The Army has an ever-increasing need for electric power units, the most important capability of which is silent operation. In addition multifuel operation, light weight, remote operation, and versatility are required. This paper describes the development of three such units (10, 20, and 30 amp) which are expected to fill this need. The units are about 3.5% efficient, but improved thermoelectric materials are expected to improve this figure.The units run on gasoline, diesel, JP-4, JP-5, and fuel oil at temperatures of −25 to 125 F and altitudes of 8000 ft with a voltage of 28 V d-c. The units range in weight 25–50 lb.