Covenergo, Delta Capacity partner on 125 MW BESS in Finland
Construction of the project, AKKU One, in Lapinlahti, Finland is now under way, with commissioning targeted for Q4 2027. AKKU One was acquired as a ready-to-build (RTB) asset from Helios Nordic Energy.
Covenergo, a renewable energy services provider headquartered in the Czech Republic, and Delta Capacity, a Swiss-based developer and operator of utility-scale BESS, are partnering to deliver AKKU One, a standalone 125 MW / 300 MWh BESS project in Lapinlahti, Finland.
Construction of the project is now under way, with commissioning targeted for Q4 2027, according to a media release.
AKKU One was acquired as a ready-to-build (RTB) asset from Helios Nordic Energy. Covenergo, as majority owner, brings experience in renewable energy development, project finance and long-term asset value creation across its European portfolio. Delta Capacity contributes its Nordic execution and battery storage expertise, taking responsibility for securing offtake, construction and long-term asset management as EPCM contractor, in close cooperation with Covenergo’s team.
The project marks Delta Capacity’s second battery storage project in Finland, building on the company’s expanding presence across the Nordic region following the completion of the 70 MW / 160 MWh Ånge BESS in Sweden earlier this year.
“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,” said František Kalivoda, CEO of Covenergo. “We remain fully committed to delivering high-quality, investment-ready projects that support Europe's energy transition.”
“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,” said Patrik Hes, CEO of Delta Capacity. “We’re proud to bring the same speed and execution that delivered Ånge to our new project in Finland.”
A Nordic delivery team is supporting construction and future operations. Rejlers, a Nordic engineering consultancy, is providing technical project support throughout construction. Sungrow will supply the project’s battery system, following the 1 GWh framework agreement signed with Delta Capacity earlier this year.
NYAB is delivering Balance of Plant works, Ampner is carrying out grid connection studies and compliance verification, and GreenPowerMonitor, a DNV company, will provide the energy management and SCADA systems for real-time monitoring and control once AKKU One is operational, the media release said.



