Electrical and electronic equipment is designed to operate on standard supply voltage When the supply voltage is constantly too high or too low, usually more than 55% , the equipment fails to operate at maximum efficiency A buck and boost transformer is a simple and economical means of correcting this off standard voltage. More efficient. Smaller and lighter. 5 10 times increase in KVA. Versatile, many applications. Lower cost. 120 x 240 Primary Volts 12/24 Secondary Volts 60Hz.