World's Largest Retractable Solar Roof Launched in Switzerland
A retractable solar roof at the ARA Thunersee plant in Switzerland spans 20,000 m² and provides 3 MWp capacity. This innovation optimizes land use by integrating solar energy generation with existing industrial structures, addressing space constraints in energy infrastructure.

Engineers in Switzerland have introduced the world's largest retractable solar roof at the ARA Thunersee wastewater treatment plant, covering 20,000 square meters with a capacity of 3 megawatts peak (MWp). Developed by dhp Technology, the system utilizes an 'origami-style' design that allows for automatic retraction during adverse weather, enhancing operational efficiency.
This project exemplifies the potential for solar energy to be integrated into existing facilities without requiring additional land, making it particularly relevant for regions with land-use pressures. The innovation suggests a shift towards multifunctional energy systems, encouraging energy planners to consider adaptable solutions in the transition to cleaner energy. Such developments could reshape the deployment of large-scale solar projects in industrial areas worldwide.




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