1. IEH; University of Stuttgart; Pfaffenwaldring 47 70569 Stuttgart Germany
2. Fraunhofer Institute for Wind Energy and Energy System Technology (IWES); Koenigstor 59 34119 Kassel Germany
3. Austrian Institute of Technology (AIT); Vienna Austria
4. Institute of Industrial Science (IIS); University of Tokyo; Tokyo Japan
5. Central Research Institute of Electric Power Industry (CRIEPI); Tokyo Japan
6. National Renewable Energy Laboratory (NREL); Golden CO USA
7. US Department of Energy; Washington DC USA
8. ENEA-Italian National Agency for New Technologies, Energy and Sustainable Economic Development; Naples Italy
9. 3E sa; Brussels Belgium
10. Centre for Energy and Environmental Markets (CEEM); University of NSW; Sydney Australia