Fuel cell powered ring bus architectures

A fuel cell power system comprising:

• a ring bus;
• a plurality of bidirectional uninterruptable power supplies (UPSs), each electrically coupled to at least one battery, an AC utility feed, a load, and via a choke, to the ring bus;
• a plurality of direct current (DC) fuel cell modules, each including one or more fuel cells coupled to a hydrogen storage;
• and
• a plurality of bidirectional DC-DC power converters, each electrically coupled to a corresponding one of the plurality of DC fuel cell modules and a corresponding one of the plurality of bidirectional UPSs.

A fuel cell power system comprising:

• a direct current (DC) ring bus;
• a plurality of DC fuel cell modules, each including one or more fuel cells coupled to a hydrogen storage;
• and
• a plurality of bidirectional DC uninterruptable power supplies (DC-UPSs), each electrically coupled to at least one battery, a corresponding one of the plurality of DC fuel cell modules, and, via the DC ring bus, a load.