One of Finland’s first renewable energy hybrid projects advances – Building permits for wind turbines and battery storage in Sievi now final

Building permits have become legally valid for the 80 MW wind farm and 125 MW battery energy storage system (BESS) developed by Korkia together with its development partner Semecon in the Sievi Malakankangas area. The project has reached ready-to-build status for both the wind power and battery storage, while work on design and building permits for the solar part continues towards final permitting.

When completed, the combined wind and solar PV installation will have a total maximum capacity of approximately 150 MW and is estimated to produce enough energy to supply the annual electricity consumption of up to 60,000 households (assuming 5,000 kWh per household per year). The integrated 125 MW battery storage will help optimize use of the grid connection.

“In the Malakankangas hybrid park, wind and solar production complement each other, and the project is one of the first with a land use plan in legal force in Finland. Permitting the wind turbines to 300 meters enables installation of larger turbines. The site’s proximity to the coast also ensures good logistics during construction. In addition, the nearby main grid connection via Fingrid’s Kukonkylä substation allows an efficient short cable connection to the transmission system,” says Petri Haataja, Vice President, Renewable Energy Portfolio Investments at Korkia.

Earlier in 2025, the Sievi municipal council approved the local land use plan for the Malakakangas wind and solar park. This decision enables construction of eleven wind turbines, about 100 hectares of solar capacity, the battery energy storage facility, and the electrical substation. Building permits for the wind turbines, battery storage, and substation became legally binding in December 2025.

“The permitting process for the Malakakangas hybrid park is now largely complete. This is a major milestone for us. The project will bring more renewable energy to Northern Ostrobothnia and create local opportunities both during construction and for long-term energy production,” says Olli Malkamäki, CEO of Semecon Oy.

14 GW of Korkia’s global renewable energy portfolio in mid or late-phase development

Korkia invests in and develops renewable energy projects internationally in cooperation with local partners. The company’s portfolio comprises over 150 renewable energy projects across eight countries, and by the end of 2025 approximately 14 GW of that portfolio was in mid or late development phase.

Several projects developed by Korkia together with its development partners have recently reached ready-to-build status, including solar power and battery energy storage projects in the United Kingdom, a solar power project in Loviisa, a battery energy storage project in Sievi, as well as solar power and battery storage projects in Italy.

Contact:

Petri Haataja​
Vice President, Renewable Energy Portfolio Investments
+358 40 358 9130​
petri.haataja@korkia.fi