Ilmatar has officially commissioned its first large-scale Battery Energy Storage System (BESS), named Ainola, at the Piiparinmäki wind farm in North Ostrobothnia, Finland, with a capacity of 30 MW and storage of 41 MWh.
The system, which began commercial operation on 18 June 2025, is among Finland’s largest storage units directly co-located with a renewable energy asset and is designed to operate for at least 15 years. Ilmatar retains a 10 % stake and oversees optimization, technical and commercial asset management, and electricity trading in day-ahead and intraday markets, with plans to enter reserve/frequency regulation markets pending approval. Majority ownership is held by Nuveen Infrastructure (formerly Glennmont Partners), which took over the wind farm in 2019. This pioneering project enhances grid stability, supports renewable energy integration, and establishes replicable frameworks for future storage developments across Finland and Sweden.
Country updates
-
-
May 05, 2025
Neoen commissioned 55.8 MW Onshore Wind farm in Finland
Neoen SA successfully commissioned its 55.8 MW Lumivaara wind farm in the municipality of Hyrynsalmi, Kainuu region, Finland.
Read more -
April 18, 2025
Letter of Intent signed to transform Koverhar Harbour into a logistics hub for offshore wind energy
Euroports Group and Noatun project companies, jointly held by OX2 and Ålandsbanken Offshore Wind I LP, a fund managed by Ålandsbanken Funds Ltd, have signed a Letter of Intent (LoI) to est...
Read more -
April 07, 2025
PPA signed for 100 MW Solar PV project in Finland
Alight, a leading Nordic solar developer and independent power producer, and Autoliv have signed a power purchase agreement (PPA) to build a 100 MWp solar park in Eurajoki, Finland.
Read more -
March 05, 2025
Commercial production started at a 38 MW Finnish wind farm
Ilmatar has started commercial production at a 38 MW Korpilevonmäki wind farm in Sakyla in southwest Finland. The six wind turbines at the Korpilevonmäki wind farm will produce more th...
Read more -
December 27, 2024
VSB Group commissions 148 MW Karahka wind farm
VSB Finland has commissioned the 148 MW Karahka wind farm located in Oulainen, in the Northern Ostrobothnia region, Finland. Owned by the Finnish utility company Helen and the Bank of Ålan...
Read more
