The most powerful battery energy storage system in France

Energy storage / France

Omexom completed for Total Solar International, in collaboration with the company Saft, a turnkey contract with a 25MW/25MWh storage system: the most powerful electrical energy storage system in metropolitan France.  


Connected to the French transmission network RTE (90 kV), the first phase of Dunkirk’s large-scale battery energy storage system (BESS) is now in operation and provides 24/7 services.  

Located on the site of the former TOTAL group oil refinery on the port of Dunkirk (North of France), the system is connected to the extra high voltage electricity transmission network. It will participate in regulating the frequency of the power grid and will support the network during the coldest winter days when it is under voltage and facilitate renewables integration.   

 This major project will help secure the electricity supply, regulate the frequency of the network and reduce intermittent production, which is specific to renewable energies.