GIGA Storage and Tesla have broken ground on the Green Turtle battery energy storage system in Dilsen-Stokkem, Belgium, the developer said in a September 25 update. At 700 MW / 2,800 MWh, Green Turtle ranks among Europe's largest storage projects and cements Belgium's role as a merchant-battery hotspot.
Financials And Sponsors
The project reached financial close in July with a €450 million ($512 million) debt package from a 10-bank consortium — ABN AMRO, Belfius, SMBC, Rabobank, ING, Hamburg Commercial Bank, Santander, ASR and two Triodos entities — alongside equity from Paris-based InfraVia Capital Partners, which acquired GIGA Storage in 2024. Construction kicking off in September was the last milestone before Tesla could begin site works.
Tesla As EPC And OEM
Tesla is playing an unusually broad role: it is delivering its latest Megablock-generation Megapack units and acting as engineering, procurement and construction (EPC) contractor, plus long-term operations and maintenance provider. That vertically integrated scope mirrors the model Tesla is pushing in gigawatt-hour Australian and Californian projects, and lets GIGA Storage lock a single warranty for hardware and civils.
Grid Position
Green Turtle sits at the Rotem industrial estate near the meeting point of Belgium, the Netherlands and Germany, and connects directly to TSO Elia's 380 kV backbone. That location plus Belgium's reduced grid fees for large batteries and its capacity market is what CEO Kevin Dijkers calls "critical infrastructure that strengthens Belgium's security of supply." At peak the plant can supply roughly 385,000 households for a day.
Ranking In Europe
Green Turtle joins a Pan-European wave that includes GIGA Storage's own 300 MW / 1,200 MWh Delfzijl project in the Netherlands, Covenergo and Delta Capacity's 300 MWh Finnish AKKU One BESS and the 950 MW New York bulk solicitation. Green Turtle is scheduled to be energised in 2028.
Reporting based on coverage from Energy-Storage.News, Renewables Now and GIGA Storage.