Fuel cell vehicle and method using fuel cell vehicle

A method using a fuel cell vehicle,

• the fuel cell vehicle comprising:
• a fuel cell;
• a hydrogen tank configured to supply hydrogen to the fuel cell;
• a driving motor driven with electric power generated by the fuel cell;
• and
• a power feeder configured to supply the electric power generated by the fuel cell to an external load, wherein
• the fuel cell vehicle is operated in either one of a drive mode that supplies electric power to the driving motor and a power feed mode that supplies electric power to the power feeder,
• the method comprising:
• obtaining current location information with regard to a current location of the fuel cell vehicle, supply position information with regard to a supply position where the fuel cell vehicle receives a supply of hydrogen, a fuel consumption of the fuel cell vehicle in the drive mode, a remaining amount of hydrogen stored in the hydrogen tank, and a consumed amount of hydrogen per unit time in the power feed mode,
• using the current location information and the supply position information to calculate a required amount of hydrogen that is required for the fuel cell vehicle to drive from the current location to the supply position in the drive mode,
• using the required amount of hydrogen, the remaining amount of hydrogen, and the consumed amount of hydrogen per unit time in the power feed mode to calculate a power feedable period that denotes a time period when the fuel cell vehicle is operable in the power feed mode without causing the remaining amount of hydrogen to become less than the required amount of hydrogen, and
• displaying information with regard to the power feedable period.