Envision Energy and Kallista Energy Launch 386 MWh Battery Storage Project in France — Envision Energy Co., Ltd.

Event summary

Envision Energy and Kallista Energy began construction on a 193 MW / 386 MWh battery energy storage system (BESS) in Hauts-de-France, France, with commercial operation expected before spring 2028.
The project is powered by Envision AESC's lithium iron phosphate (LFP) cells and supported by the company's 10 GWh gigafactory in Hauts-de-France, operational since June 2025.
Once operational, the system will provide frequency regulation through RTE's reserve markets, supporting France's grid stability and renewable energy integration.
The project builds on Envision Energy's first BESS project in France, Saleux, which broke ground in 2025.

The big picture

This project underscores the growing strategic importance of battery energy storage in Europe's transition to renewable energy. By combining local manufacturing with system integration, Envision Energy is positioning itself as a key player in strengthening grid resilience and supporting sustainable industrial development across the region. The collaboration with Kallista Energy highlights a broader trend of partnerships aimed at accelerating the deployment of scalable storage solutions.

What we're watching

Project Execution: Whether Envision Energy can deliver the Neuilly-en-Thelle project on time and within budget, given its complexity and scale.
Market Expansion: The pace at which similar BESS projects will be deployed across Europe, leveraging the blueprint established by this collaboration.
Regulatory Dynamics: How RTE's reserve markets and other regulatory frameworks will evolve to support larger-scale energy storage integration in France.