The Hobart 90D20 aircraft ground power unit is designed to generate and deliver regulated, 400 hertz electrical power to a parked aircraft for operation of the aircraft’s electrical equipment when the on-board generators are not running. The engine, generator, and controls are designed into a compact, trailer-mounted, towable unit which is easily maneuverable. Victory Ground Support Equipment has many different used ground power units for sale. Contact us today if you are looking for a reconditioned used gpu for sale or rent.