Centrica Energy, Delta Capacity and Covenergo sign a Partial Tolling Agreement for 125 MW / 300 MWh AKKU One BESS Project in Finland

Centrica Energy, Delta Capacity and Covenergo have signed a partial tolling agreement for AKKU One, a 125 MW / 300 MWh standalone battery energy storage system (BESS) being developed in Lapinlahti, Finland.

Under the partial tolling agreement, Centrica Energy will optimise and trade the asset across Nordic power markets, leveraging its 24/7 trading and multi-market optimisation capabilities to unlock value across wholesale, balancing and ancillary service markets. Through the partial tolling structure, the project benefits from secured revenues while maintaining merchant upside.

Commissioning is planned for Q4 2027, and once operational, AKKU One will provide critical flexibility to Finland's power system, supporting frequency regulation, balancing requirements and the continued integration of renewable generation.

This is the second partial tolling agreement between Centrica Energy and Delta Capacity in Finland this month, following the same structure recently agreed for the 125 MW / 300 MWh Karppio BESS project. Together with Centrica Energy's optimisation role on Delta Capacity's 70 MW / 160 MWh Ånge BESS in Sweden the agreement reflects a fast-growing Nordic flexibility partnership between the two companies. This agreement marks a significant milestone for Covenergo’s growing portfolio of flexible assets and strengthens its strategic presence in the Nordic energy market.

“AKKU One is our third battery storage project with Delta Capacity and increases the battery capacity we optimise together across the Nordics to more than 300 MW. As power systems become increasingly shaped by renewable generation, flexible assets such as battery storage play a critical role in balancing supply and demand and creating value from market volatility. This project further strengthens our asset-backed trading business in the Nordics and builds on our growing partnership with both Delta Capacity and Covenergo. We're delighted to continue supporting the development of infrastructure that will help deliver a more flexible and resilient energy system.” said Cassim Mangerah, Managing Director of Centrica Energy.

“We are proud to partner with Centrica Energy and Delta Capacity on AKKU One, a flagship project in our growing BESS portfolio,” said František Kalivoda, CEO of Covenergo. “This agreement is an important milestone for the project and reflects our ability to originate, develop and structure large-scale, bankable energy storage projects. With Centrica’s extensive trading and optimisation expertise, AKKU One is well positioned to maximise its long-term value while contributing to the flexibility of Finland’s energy system.”

"Signing two tolling agreements with Centrica Energy in Finland within a single month shows the pace at which we're scaling our Nordic platform. Centrica Energy brings proven trading expertise and a strong track record in Nordic power markets, and together with Covenergo's ownership and development of AKKU One, this agreement gives the project a clear, well-supported route to market. We're confident this partnership will continue to deliver strong outcomes as our Nordic portfolio grows," said Patrik Hes, CEO of Delta Capacity.

Finland's power system is among the cleanest in Europe and continues to see rapid growth in renewable generation, particularly wind power. As more renewable capacity comes online, battery storage is playing an increasingly important role in maintaining system stability, balancing supply and demand, and enabling more efficient use of renewable energy.