The difference between charger methods is simple. A Level 1 charger plugs into a standard 120V AC residential outlet and takes a relatively long time to charge an EV battery. A Level 2 charger uses a 240V AC power outlet (the same as an electric clothes dryer) to charge in much less time than with a Level 1 charger. Finally, DC Fast Charging uses direct current for even faster charging. More common at public charging stations, it can provide a substantial charge in as little as 45 minutes.