Level 2 electric vehicle supply equipment (EVSE) provides charging through a 240 V AC plug. Level 2 adds about 10 to 60 miles of range to a vehicle per hour of charging time, making it far more convenient than standard 120 V AC charging, which adds about 2 to 5 miles per hour of charging. Additionally, level 2 charging is a more energy-efficient method of charging, as most EV have on-board components that require additional electricity the entire time the EV is plugged in.