Solar Energy, Battery Storage Projects For Estonia
(Image courtesy of Connecto)
Sunly, in collaboration with Metsagrupp, is developing a 16 MW / 32 MWh battery energy storage system (BESS) next to the 45 MW Raba Solar Park in Pärnu County, Estonia.
The total project cost is US$7.6 million. The project will be built without subsidies. Construction is set to begin this summer, with completion expected in early 2026.
The construction permit for the Raba Battery Park was obtained in January, and work will commence in the coming months. The 16 MW battery can store 32 MWh of electricity over two hours, ensuring that solar energy can be used even when the sun is not shining.
“Beyond solar and wind energy production, we see energy storage playing an increasingly critical role that requires strategic investment. Storage solutions help stabilize the grid, reduce price fluctuations, and make renewable energy more accessible to consumers,” said Klaus Pilar, Sunly’s country manager in Estonia.
Sunly is actively developing hybrid parks across the Baltics and Poland, integrating solar, wind, and storage solutions. According to Sunly, this hybrid approach increases efficiency, accelerates grid connection timelines, and shortens the development and construction cycle, making hybrid parks more competitive than single-technology renewable projects.
Storage also enables the use of low-cost wind and solar energy even when production is not occurring, helping to smooth out price peaks. Additionally, it reduces the carbon footprint of Estonia’s electricity grid, as stored renewable energy can be used instead of activating fossil fuel-based reserve power plants.
The Raba Storage Project is part of Sunly’s broader strategy to add 1000 MWh of battery storage capacity to the Baltic grid by the end of 2026, contributing to grid stability and renewable energy optimization. While short-term storage plays a vital role in balancing daily electricity demand, long-term storage solutions are needed to address increasing renewable energy production. For example, Energiasalv could serve as a regional energy reserve for windless and cloudy days.
