Greenvolt Power opens 200 MW battery storage plant in Poland

Portugal-based Greenvolt Power, part of KKR-owned Greenvolt Group, said it has switched on the Turośń Kościelna BESS in Podlaskie Voivodeship, near Białystok, Poland.

The facility has a power rating of 200 MW and a storage capacity of 800 MWh – enough to discharge at full power for around four hours, and connects to the national transmission grid at 110 kV.

From 2028, the project will participate in Poland’s capacity market under a 17-year contract with a capacity obligation of 170 MW, equivalent to 85% of the facility’s power rating, the company said.

The facility uses lithium iron phosphate (LFP) battery technology supplied by BYD Energy Storage, with P&Q serving as general contractor. It comprises 196 containerized battery modules and 49 containerized transformer stations, and can respond to grid operator signals within seconds. Greenvolt said the system has an expected operating life of more than 20 years.

More than 30 electrochemical storage projects secured contracts in the main auction for Poland’s 2028 capacity market delivery year, with a combined capacity obligation of approximately 1.7 GW, according to an industry summary of the auction results.

João Manso Neto, CEO of Greenvolt Group, said battery storage remains one of Greenvolt’s key growth drivers and that the company is developing projects across 13 countries with a 5 GW battery pipeline.

Weronika Nowak, CEO of Greenvolt Power, said the project demonstrates the growing role of utility-scale storage in Poland’s power system and pointed to the Ełk and Siedlce projects as the company’s next major developments.

Greenvolt is finalizing the Ełk project, in Warmińsko-Mazurskie Voivodeship, with the same 200 MW/800 MWh specifications and commercial operation expected in the fourth quarter of 2026.

Combined, the two facilities would provide 400 MW of power and 1.6 GWh of storage. Greenvolt’s Poland pipeline stood at 2,595 MW of battery storage projects as of the end of June, alongside 657 MW of solar PV and 238 MW of wind, the company said.

The inauguration follows last month’s launch of the 99.8 MW/288.6 MWh Buj BESS in Hungary, Greenvolt’s largest operating battery storage facility in that country.

The Turośń Kościelna and Ełk projects trace back to a March 2025 agreement between Greenvolt and BYD Energy Storage to develop up to 1.6 GWh of battery storage capacity in Poland. Turośń Kościelna’s commissioning marks the first of that pipeline to reach commercial operation, with Ełk expected to follow by the end of the year and Siedlce still in development.