The Viinamaki Wind Farm – Battery Energy Storage System is a 5,600kW energy storage project located in Ii, Northern Ostrobothnia, Finland. The rated storage capacity of the project is 6,600kWh.

The electro-chemical battery energy storage project uses lithium-ion as its storage technology. The project was announced in 2019 and will be commissioned in 2021.


The Viinamaki Wind Farm – Battery Energy Storage System is being developed by Tuuliwatti. The project is owned by Tuuliwatti (100%).

The key applications of the project are frequency regulation, renewable energy integaration and backup and black start capabilities.

Contractors involved

Tuuliwatti is the owner. Tuuliwatti is the developer. Saft Groupe is the technology provider for the project.

Additional information

The project is among the first of its size to combine the very rapid load-following features of wind farms and batteries to support the management of the power network, enabling the power output to be adjusted in the blink of an eye. The battery will be the size of six containers with a capacity of 6 MW.


All publicly-announced energy storage projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects are sourced through secondary information sources such as country specific power players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.