Charging management system, charging management device, and charging management method

A charging management device comprising:

• a vehicle management part that manages an amount of renewable energy stored in an in-vehicle power storage device of each of a plurality of electric vehicles, which have the in-vehicle power storage device that charges the renewable energy and grid energy supplied from a charging station when the in-vehicle power storage device is electrically connected to the charging station, the renewable energy being generated by a power generation device and the grid energy being supplied from a grid energy source, wherein
• the vehicle management part includes a power consumption acquisition part that acquires an estimated value of power consumption per predetermined period of each of the plurality of electric vehicles, and
• in a case where charging of each of the plurality of electric vehicles is performed using energy from the charging station, the vehicle management part preferentially charges the renewable energy to an electric vehicle having the greater estimated value.

A charging management method causing a computer to execute a process comprising:

• managing an amount of renewable energy stored in an in-vehicle power storage device of each of a plurality of electric vehicles, which have the in-vehicle power storage device that charges the renewable energy and grid energy supplied from a charging station when the in-vehicle power storage device is electrically connected to the charging station, the renewable energy being generated by a power generation device and the grid energy being supplied from a grid energy source, wherein
• the method causes the computer to acquire an estimated value of power consumption per predetermined period of each of the plurality of electric vehicles, and
• in a case where charging of each of the plurality of electric vehicles is performed using energy from the charging station, the method causes the computer to preferentially charge the renewable energy to an electric vehicle having the greater estimated value.