The Società Elettrica Sopracenerina SA (SES) is responsible for the supply of electricity to about 85,000 customers distributed over 38 Ticino municipalities and 5 municipalities in the lower Mesolcina and Calanca valleys.

The energy comes for the most part from the Azienda Elettrica Ticinese and to a small extent from its own production plants (Giumaglio and Ticinetto) and from independent producers; as for the Grisons area, from purchases from the Union of Municipalities for Energy.

The Locarno office houses the management, administrative services, financial services, and technical services for Locarno and the valleys; while the Biasca branch houses the technical services and some commercial services for the northern area.