Alpiq Acquires 100 MW / 200 MWh Cheviré BESS, France’s Largest Operational Battery Storage Asset
Alpiq has acquired the 100 MW / 200 MWh Cheviré battery energy storage system from Harmony Energy at the Port of Nantes Saint-Nazaire. Commissioned in December 2025, the asset is currently the largest operational BESS in France and strengthens Alpiq’s European flexibility portfolio.
Transaction date: · Source: alpiq.com
Key facts
- Transaction date
- Technology
- Battery Storage (BESS)
- Capacity
- 100 MW
- Transaction price
- Not disclosed
- Buyer
- Alpiq
- Seller
- Harmony Energy
- Country
- France
- Region
- Pays de la Loire
- Location
- Port of Nantes Saint-Nazaire (Cheviré), western France
- Continent
- Europe
- Development status
- Operational
- PPA
- n.a.
Technology details
Operational battery energy storage system with an installed power capacity of 100 MW and an energy capacity of 200 MWh (2-hour duration). The facility was inaugurated in December 2025 and is capable of providing system services to the French national grid.
Additional information
Cheviré is currently the largest operational battery storage system in France. The asset is located on the site of a former fossil fuel power plant and can supply electricity equivalent to the consumption of approximately 170,000 households for two hours. The acquisition strengthens Alpiq’s flexible assets strategy and expands its secured BESS portfolio to more than 750 MW across France, Germany and the Nordic countries. Harmony Energy developed and commissioned the project.
Source
Original announcement: https://www.alpiq.com/de/newsroom/medienmitteilungen/alpiq-erwirbt-den-groessten-batteriespeicher-frankreichs