Electricity production is in Finland based on versatility and decentralisation using different production methods. The primary energy sources used to produce electricity include nuclear power, hydropower, coal, natural gas, wood fuels, peat, oil, and wind.
Wind power electricity was produced in Olkiluoto in 2004–2017 by a 1 MW power plant. The plant was built for a practical study into wind conditions and production opportunities of wind power in the power plant area. The wind power plant was dismantled in the autumn of 2018. The structures and the generator of the plant were severely damaged to beyond repair. The equipment from the dismantled wind power plant was delivered to West Coast Training Ltd WinNova, the Emergency Services Training Centre of Western Finland and Prizztech Oy for use for training purposes.
Up until 2020, TVO also owned a 45% share of the coal-fired power plant in Meri-Pori. The Meri-Pori 565 MW coal-fired power plant is located in Tahkoluoto area of Pori and owned and operated by Fortum Power and Heat Oy.
There is a 100 MW gas turbine reserve power plant in Olkiluoto, constructed jointly by Fingrid Oyj and TVO.