Solbergfoss II

Solbergfoss II is an underground facility located five kilometres below the mouth of the Glomma River at Lake Øyeren in Askim Municipality, Østfold County.

Ownership: 35.6 %
Production: 550 GWh
Power: 100 MW

The development of Solbergfoss II was intended to relieve the old Solbergfoss I power station and to increase capacity during periods of high water flow in the watercourse.

Solbergfoss II is considered a run-of-river power plant. It was commissioned in 1985 and has one generating unit with the same capacity as all 13 units in the older power plant combined.

The generating unit is equipped with a Kaplan turbine and has an installed capacity of 100 MW.

The original Solbergfossen development was a joint project between the City of Oslo and the Norwegian State, and it harnesses five waterfalls starting with Mørkfoss and ending with Solbergfoss. In 1913 it was named the Mørkfoss-Solbergfoss facility.

Solbergfoss II uses a height of fall of 20 metres.

Annual mean production is 550 GWh.

E-CO Energi AS is the operator of Solbergfoss II power plant and responsible for daily operation.