An autonomous distribution board receives feeding of power via a distribution board for a period during which grid power is supplied from a grid power source, while receiving power via an autonomous terminal of a power conversion apparatus for a period during which supplying of grid power from grid power source is stopped. Autonomous distribution board is connected with a specific load and the like. A measurement point switching apparatus is configured to select one from a current sensor configured to monitor a current that flows through a main breaker, and a current sensor configured to monitor a current that is supplied from power conversion apparatus to autonomous distribution board. A fuel battery is configured to adjust an output thereof based on an output of the selected one so that power by fuel battery is consumed by a general load, specific load and the like.