The development of fuel cell electric vehicles (FCEV) poses new challenges for engineers. Disciplines relevant for the development of FCEVs include mechanics (e.g., drivetrain elements), electrics/electronics (e.g., electric motors), software (e.g., fuel cell controls), and chemistry (e.g., chemical processes in fuel cells). A systems engineering approach is essential for such interdisciplinary development work and begins at the vehicle level and promotes interdisciplinary collaboration