Fuel cell system for supplying house energy

The system has a gas generation unit heated by a gas burner and a fuel cell, preferably a polymer membrane fuel cell. Heat exchangers can optionally be arranged on feed, outlet and/or connecting lines. At least one of the heat exchangers for product water recovery has a condensate water outlet connection and a heat pump forming an evaporator with a condenser thermally connected to a return for a heating circuit. The system has a gas generation unit (1) heated by a gas burner (12) for converting hydrocarbon gas and water into hydrogen and further reformer products and a fuel cell (2), preferably a polymer membrane fuel cell, for converting the hydrogen into electrical energy and heat, whereby heat exchangers (6) can optionally be arranged on feed, outlet and/or connecting lines (5). At least one of the heat exchangers for product water recovery has a condensate water outlet connection (7) and a heat pump (8) forming an evaporator with a condenser (9) thermally connected to a return (10) for a heating circuit.