KSBR (Keski-Suomen Betonirakenne Oy) is building a major energy storage facility as part of OX2’s Korkeamaa wind farm in South Ostrobothnia. This follows an agreement reached last year between KSBR and renewable energy company OX2 for the construction of the wind farm itself, located in the municipality of Soini.

The Battery Energy Storage System (BESS) will have a total capacity of 110 megawatts and 220 megawatt-hours of energy storage.

– We are responsible for the design, foundations, civil works, electrical engineering, and grid connection of the energy storage facility. This is a natural extension of the wind farm project we are already executing on-site, explains KSBR Project Manager Tuomas Pukinkorva.

KSBR is also currently building a BESS for Nala Renewables in Kauhava.

– The importance of energy storage technology is growing and developing rapidly alongside the market. While they remain vital for grid balancing, Finland has clearly moved into a phase where systems must also meet future needs, such as increased battery capacity. At KSBR, we recognize this shift and are well-prepared for it, says Jyrki Riekki, director of electrical business.

Work to commence in spring 2026 

KSBR will begin construction of the system this spring, with civil works scheduled for completion by the end of the year. Electrical installations will follow in the winter of 2027, as the battery units arrive on-site.

In addition to Korkeamaa, KSBR’s long-term partner OX2 is building another storage facility at the Kannisto wind farm in Halsua.

– Investing in energy storage is a natural step as we develop our renewable energy production portfolio. By stabilizing the electricity system and markets, the Kannisto and Korkeamaa facilities support the broader expansion of weather-dependent production, says Veli-Pekka Alkula, country manager at OX2 Finland.

Among the largest in the Nordics 

The energy storage facilities represent OX2’s first energy storage additions to its Finnish IPP portfolio. Notably, both are the largest energy storage systems connected to renewable energy projects in the Nordic countries. Construction is scheduled to start immediately, and the storage facilities are expected to be in operation in 2028.

– We are honored to play a role in such a significant renewable energy milestone. We thank OX2 for their continued trust in our expertise, says Janne Kananen, head of KSBR’s Energy and infrastructure division.

Learn more about the wind farm in Korkeamaa

Picture: OX2/Tomas Ärlemo

For further information: Jyrki Riekki, Director of Electrical Business, KSBR, tel. +358 50 334 1276 

Janne Kananen, Head of Energy and Infrastructure, tel. +358 40 631 8181