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Planning factors

Smooth operation of an integrated PV system optimised for yield hinges substantially on the following three planning factors:
  • Orientation South-facing surfaces with an approx. 35° inclination from horizontal generate the highest yields
  • Ventilation The electricity yield of the PV system decreases the more the modules heat up. The decrease in output is less with thin-film modules than with crystalline.
  • Shading The solar energy yield decreases in partial shading, for example due to neighbouring buildings or vegetation.

Figure 1: Shading caused by neighbouring buildings

Source: solarbüro 2009

Last page update: 08.02.2011