Haapajärvi 125MW/250MWh Battery Energy Storage System
Sector: Energy Storage • Location: Haapajärvi, North Ostrobothnia, Finland
Source: Energy-Storage.News
The Haapajärvi project is Finland's largest battery energy storage system (BESS) with a capacity of 125MW/250MWh and a 2-hour duration. It is designed to operate under challenging Nordic conditions and comply with stringent and evolving grid code requirements. Hitachi Energy is supplying the end-to-end AC power conversion solution, including PCS, transformers, RMUs, power plant controller, and SCA
- Status
- Under Construction
- Sector
- Energy Storage, Power Generation (CCGT)
- Location
- Haapajärvi, North Ostrobothnia, Finland
- Updated
- 22 Jul 2026
- Source
- Energy-Storage.News
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Project Information
Participants
| Not available for this record. |
Status
Original status | under construction |
Taiyo status | Under Construction |
Taiyo last update | 2026-07-22 |
Contact
| Not available for this record. |
Description
Description | The Haapajärvi project is Finland's largest battery energy storage system (BESS) with a capacity of 125MW/250MWh and a 2-hour duration. It is designed to operate under challenging Nordic conditions and comply with stringent and evolving grid code requirements. Hitachi Energy is supplying the end-to-end AC power conversion solution, including PCS, transformers, RMUs, power plant controller, and SCADA-based EMS, while the DC side including batteries is provided by a separate contractor. The project is being built by EPC contractor Nordic Electro Power for energy company Alpiq. |
Original sector | Energy Storage |
Location
Country | Finland |
State | North Ostrobothnia |
City | Haapajärvi |
Source
Source | Energy-Storage.News |
URL |
More Details
Record type | Project |
Sector | Energy Storage, Power Generation (CCGT) |
Article published date | 2025-12-21 |
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