Finland's Lapinlahti Becomes Site of 300 MWh Standalone Storage Project as Covenergo and Delta Capacity Begin Construction

Covenergo and Delta Capacity have moved AKKU One from development into active construction, breaking ground on a 125 MW/300 MWh battery energy storage system in Lapinlahti, Finland. The standalone project, developed through a formal partnership between the two companies, has a full contractor lineup already assembled and a commissioning target set for the fourth quarter of 2027.

How the Project Came Together

The foundation of AKKU One traces back to an acquisition rather than an in-house development. Covenergo purchased the project as a ready-to-build asset from Helios Nordic Energy, a status that allowed both companies to move directly into construction without going through a prolonged permitting and development phase.

Covenergo holds a majority ownership stake in the project and has described its role as drawing on its experience in renewable energy development, project finance, and long-term asset value creation across its European portfolio.

Delta Capacity is serving as EPCM contractor, taking on responsibility for offtake, construction, and long-term asset management in close cooperation with Covenergo's team. The arrangement reflects a structured division of roles, with Covenergo as the majority owner and Delta Capacity managing the execution and operational lifecycle of the asset. František Kalivoda, CEO of Covenergo, framed the transaction and partnership in terms of the company's broader European ambitions.

"This partnership and acquisition is an important step forward for Covenergo's flexible asset portfolio and reinforces our growing footprint in the Nordic energy market," Kalivoda said. "We remain fully committed to delivering high-quality, investment-ready projects that support Europe's energy transition."

Delta Capacity's Expanding Presence Across the Nordic Region

For Delta Capacity, the Lapinlahti development marks its second battery storage project in Finland and arrives shortly after the completion of another Nordic project. The company finished construction of the 70 MW/160 MWh Ånge BESS project in Sweden earlier this year, and AKKU One follows that delivery as Delta Capacity continues to extend its regional footprint. Patrik Hes, CEO of Delta Capacity, pointed to the project as further validation of the company's commitment to the market. "AKKU One once again reaffirms our belief in the Nordic market and our expertise in delivering high-quality battery storage projects, including as a trusted partner for developers like Covenergo," Hes said.

Sungrow Battery Supply Tied to Larger Framework Deal

The battery system for AKKU One will be supplied by Sungrow. The selection is connected to a 1 GWh framework agreement that Delta Capacity signed with Sungrow earlier this year, with the Lapinlahti project drawing on that agreement as one component of a larger planned deployment pipeline. The framework deal indicates the scale at which Delta Capacity intends to deploy Sungrow technology across multiple projects going forward.

Specialist Contractors Assigned Across Key Disciplines

The project has assembled a group of specialist firms to handle distinct technical workstreams. Rejlers, a Nordic engineering consultancy, is providing technical project support across the construction phase. NYAB has been contracted to carry out Balance of Plant works on the site. Grid integration responsibilities have been assigned to Ampner, which is conducting grid connection studies and managing compliance verification for the project.

GreenPowerMonitor, a company operating within the DNV group, will supply the energy management and SCADA systems that will oversee real-time monitoring and control of the facility once it enters operation. The breadth of the contractor base reflects the technical demands involved in delivering a standalone storage project at this scale, where grid connection, civil and electrical infrastructure, and control systems each require dedicated expertise.

What the Project Represents for Finland's Storage Landscape

AKKU One sits within a wider trend of battery storage investment across the Nordic countries, where demand for grid flexibility and balancing services has drawn developers and capital to the region. Finland's position within the Nordic electricity market creates specific conditions favorable to large-scale standalone storage assets capable of providing grid services. At 125 MW of power capacity and 300 MWh of energy capacity, AKKU One is a substantial asset within that market context. Its ready-to-build status at the point of acquisition meant that Covenergo and Delta Capacity could proceed to construction without delays typically associated with earlier development stages.

Nordic Market as a Strategic Priority for Covenergo

Covenergo's participation in AKKU One is consistent with its stated objective of assembling a portfolio of flexible energy assets across Europe. Kalivoda has characterized the Nordic region as a growing area of strategic focus for the company, and the acquisition from Helios Nordic Energy is described by Covenergo as a reinforcement of that regional presence. The company cited its project finance capabilities and experience in long-term asset value creation as core to its partnership role alongside Delta Capacity.