1. Division Photovoltaics Fraunhofer Institute for Solar Energy Systems (ISE) 79110 Freiburg Germany
2. Gallus Ferd. Rüesch AG 9016 St. Gallen Switzerland
3. ASYS Automatisierungssysteme GmbH 89160 Dornstadt Germany
4. Namics Co. Ltd. Kita‐ku, Niigata 950‐3131 Japan