Trollheim power plant is located in Surnadal Municipality, Møre og Romsdal County.

Ownership: 100 %
Production: 805 GWh
Power: 130 MW

Inflow from the tributaries of the Surna River is collected in the Folldalen Valley into two artificial reservoirs; Gråsjø and Follsjøen.

Trollheim power plant uses a height of fall of 402 metres from Follsjøen, which is regulated between 420 and 375 metres above sea level. After being used in production in the power plant, water is discharged into the Surna River.

The power station has an installed capacity of 130 MW and is equipped with a Francis turbine.

The power plant was commissioned in 1968.