Haapajärvi, 30 June 2025 — NEPower and Alpiq, a leading Swiss electricity producer and energy service provider, have signed an agreement on the construction of a grid connection to the largest battery energy storage system (BESS) to be built in Finland, to date and a related 110/33 kV substation in Haapajärvi.
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The 125 MW battery energy storage system (BESS) in the municipality of Haapajärvi, Finland, is scheduled to be commissioned in 2027. The project was developed by the Finnish company Pohjan Voima. Further acquisitions in battery storage are envisaged.
Swiss power producer and energy services provider Alpiq announced the acquisition of a 125-MW battery storage project in Finland and said it would make more investments in the European energy storage sector. Illustration of a BESS project by Yann Bay Architectes. Image source:
Lausanne - Alpiq is consistently pursuing its growth strategy in the area of flexible systems in order to pave the way for the energy transition and is acquiring its third and largest battery project to date. The 125 MW battery energy storage system (BESS) in the municipality of Haapajärvi, Finland, is scheduled to be commissioned in 2027.
Where is a large-scale battery based in Finland?
The project was developed by the Finnish company Pohjan Voima, a subsidiary of the Swedish group Arise AB. The large-scale battery in Haapajärvi, which is located around 500 kilometres north of Helsinki, is scheduled to go into operation in 2027.