Charge calculation apparatus, charge calculation system, and charge calculation method

A method for controlling electric charging, the method comprising:

• storing, in a memory, a plurality of IDs of a plurality of external devices, each ID of the plurality of IDs uniquely identifying each external device of the plurality of external devices;
• receiving, from an external device of the plurality of external devices, an ID of the external device;
• determining, using circuitry, whether the received ID of the external device is stored in the memory;
• controlling charging of the external device from a power server that receives power from a non-power-grid source in a case where it is determined that the received ID of the external device is stored in the memory;
• and
• inquiring of an external server about the received ID in a case where it is determined that the received ID of the external device is not stored in the memory.

A non-transitory computer readable medium including executable instructions, which when executed by a computer cause the computer to execute a method for controlling electric charging, the method comprising:

• storing, in a memory, a plurality of IDs of a plurality of external devices, each ID of the plurality of IDs uniquely identifying each external device of the plurality of external devices;
• receiving, from an external device of the plurality of external devices, an ID of the external device;
• determining whether the received ID of the external device is stored in the memory;
• controlling charging of the external device from a power server that receives power from a non-power-grid source in a case where it is determined that the received ID of the external device is stored in the memory;
• and
• inquiring of an external server about the received ID in a case where it is determined that the received ID of the external device is not stored in the memory.