A first controller for a first DC/DC converter is configured to generate a first current command value based on a smallest value of an output current when an output voltage of the solar battery is equal to an optimum operating voltage in maximum power point tracking control and an output current for outputting a consumption current between the solar battery and the DC load and a charging current of the power storage apparatus. A second controller for a second DC/DC converter is configured to generate a second current command value such that a voltage of the output terminal is equal to a reference voltage.