1. Holst Centre; P.O. Box 8550 5605 KN Eindhoven The Netherlands
2. TNO Science and Industry; P.O. Box 6235 5605 HE Eindhoven The Netherlands
3. Fraunhofer Institute for Solar Energy Systems ISE; Heidenhofstrasse 2 79110 Freiburg Germany
4. Energy Research Centre of the Netherlands (ECN); P.O. Box 1 1755 ZG Petten The Netherlands
5. Department of Energy Conversion and Storage; Technical University of Denmark; Frederiksborgvej 399 4000 Roskilde Denmark