Battery information output device power supply and demand leveling system

Based on the operation schedule of the electric vehicle 10 parked in the power consumer 2, to enter the necessary capacity is the battery capacity you wish to ensure the driver corresponding to a plurality of times until the start of use of the vehicle, the battery and it outputs the license capacity for each time obtained by subtracting the required capacity from the total capacity power supply and demand control center 3. When the charge and discharge control of the battery 17 for leveling the power supply is charged and discharged within a licensed capacity of each time based on the charging and discharging command from the power supply and demand control center 3.