FUEL CELL SYSTEM, FUEL CELL SYSTEM CONTROL METHOD, AND BUILDING

PROBLEM TO BE SOLVED: To provide a fuel cell system capable of reducing an electric storing capacity of a storage battery. SOLUTION: This system includes a fuel cell, an electric power load to consume the electric power of the fuel cell, the storage battery to store the electric power of the fuel cell, a demand control part to send electric power demanding information showing an increased amount of an electric power consumption in the case there is necessity of increasing the electric power consumption of the electric power load in advance, and a load control part in which in the case the electric power demanding information is received from the demand control part, on condition that the fuel cell can supply more electric power to the electric power load, based on the increased amount of the electric power consumption and amount of power accumulation of the storage battery shown by the electric power demanding information, timing of the electric power load increasing the electric power consumption is scheduled to have earlier timing than the time when the increased amount of the electric power supplied from the fuel cell reaches the increased amount of the electric power consumption shown by the electric power demanding information, a permission notice to show the scheduled timing is sent, and on condition that the permission notice is received, the electric power consumption of the electric power load is made to be increased by the timing shown by the permission notice. COPYRIGHT: (C)2007,JPO&INPIT