The invention relates to an energy system for watercraft, comprising at
least one fuel cell module (6,7,8,9), preferably (a H.sub.2O.sub.2 fuel
cell module, by which at least one electric drive (17) and at least one
electrical consumer are supplied with electric energy via a supply
network. Said electrical drive (17) is an AC drive that is connected to a
DC network (2) of the supply network via at least one power inverter
(10).