Covenergo and Delta Capacity Start Building 125MW AKKU One BESS in Finland

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Covenergo and Delta Capacity have begun construction on the AKKU One battery energy storage system project in Lapinlahti, Finland, a stand-alone battery with 125MW of capacity and 300MWh of energy storage. The companies expect to commission the facility in the fourth quarter of 2027. AKKU One was acquired as a ready-to-build asset from Helios Nordic Energy, with Covenergo holding majority ownership and Delta Capacity serving as engineering, procurement and construction management contractor, responsible for offtake agreements, construction delivery and long-term asset management. Rejlers is providing technical project support, Sungrow will supply the battery system under a 1GWh framework agreement signed earlier this year, NYAB is conducting balance of plant works, Ampner is handling grid connection studies and compliance, and GreenPowerMonitor will provide energy management and supervisory control and data acquisition systems. Once operational, the project is expected to deliver flexibility services to the Finnish electricity network, including frequency regulation and balancing, as the country expands its wind and solar generation; for Delta Capacity, AKKU One is its second BESS project in Finland, following the 70MW/160MWh Ånge BESS completed in Sweden earlier this year.

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