CAPACITY CONTROL DEVICE AND COMPUTER-READABLE MEDIUM

A capacity control device including: a storage unit for storing information representing a first energy amount and a second energy amount of an amount of energy accumulated in a power source for driving mounted on a vehicle, the first energy amount being available for power transmission and reception between the power source for driving and a power grid without an instruction from a user of the vehicle, and the second energy amount being available to the user in response to an instruction from the user; a updating unit for updating the second energy amount without updating the first energy amount, and updating the first energy amount without updating the second energy amount; and a control unit for presenting information representing the second energy amount that has been updated by the updating unit to the user.