A Level 1 charging system can be plugged into most grounded electrical outlets and is usually rated for 15 amperes at 120 volts common. Level 1 chargers operate at the slowest rate, at about two to five miles per one hour of charge. Owners of vehicles with small batteries, lower mileage needs, or those who can wait several hours while their vehicle recharges may find Level 1 chargers sufficient for their needs. Level 1 chargers are a viable charging option for all electric vehicles.

A Level 2 charging system requires a dedicated 240-volt circuit and charges at a rate of 10-20 miles per one hour of charging. Level 2 chargers are appropriate for most home and commercial applications. Charging at a much faster rate than Level 1 chargers, Level 2 chargers are the most commonly available type of EVCS. As with Level 1 chargers, they are a viable charging option for all electric vehicles.

A Level 3 charging system—or DC fast charger—is used in commercial applications. It is hardwired per the manufacturer and charges at a rate of 60-80 miles per 20 minutes of charging. Though the fastest type of EVCS, not all electric vehicles are compatible with DC fast charging or may only be compatible with certain fast charging systems. Before using DC fast chargers, electric vehicle operators should first determine whether their vehicle is compatible with the charging system or whether they will need any adapters to connect to the system.