A method of operating a fuel cell assembly for an aircraft is provided. The method includes: receiving flight load predictor data for a scheduled flight of the aircraft prior to initiation of the scheduled flight of the aircraft; and reconfiguring the fuel cell assembly in response to the received flight load predictor data prior to the initiation of the scheduled flight of the aircraft, wherein reconfiguring the fuel cell assembly comprises adding or removing a fuel cell module to or from the fuel cell assembly to increase or decrease a power capacity of the fuel cell assembly.