EDF brings €160 million, 600 MWh Navagne BESS online in Belgium

EDF subsidiary Luminus and infrastructure fund I4B have officially commissioned a 150 MW / 600 MWh battery energy storage system in Lixhe, Belgium. Backed by a €160 million capital investment, the Navagne facility directly connects to transmission system operator Elia’s high-voltage network, establishing itself as the largest operational battery asset in the region.

Sited adjacent to the existing Lixhe hydroelectric power plant, the project leverages established generation hubs and preexisting grid infrastructure to bypass interconnection bottlenecks. It reached financial close in June 2025 and was scheduled to be commissioned by October 2026.

Newelec, a Luminus subsidiary, executed the medium-voltage (33 kV) distribution network build-out and retains ongoing supervision of the electrical installations.  Re-Power said on Linkedin that it performed the hot and cold commissioning.

The exact battery energy storage integrator wasn’t announced, but is understood to be a Sungrow model, with 132 storage containers installed. With 600 MWh of capacity, the system’s four-hour dispatch is part of a growing trend across the Benelux region and wider. As shallow but high-value ancillary service markets come closer to saturation, developers are pivoting away from one-hour frequency response systems toward deeper energy shifting, wholesale arbitrage, and capacity provision. 

At €160 million for a 600 MWh system, the project-level capital expenditure lands at roughly €266.7 per kilowatt-hour. 

The project was realized in tandem with I4B, The Belgian Infrastructure Fund and the delivered project is its first completed investment. A video on YouTube shows more of the site.

What they said:

Grégoire Dallemagne, CEO of Luminus, subsidiary of EDF power solutions: “With the inauguration of this 150 MW battery storage facility, the largest in Wallonia, we are taking another important step in the energy transition. This project demonstrates how we can accelerate the development of renewable energies while strengthening grid stability. Flexibility lies at the core of our #Electrify2030 strategy. It allows us to fully embrace our role as an integrator, bridging our generation assets, storage solutions, and customer services to help users consume energy when it makes the most sense.”

Mathieu Bihet, Federal Minister for Energy: “A year ago, I was here to lay the foundation stone for this project. Today, I am pleased to see this ambition has become reality. With 150 MW of power and 600 MWh of storage capacity, this battery storage facility brings new flexibility capacity to our electricity system. This is essential to strengthen the integration of renewable energies, better balance the grid, and ensure the security of our supply. I therefore welcome Luminus’s investment, which concretely contributes to building a more flexible and resilient Belgian energy system.”