IN Brief:
- R.Power, OX2, BRUC, and Aukera have advanced battery projects across Poland, Spain, and Belgium.
- The projects total around 2.2GWh and are targeting commercial operation around 2027.
- Capacity contracts, optimisation agreements, and project finance are increasingly shaping European BESS delivery.
R.Power, OX2, BRUC, and Aukera have advanced four large-scale battery energy storage projects across Poland, Spain, and Belgium, with a combined capacity of around 2.2GWh moving toward construction after financing milestones.
The projects reflect a European grid-scale storage market that is becoming more structured, more capital-intensive, and more closely tied to defined revenue routes. Capacity market contracts, optimisation agreements, project finance packages, and local grid requirements are now shaping how storage assets move from pipeline to delivery.
In Poland, R.Power Renewables has secured financing for its 150MW/300MWh battery energy storage project at Jedwabno. The financing package is valued at PLN270m, or approximately €64m, and is being provided by Siemens Financial Services and Erste Group. Completion is expected by late 2026.
The Jedwabno battery holds a 17-year capacity market contract and will be traded by Axpo under a long-term optimisation arrangement. That structure gives the project a contracted capacity base while allowing market optimisation across balancing, wholesale, and flexibility services.
OX2 has also moved forward in Poland, taking final investment decision on the 165MWp Lion solar farm in the Lubuskie region and a 50MW/120MWh battery system in the Podkarpackie region. The battery is OX2’s first in Poland and holds a 17-year capacity market contract from the 2022 auction for 2027 delivery. NORD/LB and CaixaBank are supporting the long-term project financing package.
In Belgium, Aukera Energy has reached financial close on Project Volt, a 170MW/340MWh battery in La Louvière being developed with Weerts Group. A €97.5m debt facility has been signed, and the project is planned to come online in mid-2027. The asset holds a 15-year contract under Belgium’s Capacity Remuneration Mechanism, secured in November 2025.
As battery systems scale, merchant revenue alone is becoming harder to treat as a sufficient investment base. Ancillary service prices can compress, wholesale spreads can change, and connection costs can alter project economics. Long-term contracts, capacity mechanisms, and optimisation deals provide a more stable foundation, particularly for assets that require larger capital commitments and more complex grid interfaces.
Poland’s storage market is also developing across the supply chain. The opening of CorabES’s Polish storage factory added a manufacturing dimension to the country’s growing battery sector, while capacity market awards and financing packages are creating clearer demand for deployable assets.
The engineering requirements behind these projects are becoming more demanding. Grid-scale batteries require transformer specification, inverter performance management, switchgear, protection coordination, HVAC, fire safety systems, SCADA integration, metering, communications, grid-code compliance, civil works, and commissioning. Project risk increasingly sits in execution as much as development.
The geographical spread of the latest projects also shows how storage models differ across Europe. Poland’s market is shaped by coal displacement, renewable integration, and capacity market participation. Belgium’s storage case is linked to adequacy, flexibility, and limited land availability. Spain’s wider opportunity is tied to solar output, price cannibalisation, and the need for dispatchable clean capacity within a high-renewables system.
A battery in Poland with a capacity market contract, a Belgian project under a CRM, and a Spanish asset exposed to solar-driven price dynamics will be financed, dispatched, and optimised in different ways. The shared direction is clear enough without forcing them into one model: flexibility is moving from ancillary-market opportunity into planned infrastructure.
Further information on R.Power’s renewable and storage activities is available from R.Power.
