What is the difference between 7kw and a 22kw EV charger?

The difference between a 7kW and 22kW EV charger is the rate at which they charge the battery. A 7kW charger will charge the battery at 7 kilowatts per hour, while a 22kW charger will charge the battery at 22 kilowatts per hour. The faster charge time of the 22kW charger is due to the higher power output.