Siikajoki wind project will start commercial operation in 2025 (illustrative image). Credit: Vladimka production /
The wind farm project is being developed by Suomen Hyötytuuli with an investment of $345.44m (Illustrative image). Credit: dmitro2009 /
The wind farm will be powered by 38 Vestas V162-6.2 MW wind turbines (Illustrative image). Credit: Blue Planet Studio /

Siikajoki wind project is a 236MW onshore wind power generation facility being developed in Northern Ostrobothnia, Finland, by renewable energy developer Suomen Hyötytuuli.

Being built with an investment of €330m ($345.44m), the wind farm will be the biggest wind project by Suomen Hyötytuuli. The company made the investment decision for the project in December 2022.

Expected to become operational in 2025, the wind farm will have the capacity to produce 700GWh of clean energy a year.

The company has two other power generation projects under development, which together with the Siikajoki project will increase the company’s annual production to more than 1,900GWh.

The Siikajoki wind project is expected to reduce Finland’s dependence on imported fossil fuels and help prevent climate change.


The Siikajoki wind project will be located on the western side of the municipality of Siikajoki in Northern Ostrobothnia. The project site is located about 50km from Oulu, 5km east of Revonlahti village and 15km west of the town centre of Raahe.

Siikajoki wind farm make-up

The Siikajoki wind project will be installed with 38 Vestas V162-6.2 MW wind turbines, which are designed for sites with low to medium wind speeds and are considered to have extensive application in high average wind speed sites.

The project will also include an electrical substation and wind turbine generators.

Foundations will be installed for the wind turbine generators, and maintenance roads will be built to connect them.

Land-based cables will be installed to transport electricity from the wind turbines to the wind farm’s electrical substation. The project will also include the installation of 110kV overhead cables to provide connection to the power grid.

Of the 38 wind turbines, 34 will be connected to Elenia’s grid, while the remaining four will be part of Fingrid’s grid. Fingrid is Finland’s transmission system operator, while Elenia is an electricity distribution company.

Vestas’ anti-icing system will be used to remove ice formation on the turbine blades during operation to maximise energy output in cold weather conditions. The system uses air heaters to circulate hot air within the blades, which melts the ice and ensures a minimum of 90% retention of energy production.

Turbine details

The 38 V162-6.2 MW wind turbines have a rated power of 6.2MW, cut-in wind speed of 3m/s and cut-out wind speed of 25m/s. The turbines operate at a standard operating temperature ranging between -20°C to +45°C.

Each V162-6.2 MW wind turbine has a rotor diameter of 162m and swept area of 20,612m², the largest rotor size in the Vestas wind turbine family. The turbines will have an electrical frequency of 50/60Hz and be equipped with a gearbox with two planetary stages.

The wind turbines are an improved version of the V150-4.2MW turbines, with a 30% increase in energy production at a standard sound power level of 104.8dB.

Contractors involved

Wind turbine manufacturer and service provider Vestas, headquartered in Denmark, was selected as the wind turbine supplier for the project in December 2022. The company is responsible for the supply, installation and commissioning of 38 V162-6.2 MW wind turbines. The contractual scope also includes the supply and installation of the company’s anti-icing system.

Vestas is expected to commence the supply and installation of the wind turbines in the second quarter (Q2) of 2024, and the commissioning is planned to take place in the second half (H2) of the same year.