Wärtsilä begins construction of 50 MW/100 MWh energy storage system in Belgium

• 2 hours ago (2026-02-17)
• David Flin

Battery 3 Distribution 152 Europe 1158 Storage 51

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Wärtsilä has won a contract from Gramme Storage 1 to supply a 50 MW/100 MWh battery energy storage system (BESS) in eastern Belgium.

The Gramme 1 project will support Belgium’s transition towards a more sustainable, efficient renewable energy system. Construction is underway and the site is scheduled for completion by Q2 2027.

Gramme 1 will use Wärtsilä’s GridSolve Quantum2 energy storage system together with GEMS, its control and optimisation software. Wärtsilä will deliver the project under an engineered equipment delivery contract, with guaranteed asset performance under a separate long-term service agreement.

Gramme 1 is Wärtsilä’s first energy storage project participating in Belgium’s Capacity Remuneration Mechanism (CRM). This framework is designed to ensure Belgium’s energy supply security by enabling assets to deliver essential grid services such as frequency and voltage support that contribute to electricity system resilience and dependability.