Patent ID: 7121905

Claim:
A power system for a watercraft including a propulsion system, comprising: at least one fuel cell module, adapted to produce electrical power from fuel and including at least two fuel cells coupled to one another; and a DC network, electrically coupled to the at least one fuel cell module, wherein at least one AC propulsion system for the watercraft is adapted to be coupled via an inverter unit to the DC network, wherein electrical loads are adapted to be connected to the DC network via a converter, wherein the electrical loads are AC loads adapted to be connected via an AC network to the converter, with the converter adapted to produce a constant voltage and frequency, and wherein the at least two fuel cells are adapted to be operated with reaction gas from at least one of a diesel, methanol, light gasoline and natural gas reformer for improved use of the fuel cells with respect to the safety of the power supply and non-detectability of the watercraft, with reformer gases being introduced into water that is passed through by the watercraft.