The SIG Solar III solar power plant: one of the largest in Switzerland

6,000: this is the impressive number of Solar III photovoltaic panels!

Built near the Verbois Dam, the power plant has been integrated into the site in a way that is environmentally friendly.

Why not come and pay it a visit!


When commissioned in 2005, Solar III was the largest solar power plant in Switzerland. It was installed on a plot of land that was freed up following the renewal of the electrical transformer substation at the Verbois Dam. During its integration into the site, SIG made sure to create special areas for the conservation of the location’s flora and fauna.

Key figures

  • 1 MW de puissance totale

  • 16'000 m2 de surface au sol occupée par les panneaux, soit la surface de deux terrains de football

  • 1 GWh de production par an

  • 300 foyers genevois dont la consommation est couverte par cette production

Due to Covid-19, guided tours are temporarily suspended.


Target audience


These guided tours are suitable for companies, schools, organisations and public bodies.

They are organised for groups from 10 people minimum to 19 maximum. Recommended age: from 10 years old.

Please note: Visits are unsuitable for persons with reduced mobility.


Tour information


From Monday to Friday from 9 a.m. to 4 p.m. (last tour).

Tour combined with the Verbois Dam.

Duration: 1.5 hours

Languages: French, English




Tours are free for schools, organisations and public bodies.

For companies, the price is CHF 300 per guide (19 people).

Registration is required


Registration information


Once you have filled out our form, you will receive a confirmation e-mail.

For more information, contact us via, or at 022 420 85 81.


Read the visiting rules 



Where to find us