Record on the Polish energy market. Statkraft and Greenvolt Power sign the largest BESS agreement in the European Union.

Statkraft and Greenvolt Power have entered into a 10-year contract covering the optimisation of two utility-scale energy storage facilities in Poland. The agreement covers the Ełk and Turośń Kościelna installations, with a combined power capacity of 400 MW and an energy storage capacity of 1,600 MWh (1.6 GWh). According to both parties, this is the largest publicly announced transaction of its kind in the European Union and marks Statkraft’s official entry into Poland’s utility-scale battery storage market.

Division of roles in the project

The transaction has been structured under a so-called agreement model. Under this arrangement, Statkraft obtains the exclusive right to manage the charging and discharging cycles of the storage facilities across energy markets and flexibility services, using its advanced market optimisation tools.

In return, Greenvolt Power gains a stable, long-term and predictable revenue stream. This complements the revenues already secured through Poland’s capacity market, with capacity contracts for the Turośń Kościelna facility set to take effect from 2028. Financing for the construction of the facilities themselves had already been secured by Greenvolt through a EUR 153 million bridge loan and a EUR 65 million guarantee provided by UniCredit. We previously reported on this in our article.

Technical parameters and project implementation status

Both projects are based on 4-hour energy storage technology supplied by BYD Energy Storage, using BYD MC-Cube T units. The Turośń Kościelna facility in Podlaskie Voivodeship has a power capacity of 200 MW and an energy storage capacity of 800 MWh and was officially inaugurated in July 2026. The Ełk facility, located in Nowa Wieś Ełcka, offers the same specifications — 200 MW and 800 MWh — and is currently in the final stage before commercial operation begins.