Axpo and R.Power sign the largest optimisation BESS deal in Central and Eastern Europe

4.05.2026 - Axpo and R.Power have signed another multi-year contract to optimise operation of a large-scale battery energy storage system (BESS) in Poland. The new 300 MW/1,200 MWh facility will be constructed in Dzięgielewo, Mazovia province, increasing the flexibility of Poland’s power system. The long-term agreement between the companies currently represents the largest deal of its kind for a single project in Central and Eastern Europe, and one of the largest in Europe.

In brief:

• Axpo and R.Power have signed a long-term agreement to optimise a single 300 MW/1,200 MWh BESS facility in Poland, the largest such deal so far in Central and Eastern Europe, and one of the largest in Europe.
• The second BESS agreement between the partners this year strengthens Axpo's position as a technology and trading partner for large-scale energy storage in Poland.
• Project will boost Poland's power system flexibility and integration of expanding renewable energy supply.

Following the January announcement of their joint optimisation of an energy storage project in Jedwabno, northern Poland, Axpo and R.Power, pan-European Independent Power Producer, are extending their long-standing partnership to another, even larger BESS project in Poland. The new agreement covers the full scope of optimisation services for a 300 MW/1,200 MWh storage facility to be built in Dzięgielewo, east-central Poland. It is to date the largest agreement of its kind for the optimisation of a single BESS project in Central and Eastern Europe, and one of the largest on the broader European market.

This agreement will begin at the start of commercial operation and run until the end of 2038. It is based on a profit-sharing mechanism between Axpo and R.Power, combined with a minimum revenue guarantee (floor) that will help to secure the future of Dzięgielewo – one of Poland’s largest planned BESS installations and a key project in R.Power’s 1.7 GW/6.3 GWh Polish energy storage pipeline.

The scale and capacity of the installation is expected to significantly increase the flexibility of Poland’s power system, support integration of the growing renewable energy supply, and provide ancillary services to the balancing market.

Axpo Polska Managing Director Mateusz Marczewski said: “Our partnership with R.Power on the Dzięgielewo project is another step towards building Axpo’s leading position in the large-scale energy storage segment in Poland. Our goal remains to maximise the value of our partners’ assets throughout their entire life cycle – from participation in power and ancillary services markets to a commercialisation model tailored to bankability requirements.”

Axpo Polska Head of Origination Krzysztof Włodyga added: “The trust we have built with R.Power through PPA projects and our recent agreement for Jedwabno enabled us, in a short time, to define a cooperation framework for an asset as large as the Dzięgielewo storage project. A key challenge was scaling solutions to 300 MW and refining them in the context of rapidly evolving operational and regulatory standards.”

R.Power and Axpo in Poland have a long-standing partnership that includes, among other things, long-term power purchase agreements (PPAs) for around 300 MW of photovoltaic capacity and a contract to optimise the Jedwabno storage facility (150 MW/300 MWh). Following the signing of the Dzięgielewo agreement, the total contracted storage capacity with R.Power will reach 450 MW/1,500 MWh.

R.Power Chief Commercial Officer Rafał Hajduk said: “We are expanding our energy storage base to structurally balance our growing PV portfolio and deliver stable, clean energy in Europe. Long-term commercialisation agreements such as this are not only fundamental to delivery of our own pipeline but also lay the groundwork for growth of utility-scale BESS in highly promising markets such as Poland. Our multi-year partnership with Axpo and recent experience on the Jedwabno project enabled rapid and effective alignment on the framework for Dzięgielewo, which will set a new benchmark for energy storage in CEE.”

This latest contract for the Dzięgielewo project strengthens Axpo’s position as a technology and trading partner for large-scale energy storage in Poland. For several years, Axpo has been developing, building and commercially optimising utility-scale storage systems across Europe. Axpo has been active in Poland for 25 years and today is one of the country’s largest independent energy dealers and offtakers of renewable energy, managing a renewable energy portfolio of around 16 TWh and developing photovoltaic, BESS and biogas projects.

Note for editors

• BESS optimisation entails managing the operation of an energy storage asset and related market commitments to maximise revenues and asset value, or, in simple terms, deciding when, how, and for what purpose the battery’s capacity is used. This includes both cycling energy through the battery (charging and discharging) and reserving its capacity to provide ancillary services to the power system operator. Similar to long‑term power purchase agreements for renewable energy installations, the option of guaranteed minimum revenues provided by Axpo supports project bankability and reduces investment risk. Entrusting commercial management and optimisation to a single, trusted partner allows the asset owner to focus on developing the project and maintaining operational performance.