1. Zentrum für Sonnenenergie- und Wasserstoffforschung Baden-Württemberg (ZSW), Lise-Meitner-Straße 24, 89081 Ulm, Germany
2. ElringKlinger AG, Max-Eyth-Straße 2, 72581 Dettingen a.d. Erms, Germany
3. Chair of Electrical Energy Systems (EES), University of Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany
4. Bavarian Center for Battery Technology (BayBatt), Universitätsstr. 30, 95447 Bayreuth, Germany