Patent ID: 7880334

Claim:
A system for connecting a fuel cell stack to an A.C. grid to provide power thereto, comprising: a D.C. to D.C. converter to be coupled to the fuel cell stack; a voltage regulated D.C. bus coupled to the D.C. to D.C. converter; a bidirectional inverter coupled to the D.C. bus, and to be coupled between the D.C. bus and the A.C. grid; and at least one D.C. auxiliary load of the fuel cell stack coupled to the D.C. bus, wherein the at least one D.C. auxiliary load of the fuel cell stack includes a load that is required for the fuel cell stack to operate, wherein the D.C. to D.C. converter is unidirectional in order to provide power from the fuel cell stack to the D.C. bus, and wherein the D.C. bus extends continuously from the D.C. to D.C. converter to the bidirectional inverter without interruption by a D.C. isolator in the D.C. bus.