Harmony Energy, has announced its plans to construct France's largest battery energy storage system (BESS) at the Cheviré site, utilizing Tesla Megapack technology. This project, a significant milestone for the French energy sector, will be the country's first large-scale 2-hour battery system.

The Cheviré battery project, located in Nantes Saint-Nazaire Harbour on the former site of the Cheviré power station, will feature a 100 MW / 200 MWh renewable energy infrastructure. This site, which previously operated on coal, gas, and oil from 1954 to 1986, will now harness cutting-edge Tesla Megapack and Autobidder technology. Once operational, the system will generate enough electricity to power approximately 170,000 homes for two hours, exceeding the population of Nantes.

Andy Symonds, Harmony Energy's CEO for France, expressed enthusiasm for the project: “Developing and operating vital battery energy storage facilities across France will lead to enhanced energy security, more affordable energy bills, and the decarbonisation of the grid. We are excited to commence building works on our first project.”

In addition, Clément Girard, Harmony Energy's COO for France, highlighted the historical significance of the location: “It’s an exciting location given the historical importance of the fossil-fuel coal power station, but looking ahead, the delivery of the Cheviré BESS will transform the site into exactly the opposite, facilitating the green electrification of the French energy system, whilst offsetting several hundred thousand tons of CO2.”

Harmony Energy has previously developed and energized Europe's three largest BESS projects by MWh, all using Tesla Megapack and Autobidder technology. These projects are designed not only to enhance energy security and support local communities but also to protect nature, setting new standards with biodiversity initiatives and community funds.

The Cheviré project will play a critical role in balancing the French electricity grid network, allowing for a greater reliance on renewable energy and a reduction in fossil fuel dependency.