Abstract: When a communication control unit (14) in this charging control device (1) receives an inhibition command sent by a power monitoring device (2), the communication control unit instructs a signal processing unit (10) to lower a current capacity (an upper limit for a charging current). The signal processing unit (10) reduces the duty ratio of a pilot signal. As a result, the charging power supplied to an electric vehicle (200) decreases, thus making it possible to prevent the supplied power from exceeding a contract demand and minimize problems stemming from the charging of a rechargeable battery.

Abstract: A distribution board is provided in a dwelling unit in order to distribute electric power supplied from an electric power provider to branch wirings, and to supply the electric power to apparatuses (air-conditioner, dishwasher, monitor device, and the like) that are connected to the branch wirings. The distribution board includes a distribution board body that houses two or more types of internal units including a trunk switch to which a trunk wiring from the electric power provider is connected and a branch switch to which a branch wiring is connected. The distribution board body houses a communication unit that communicates with a power meter having a communication function and a control unit that performs control regarding power supply to the apparatuses based on the contents of communication with the power meter.

Abstract: When a communication control unit (14) in this charging control device (1) receives an inhibition command sent by a power monitoring device (2), the communication control unit instructs a signal processing unit (10) to lower a current capacity (an upper limit for a charging current). The signal processing unit (10) reduces the duty ratio of a pilot signal. As a result, the charging power supplied to an electric vehicle (200) decreases, thus making it possible to prevent the supplied power from exceeding a contract demand and minimize problems stemming from the charging of a rechargeable battery.

Abstract: A power supply system includes a current detection unit for detecting a current used by a load and an electric cell. The power supply system further includes a control unit for controlling the electric power stored in the electric cell to be supplied to the load if it is determined that the current detected by the current detection unit exceeds a cutoff threshold.

Abstract: A DC power distribution system is equipped with a storage device having a first storage battery, which discharges to electrical apparatuses only during power failure, and a second storage battery, which discharges to electrical apparatuses when service is not interrupted. The electricity storage device and electrical apparatuses are supplied with DC power from a power generation device which generates electricity using natural energy, and DC power which has been converted from AC power supplied from a commercial power source. When the power supply from the electricity generation device and the commercial power source is interrupted, the first storage battery discharges power to the electrical apparatuses.