge by the kWh of actual electricity you are filling up with?