Envision Energy has signed EPC (Engineering, Procurement, and Construction) agreement for a 120 MW / 240 MWh lithium iron phosphate (LFP) battery energy storage system (BESS) in Saleux, in France’s Hauts-de-France region. The project, developed for European renewable energy producer Kallista Energy, will deploy Envision’s full suite of DC, AC, and power conversion systems to provide critical frequency regulation services on the French grid through transmission operator RTE’s reserve markets. Marking Envision’s first independent battery storage project in France, the initiative builds on its expanding footprint in Europe and underscores its commitment to supporting grid flexibility and energy transition goals.
Construction is set to begin in June 2025, with Envision Energy also committing to a 14-year long-term service agreement (LTSA), ensuring operational continuity and local engagement well beyond delivery. The project will utilize LFP battery cells supplied by AESC, a Japan-based battery innovator operating a 10 GWh Gigafactory in Douai—also in Hauts-de-France—now in production as of June 2025. This project demonstrates strategic synergy between energy and battery tech leaders while reinforcing the region’s role as a hub for clean energy innovation.
Henry Peng, Senior Vice President and President of Latin America and European Region, Envision Energy, said: “France is a key market for Envision Energy as we expand our presence across Europe, and our partnership with Kallista Energy marks a significant milestone in this journey. We are proud to deliver a fully integrated, turnkey energy storage solution tailored to the Saleux project. Backed by our advanced technology, EPC expertise, and a 14 year long-term service agreement, this project demonstrates our deep commitment to supporting grid stability and accelerating the transition to renewables with safe, reliable, and scalable energy solutions.”
Frédéric Roche, President of Kallista Energy Group, added, “With the Saleux project, Kallista Energy adds another building block to the energy ecosystem needed to facilitate the integration of more renewable energy into the grid while ensuring its reliability. We must move beyond the misconception that electricity cannot be stored, in order to accelerate the deployment of renewables and the shift away from fossil fuels. Our group is working on other projects like Saleux to keep up the momentum.”
