[1] Institute ofTechno-economic Systems Analysis (IEK-3), Forschungszentrum Jillich, Germany
[2] Jiilich-Aachen Research Alliance, JARA-Energy, Aachen, Jiilich, Germany
[3] Chair (or Fuel Cells, RWTH Aachen University, c/o Institute o(Techno-economic Systems Analysis (JEK-3), Forschungszentrum, Julich, Germany