Poland is emerging as the largest utility-scale battery storage growth story in Central Europe. National utility-scale BESS capacity is projected to rise from less than 1 GW to 13 GW by 2030 as renewable energy capacity expands, and the transaction market is moving in step with that forecast.

A 400 MW portfolio changes hands

Greenvolt Group has agreed to sell 400 MW of operational battery energy storage capacity in Poland to A&R Investments, through its subsidiary Greenvolt Power. The deal covers two stand-alone BESS projects in north-eastern Poland: Ełk and Turośń Kościelna, each sized at 200 MW / 800 MWh, for a combined 400 MW / 1.6 GWh. Greenvolt states the transaction ranks among Europe's largest battery storage deals to date by both value and capacity.

Contracted revenue behind the assets

Both projects have secured 17-year capacity market contracts in Poland commencing in 2028, under which each facility receives a fixed payment for making 85% of its rated capacity available to the electricity system. They are also covered by 10-year tolling agreements with Statkraft, under which the batteries will be optimised and their flexibility traded in electricity markets. That combination of a capacity-market floor and merchant optimisation is the template now being replicated across the Polish pipeline.

Still building: Siedlce and a 4.6 GW pipeline

In September 2026 Greenvolt began construction of its 600 MW / 2.4 GWh Siedlce battery storage project, scheduled for commercial operation by end-2027 and expected to be Poland's largest BESS project and one of the largest in Europe when operational. Greenvolt Power's overall BESS pipeline stands at approximately 4.6 GW across its markets, including around 2.4 GW in Poland, with the company planning to sell roughly 70–80% of internally developed projects to recycle capital into new investment opportunities.

"Poland is a strategic market and a key driver of the company's growth in Central Europe." — Weronika Nowak, CEO, Greenvolt

A&R Investments, a Malta-based investment vehicle, is acquiring the two operational Polish facilities. Its director Christian Buhagiar said the projects represent an important addition to its portfolio and an opportunity to invest in large-scale battery storage assets in Poland, citing their scale and their role in providing electricity system flexibility.

Source: Energy Digital

This article was assisted by AI analysis. Please refer to the original source for official information.