Alpiq acquires 100MW Cheviré battery storage facility in western France
Swiss energy company Alpiq has acquired the Cheviré battery storage facility, a 100MW/200-megawatt-hour (MWh) site in the port of Nantes Saint-Nazaire, France, from Harmony Energy, furthering its focus on battery storage facility acquisitions in France.
Cheviré is currently the largest battery storage facility in France, capable of providing ancillary grid services or meeting the electricity demand of 170,000 households for two hours.
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The transaction was completed on 21 January. Alpiq states that this acquisition reinforces its efforts to integrate increasing renewable power into the energy system.
According to Alpiq, flexible assets such as battery storage and pumped hydropower are essential for balancing variable renewables and stabilising grid frequency.
Cheviré’s 100MW output and 200MWh capacity make it Alpiq’s largest operational battery energy storage system (BESS) asset.
The facility is located on the former Cheviré fossil fuel power plant site, which operated between 1954 and 1986. The BESS uses mainly low-carbon power to deliver grid support or supply electricity.
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By GlobalDataHarmony Energy developed and commissioned Cheviré before selling it to Alpiq. Harmony Energy began operating in the UK in 2010 and launched Harmony Energy France in early 2022.
Alpiq’s BESS portfolio now exceeds 750MW across Germany, France and the Nordics, with nearly half operational or under construction.
Additional projects include a further 100MW BESS in La Corne-en-Vexin, which is currently under construction and will come online in 2027. The company plans further investments in flexible assets across Europe.
Alpiq business division assets head and executive board member Amédée Murisier said: “The acquisition of the Cheviré battery storage facility marks a milestone in the implementation of our growth strategy in the area of flexible plants and for ensuring a sustainable, secure energy supply.
“Flexibility is key to integrating renewable energy and ensuring the stability of electricity grids.
“We are investing specifically in flexible power plants and storage facilities that help strengthen security of supply and deliver sustainable solutions for our customers. France is a strategic market in this regard, and Cheviré represents a milestone on our path to strengthening and further expanding our position as a provider of flexibility solutions in Europe.”
In December 2025, Alpiq entered the German battery storage market with a project pipeline totalling 370MW for BESS in the Brandenburg and Saxony-Anhalt regions.
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