DC load banks simulate electrical loads and are used for testing and maintaining large batteries and battery systems, rotary UPS equipment, DC motors and generators, as well as other DC power supplies and equipment. This 250 AMP 120V DC load bank is best used to provide a temporary load for testing and servicing 120 V DC batteries and power supplies. This air cooled system can have an adjusted load up to 250 AMPS using 120V DC.