Construction of a large photovoltaic system on several rooftops, 16000 square metres, Gelsenkirchen, North Rhine-Westphalia, Germany, Europe

16000 alternative alternative building buildings business clean conscious construction day daylight daytime during eco eco friendly ecofriendly economy electricity energies energy engineering environment environmentally europe european exterior exteriors federal flat flat roof flat roofed flat roofs flatroof flatroofs frg friendly gelsenkirchen generation german germany green industry large lot lots many metres module modules nobody north numerous of on outdoor panel panels photo photos photovoltaic photovoltaics power renewable republic rhine rhine westphalia roof roofed roofs rooftops several shot shots solar source sources square supply system technic technical technology the westphalia