Solar folding roof at the WWTP Herisau, Canton of Appenzell

With an installed capacity of 345.6 kWp and an annual yield of approx. 293,500 kWh, the solar folding roof over the clarification tanks at the WWTP in Herisau will cover around 25% of the sewage treatment plant's energy requirements from renewable sources. This is now the second solar folding roof in Appenzellerland.

Some facts:

Covered area 2672 m2
Expected annual production 312 MWh

Number of folding roof groups/panels

24
Number of solar modules 960
Construcion period August to October 2023