ELECTRIC POWER DEMAND ADJUSTING DEVICE

An electric power demand adjusting device is configured to execute an acquiring process of acquiring an evaluation value ΣD for a high-rate deterioration of a secondary battery connected to a power utility grid, which results from a salt concentration unevenness in an electrolyte solution, and a discharge non-participating process of not allowing the secondary battery to participate in adjustment of discharge demand from the power utility grid when the evaluation value ΣD of the secondary battery is greater than or equal to a predetermined discharge threshold value K1.