Alpine Floating Solar Park in Swiss Alps Produces 800,000 kWh, Powers 220 Homes but Misses Target Yield; Expansion Planned Despite Snow and Shading Issues

By: Karmactive Team

Switzerland’s Lac des Toules hosts the world’s first alpine floating solar park—generating 800,000 kWh annually but falling short of initial yield expectations.

Photo Source: Romande Energie (House Of Switzerland)

At a stunning altitude of 1,810 meters, this 2,240-square-meter solar park was designed to produce 50% more power than sea-level systems—but did it meet the mark?

Photo Source: Greater Geneva Bern area (GGBa)

Despite setbacks in its three-year test run, the alpine solar park powers 220 homes and is set for a major expansion, aiming to serve 6,100 homes soon.

Photo Source: Tameer (CC BY-SA 3.0)

Romande Energie invested CHF 2.35 million in this high-altitude project—facing snow and shading challenges that impacted its energy output.

Photo Source: Alana Ballagh (Stimson)

Adaptable design allows the solar panels to float during reservoir-filled months and rest on the lakebed when water levels drop from November to March.

Photo Source: Romande Energie (House Of Switzerland)

With little environmental impact on the drained reservoir, this installation is ideal for alpine conditions,” noted energy researcher Karin Söderström.

Photo Source: Romande Energie (House Of Switzerland)

Cold alpine temperatures and high UV rays were expected to boost efficiency, but snow accumulation created unexpected challenges for the two-sided solar panels.

Photo Source: Romande Energie (House Of Switzerland)

This project bolsters energy independence—and is vital for our valley’s economy,” shared Gilbert Tornare, mayor of Bourg-Saint-Pierre.

Photo Source: Romande Energie (House Of Switzerland)

Honored with the 2021 Watt d'Or award, the floating solar park’s next phase aims to generate 22 million kWh annually, bringing sustainable energy to even more Swiss homes.

Photo Source: Romande Energie (House Of Switzerland)

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