Germany builds 2.7-MW retractable solar roof for wastewater treatment plant

Stuttgart's water utility is installing the country's largest retractable photovoltaic system, expected to generate 2.2 GWh annually and cover 9% of the treatment plant's electricity needs when completed in 2027.

First covered Nov 2, 2026 · 12:28 AM PT · 1 article · no longer in the live window

Germany builds 2.7-MW retractable solar roof for wastewater treatment plant — Image via pv-magazine.com

Coverage

9d PV Magazine Retractable photovoltaics for wastewater treatment — Germany’s largest retractable solar roof, with a capacity of 2.745 MW, is under construction at a wastewater treatment plant in Stuttgart.

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Appeared in: 2026-11-02 (#6)

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