Patent ID: 8508069

Claim:
A vehicular electrical system comprising: a first direct current (DC) voltage supply including a fuel cell; a second DC voltage supply including a battery coupled to the first DC voltage supply; a first direct current-to-direct current (DC/DC) power converter coupled to the first and second DC voltage supplies; a second DC/DC power converter coupled to first and second DC voltage supplies and the first DC/DC power converter; and a power receptacle electrically connected to the second DC/DC power converter, a processing system in operable communication with the first and second DC voltage supplies, the first and second DC/DC power converters and the processing system: operates the second DC/DC power converter to limit power provided to the power receptacle based on an available voltage of the fuel cell and the battery; and operates the second DC/DC power converter to limit power provided to the power receptacle based on a voltage threshold, wherein the second DC/DC power converter regulates power flow between the first and second voltage supplies and the power receptacle such that both the first and second voltage supplies supply power to an external load coupled to the power receptacle.