Tesla announces 240 MW / 480 MWh Megapack site in France

Tesla has announced a new 240 MW / 480 MWh Megapack site at Cernay-lès-Reims, which will soon connect to the French grid and become one of the largest batteries in the country. The project is being developed with TagEnergy and empowers the region with fast, reliable energy storage.

Tesla is responsible for the full engineering, procurement, and construction, so the system arrives ready to run. Once live, Autobidder takes over daily operations. It automatically bids energy into the market, charging when prices drop and discharging when demand spikes. That smart control turns the battery into a profit-making asset while keeping the grid balanced.

240 MW / 480 MWh 2-hour Tesla Megapack system

Energy storage experts know exactly why a 2-hour duration system like this delivers real value. It responds in milliseconds to frequency changes, provides voltage support, and stores extra renewable power that would otherwise go to waste. France, with its growing wind and solar mix, needs this kind of flexibility to avoid curtailment and reduce reliance on fossil-fuel plants.

The entire energy infrastructure brings high uptime and built-in safety features that meet strict global standards. Today’s announcement shows Tesla’s push into utility-scale storage continues at full speed. Similar projects already operate across more than 65 countries, proving the tech scales cleanly and cost-effectively.