CHARGE/DISCHARGE CONTROL METHOD,CHARGE/DISCHARGE CONTROL PROGRAM, CHARGE/DISCHARGE CONTROL SYSTEM, MANAGEMENT SERVER, AND STORAGE MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide users (e.g., a vehicle equipped with a storage battery) with power smoothly via a charger by installing a power supply device for supplying power separately from a utility grid at a charging station and properly managing coordination between the power supply device and power supply from the utility grid.SOLUTION: A charge/discharge control method is provided which comprises: a charger management process in which a total amount of discharges from a charger 20 is calculated and determination of whether the total amount exceeds a predetermined value is made; and a storage battery management process in which, when determined to be equal to or greater than the predetermined value by the charger management process, a differential time between a storage battery which is finished charging first in time series and a storage battery which is finished charging last in time series is calculated, a predicted charge time from a total amount charged to the storage battery which is finished charging last in time series and from the differential time is calculated, and an upper limit to the amount of discharges from a storage battery device 30 from the predicted charge time and from the stored amount of power in the storage battery device 30 is set.