Domestic power plant and method for operating a domestic power plant

A domestic power plant, in particular for the self-sufficient energy provision of a residential building equipped with electricity and/or heat, comprising

• a housing comprising an external air connection and an exhaust air connection,
• a ventilation device comprising a heat exchanger, wherein the ventilation device is connected to the external air connection such that the external air can flow in a first air tract via the heat exchanger, or via an external air bypass past the heat exchanger, into a feed air tract of the domestic power plant, wherein the feed air tract runs at least partially within the housing,
• an exhaust air tract, in which an air volume flow brought about by the ventilation device can be propagated within the housing,
• a fuel cell unit, which is arranged within the housing and integrated into the exhaust air tract such that undesired gas released in the fuel cell unit can be diluted by the air volume flow and be removed together with waste heat from the fuel cell unit,
• a storage battery unit which is preferably arranged in a housing and integrated into the exhaust air tract such that undesired gas released in the storage battery unit can be diluted by the air volume flow and be removed together with waste heat from the storage battery unit, and
• a second air tract which is connected to the exhaust air tract, wherein the second air tract of the ventilation device is thermally coupled to the first air tract via the heat exchanger of the ventilation device such that it is possible for exhaust air via the second air tract to give off, as required and via the heat exchanger of the ventilation device, at least part of the thermal energy contained therein to the first air tract, and simultaneously the undesired gases diluted by the air volume flow can be expelled together with the air volume flow via the external air connection, so that the formation of explosive gas mixtures in the domestic power plant is avoided and the domestic power plant can be operated safely;
• wherein exhaust air from at least one living space to be centrally ventilated is fed through the fuel cell unit via the exhaust air tract to the second air tract, and through the heat exchanger of the ventilation device to the exhaust air connection.