Power output device with fuel cell and method therefor

摘要

A power output device is disclosed which comprises a fuel cell as one of energy sources. The power output device comprises calculation means for calculating a parameter corresponding to a maximum possible electric power from the fuel cell, and determining means for comparing the calculated parameter with a predetermined value and for determining a state of a power shortage of electric power. The power output device further includes notification means for providing notification of the power shortage when the state of power shortage is determined by the determining means.