Large data centers often need load banks for testing or exercising electrical equipment from time to time especially after maintenance procedures have taken place and the maintenance staff wants to test the system to make 100% certain the equipment will operate when the time comes for it to operate. Testing generators is one use for these stationary load banks and load banks can also be used for testing UPS (universal power supplies). This load bank provides a resistive load to generators and UPS systems inside a large data center. The load bank can be stepped up to various Kilowatt levels so a range of KWs can be used to test the range of the generator from a small load to 100% of the KW rating of the generator. Load banks can also be portable on a trailer so it can be moved from place to place for testing electrical equipment.