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 400 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.

Cassim Mangerah
Managing Director, Centrica Energy

We are proud to partner with Centrica Energy and Delta Capacity on AKKU One, a flagship project in our growing BESS portfolio. 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.

František Kalivoda
CEO, Covenergo

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.

Patrik Hes
CEO, 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.

 

About Centrica Energy
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. 

 

Centrica Energy is a global energy trading company which helps move energy from source to use powering businesses, homes, and societies. Across 8 offices on three continents, and with 800+ passionate and highly skilled energy experts, they trade power, gas, liquified natural gas and green certificates, 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. 

 

About Covenergo

Covenergo is a trusted renewable energy services company with a proven track record across Europe and beyond. The company provides expertise across 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. Covenergo partners with private, institutional and public-sector investors to structure and deliver bankable, investment-ready energy projects. For more information, please visit www.covenergo.com.

 

About Delta Capacity

Founded in 2022, Swiss-based Delta Capacity is driven by its vision to develop, acquire, own, and operate utility-scale battery storage across Europe. The company is scaling quickly while maintaining a consistent focus on asset quality — prioritising designs that support high availability, efficient performance, and strong operating outcomes. The rapidly growing team brings decades of 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 assets by 2030.