Under the newly signed agreement, NEPower will now act as the EPC contractor (Engineering, Procurement and Construction) for the entire project. The project includes a 125 MW / 250 MWh BESS (battery energy storage system) and the full delivery of a 110 / 33 kV substation and grid connection in Haapajärvi. This is the largest BESS based on this technology in the Nordics, with commissioning expected for mid-2027. The BESS system will be owned and operated by Alpiq.
Work on the 110 / 33 kV substation and grid connection is already underway, with construction currently being finalized. The EPC delivery will continue seamlessly alongside the grid connection throughout the winter.
Project Manager Riku Kohtamäki commented:
“It was a major achievement for us to deliver the grid connection for this site to a new customer, but the scope of the newly signed agreement is an even bigger milestone – it is by far NEPower’s largest project to date. Thanks to the trust we’ve earned and the flexible collaboration, we are happy to take on the challenges ahead and implement this significant project together with Alpiq’s project team.”
The Haapajärvi energy storage project represents a major step forward for NEPower in achieving its strategic goals and is a strong indication that Finnish expertise is highly trusted across Europe.
“I’m proud of what we’ve achieved as a company so far, and this newly signed agreement is proof of our organization’s ability to deliver ever-larger projects.” – said Mika Alatalo, CEO of Nordic Electro Power Oy.
Published 12.11.2025