Technology group Wärtsilä has been selected by Gramme Storage 1 to deliver a 50 MW / 100MWh battery energy storage system in central-eastern Belgium.
Through the Gramme 1 project, Wärtsilä and Gramme Storage 1 will support Belgium’s transition toward a more sustainable, efficient, renewable energy system.
Construction is now underway and the site is expected to be completed by Q2 2027. The order was booked in Q2 2025.
“This project with Wärtsilä underscores our commitment to dependable, flexible energy in Belgium”, said Guillaume Poncelet, Managing Director at Kallima Energies – the Liège based developer of the project.
“This collaboration highlights the growing role of battery energy storage in supporting Belgium’s electricity system. By delivering essential ancillary services, the system will play a vital role in balancing the grid.”
Gramme 1 represents Wärtsilä’s first energy storage project participating in Belgium’s Capacity Remuneration Mechanism (CRM).
