Photovoltaic installations can be installed wherever there is sufficient solar radiation. Therefore it is possible to mount a PV array on a lot of different roof surfaces. A PV system works best when facing South and is adjusted to an inclination appropriate for your location. A deviation to South-West/South-East or inclinations between 25° and 60° only slightly reduce the energy yield. Shading by trees or adjacent buildings etc. should, be avoided for best results.