Jenni Energietechnik AG

Jenni Energietechnik is regarded as a pioneer of seasonal heat storage in Switzerland. The company manufactures the Swiss Solartank in Oberburg and supplies storage tanks ranging from single-house size up to systems for entire neighborhoods. In April 2025, three large storage tanks were delivered to the Schaffhausen Ost energy community.

For private homeowners, Jenni offers solar thermal systems for hot water and heating support through local installation partners. The lineup ranges from a simple combi system all the way to a fully solar-heated home. Branch offices exist in St. Gallen and Ticino.