Ilmatar has started commercial electricity production at its newly completed wind farm in Ii, Northern Ostrobothnia. The Pahkakoski complex of 30 wind turbines delivers renewable energy to the grid with a nominal capacity of 186 megawatts (MW).
The Pahkakoski wind farm is estimated to produce a total of 600 gigawatt-hours (GWh) of clean, emission-free renewable energy annually. This corresponds to the electricity needs of up to 240,000 apartments or more than 30,000 detached houses. It is a large-scale renewable energy project with significant impacts on the regional economy, the clean energy transition, and Finland's carbon neutrality goals.
A New Way to Build - Ilmatar Driving Industry Development Forward
Construction began at the end of 2023. To optimize progress, Ilmatar applied the so-called TCI contracting model (Transport, Crane and Installation), where special transports, lifting, and installation work are not included in the turbine supplier's delivery as is typical. Pahkakoski is one of the first large-scale projects in Europe built using this model.
The turbines at Pahkakoski are among the tallest in Finland, with a tip height of 245 meters. The park is one of the largest single wind farms ever built in Finland.
Petri Ainonen, Ilmatar's Director of Construction, describes the project as smooth:
"Construction started at the end of 2023. It's been great to see such a large wind farm completed in less than two years. Pahkakoski is a concrete example of Ilmatar's ability to develop and build wind farms even in a challenging market. Both Pahkakoski and Korpilevonmäki, completed earlier this year, were the only wind power investments in Finland in 2023. I'm very pleased with how successfully we implemented the new contracting model and once again pushed the industry forward as pioneers. A big thank you goes to Ilmatar's skilled and committed team and our strong partner network. Shared goals and determination take us far," Ainonen sums up.
Ilmatar Strengthens Its Leading Position - 22% of Finland's Wind Power Growth in 2025
Pahkakoski and Korpilevonmäki together represent the most significant addition to Finland's wind power production in 2025. With these two parks, Ilmatar's wind capacity has grown from 430 MW to 650 MW - an increase of more than 50%. This equals about seven percent of Finland's current wind power capacity.
The 30-turbine Pahkakoski wind farm is Ilmatar's second-largest project. The largest, a 36-turbine park in Alajärvi, South Ostrobothnia, was commissioned in December 2023. Ilmatar now operates 109 turbines commercially.
Currently, Ilmatar has ten wind farms and one solar farm in commercial operation. In total, Ilmatar has more than one gigawatt of renewable production in operation and fully investment-ready. This year, Ilmatar accounts for about 22% of the wind power connected to the grid in Finland, reinforcing its position as a domestic pioneer.
Further information:
Petri Ainonen
Director, Construction
Ilmatar Energy Oy
petri.ainonen@ilmatar.com
About Ilmatar
Ilmatar is a leading Independent Power Producer (IPP) and renewable energy developer in the Nordics. We generate clean electricity sustainably and efficiently from natural sources, wind, and sun. With energy storage, we enhance a more flexible energy ecosystem. Our 24/7 trading and control operations are a crucial part of efficient energy trading and support the profitability of our business.
Our extensive portfolio spans approximately 10 GW in Finland and Sweden, where we develop, own and operate a diverse range of wind and solar energy production facilities and energy storages.
Headquartered in Helsinki, we employ over 60 top experts who enhance the clean transition.
Ilmatar - Changing society. With Nordic renewable energy.
Video link: Pahkakoski Wind Farm (00:59)
