Abstract: An exemplary method of providing electrical power is provided. A first alternating current is received from a grid. The first alternating current is converted to a first direct current using a first inverter in electrical communication with the grid. The first inverter is also in electrical communication with a fuel cell system. The first direct current is converted to a second alternating current using a second inverter, and the second alternating current is provided to a load.

Abstract: A method for charging electric vehicles includes receiving information regarding an electric vehicle. At least a portion of the information is received through a vehicle interface configured to place a battery of the electric vehicle into electrical communication with a fuel cell system. A charge is delivered from the fuel cell system to the battery of the electric vehicle through the vehicle interface without use of a direct current to alternating current (DC/AC) converter. The charge is delivered based at least in part on the information.

Abstract: Systems and methods for power conversion are illustrated. Power conversion architecture for fuel cell systems in particular are described that use dual bus architectures having stack segment pairs and a center-tapped neutral line, and/or an architecture employing integer multiple of three DC/DC converter branches.

Abstract: Systems, methods and devices for power generation systems are described. In particular, embodiments of the invention relate to the architecture of power conditioning systems for use with fuel cells and methods used therein. More particularly, embodiments of the present invention relate to methods and systems usable to reduce ripple currents in fuel cells.

Abstract: At least one aspect is directed to an uninterruptible power supply that includes a first input having an input line connection and an input neutral connection to receive a first input voltage from a first voltage source, a second input to receive a second input voltage from a second voltage source, and a boost circuit configured to provide a positive output DC voltage with respect to the input neutral connection and a negative output DC voltage with respect to the input neutral connection in both a line mode of operation and a backup mode of operation. The power supply also includes a first connection circuit to couple the first input to the boost circuit in the line mode of operation, and a second connection circuit to couple the second input to the boost circuit in the backup mode of operation, the second connection circuit being configured to isolate the second voltage source from the input neutral connection in the line mode of operation.