MULTIPLE POWER CONDITIONER SYSTEM

PROBLEM TO BE SOLVED: To provide a multiple power conditioner system that can reduce total electricity charges by optimizing discharge control of a storage battery.SOLUTION: A storage system 30 of a multiple power conditioner system 10 has an electrical energy storage section 37a for holding past used energy of a load R and past generated energy of a photovoltaic system 20 in association with past dates; an electricity rate storage section 37b for holding electricity rates; an optimum discharge information storage section 37c for holding discharge time and maximum discharge power of a storage battery 31 calculated on the basis of the used energy, generated energy and electricity rates so as to minimize daily total electricity charges in association with past dates; and a control arithmetic section 36 for specifying the day before the preceding day that is most correlated with the preceding day by reference to the electrical energy storage section 37a, and controlling a drive section 35 on the basis of the discharge time and maximum discharge power of the day after the specified day held in the optimum discharge information storage section 37c.