POWER SUPPLY SYSTEM AND METHOD OF POWER SUPPLY

A power supply system of the embodiment includes a fuel cell which is able to generate power, a power storage device which stores the power generated by the fuel cell, a converter which converts power from the fuel cell or the power storage device and switches between supply of power from the fuel cell to an auxiliary device and supply of power from the power storage device to the auxiliary device, and a controller which controls at least the switching of the converter.