This paper describes a fuel cell system capable of delivering a peak power of 160 kW. It consists of 32 Union Carbide fuel cell modules together with the electrical and fluid system auxiliary components needed to operate and control them in a vehicle. The reactants are hydrogen and oxygen, and the modules use a circulating electrolyte, potassium hydroxide. Two of these 160 kW electric powerplants were built. One is a laboratory test bed and the second is installed in a vehicle.