Cogeneration vehicle system utilizing fuel cell car, and mobile unit as component of the system

A mobile unit including a space and equipment to be used by a user, the mobile unit being jointable to a vehicle so as to be capable of traveling while being trailed by and exchanging energy with the vehicle, and the mobile unit being jointable to an immobile facility so as to be capable of exchanging energy with the immobile facility, wherein the vehicle includes a fuel cell for generating electric power by using hydrogen as a fuel, and the immobile facility includes a space and equipment to be used by a user,

• the mobile unit comprising:
• a heat storing section for storing hot water in a water tank;
• and
• an electricity storing section for storing electric power in a storage battery,
• wherein,
• when the mobile unit is jointed to the vehicle,
• the heat storing section recovers heat produced through the power generation by the fuel cell from the vehicle, heats predetermined water with the recovered heat, and stores the heated predetermined water in a water tank,
• the electricity storing section recovers, from the vehicle, excess electric power which is generated through the power generation by the fuel cell but not needed for running the vehicle, and stores the excess electric power in the storage battery, and
• the heated predetermined water stored in the heat storing section is supplied to hot-water supplying equipment in the mobile unit, and the electric power stored in the electricity storing section is supplied to electric equipment in the mobile unit;
• and
• when the mobile unit is jointed to the immobile facility,
• the heated predetermined water stored in the heat storing section is supplied to hot-water supplying equipment in the immobile facility, and the electric power stored in the electricity storing section is supplied to electric equipment in the immobile facility.