Solar cell or panel on a taxi call box, Munich, Bavaria, Germany

alternative alternative bavaria bavarian box boxes cab call call box call boxes cell cells clean day daylight daytime during electricity energies energy european exterior exteriors generation german germany munchen module modules muenchen munich nobody number numbers oberbayern on or outdoor panel panels photo photos photovoltaic photovoltaics power rank ranks renewable shot shots solar solar source sources southern stand stands supply taxi taxicab telephone the upper