| energypedia | www.energypedia.info |
| Bundesverband Solarwirtschaft (BSW) | www.solarwirtschaft.de |
| Alliance for Rural Electrification | www.ruralelec.org |
| Green Solar Academy | www.solar-training.org |
| KW Neun | www.kw-neun.de |
| Afrikaverein der deutschen Wirtschaft | www.afrikaverein.de |
| Landesverband Gross- und Außenhandel | www.lgad.de |
| Photon International Magazine | www.photon-magazine.com |
| Sun and Wind Energy | www.sunwindenergy.com |
| Photovoltaik: Das Magazin für Profis | www.photovoltaik.eu |
| University of Hohenheim | www.uni-hohenheim.de |
| Amnesty International | www.amnesty.org |
| PV Magazine | www.pv-magazine.de |
| Solar Cooling Engineering | www.solar-cooling-engineering.com |
| Self Chill | www.selfchill.org |
