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.

The Agreement Covers the Finnish Standalone BESS Project

Under the agreement, Centrica Energy will optimize and trade the asset across Nordic power markets, leveraging its 24/7 trading and multi-market optimization 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 flexibility to Finland's power system, supporting frequency regulation, balancing requirements, and the continued integration of renewable generation.

Second Finnish Tolling Deal between Centrica and Delta Capacity

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 growing Nordic flexibility partnership between the two companies. The agreement also marks a milestone for Covenergo's growing portfolio of flexible assets and strengthens its strategic presence in the Nordic energy market.

Cassim Mangerah, Managing Director at Centrica Energy, said the project is the company's third battery storage project with Delta Capacity and increases the battery capacity the two companies optimize together across the Nordics to more than 400 MW.

He noted that 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, adding that the project strengthens Centrica Energy's asset-backed trading business in the Nordics and builds on the growing partnership with both Delta Capacity and Covenergo.

František Kalivoda, CEO of Covenergo, described AKKU One as a flagship project in the company's growing BESS portfolio and said the agreement reflects Covenergo's ability to originate, develop and structure large-scale, bankable energy storage projects.

He added that with Centrica's trading and optimisation expertise, AKKU One is positioned to maximise its long-term value while contributing to the flexibility of Finland's energy system.

Patrik Hes, CEO of Delta Capacity, said that signing two tolling agreements with Centrica Energy in Finland within a single month shows the pace at which the company is scaling its Nordic platform.

He highlighted Centrica Energy's trading expertise and track record in Nordic power markets, and Covenergo's ownership and development of AKKU One, saying the agreement gives the project a clear, well-supported route to market.

Battery Storage in Finland's Renewable-Heavy Power System

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.

About the Companies Involved

Centrica Energy is the energy trading and optimisation arm of Centrica plc, responsible for managing commodity risk and sourcing energy on behalf of Centrica Group's energy supply activities. It is a global energy trading company trading power, gas, liquefied natural gas and green certificates across eight offices on three continents, with more than 800 energy experts connecting energy producers, suppliers, and offtakers in wholesale energy markets.

Centrica Energy is one of the largest renewable asset managers in Europe, with over 18.8 GW of capacity under contract, of which more than 85% is renewable assets.

Covenergo is a renewable energy services company with a track record across Europe and beyond, providing expertise in renewable energy development, BESS and hybrid systems, project finance, EPCM and construction management, as well as strategic partnerships and M&A.

Operating across six countries, Czechia, Greece, Cyprus, Romania and Finland, Covenergo has a team of 55 professionals and currently manages more than 180 MWh of BESS and 72 MWp of PV under construction. The company partners with private, institutional and public-sector investors to structure and deliver bankable, investment-ready energy projects.

Founded in 2022, Swiss-based Delta Capacity develops, acquires, owns and operates utility-scale battery storage across Europe. The company prioritises designs that support high availability, efficient performance and strong operating outcomes, and its team brings experience across large-scale infrastructure, renewable energy, energy trading and software development.

Delta Capacity currently has nearly 1,000 MWh under construction and targets the build-out, commissioning and operation of more than 6 GWh of flexible storage capacity.

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