The GIGA Green Turtle battery park is a major battery energy storage system (BESS) being developed by GIGA Storage Belgium at the Rotem/Dilsen-Stokkem industrial area in Limburg province, north-western Belgium. The project is designed to provide up to 700 MW of power output and 2,800 MWh of storage capacity. This is equivalent to the annual electricity consumption of about 385,000 households. It is positioned as a flagship facility supporting Belgium and Europe’s energy-transition objectives. This is through enabling excess wind and solar energy to be stored and released during peak demand or low renewable output periods. GIGA Storage also recently launched Amsterdam’s largest battery project with a capacity of 10 MW/47 MWh.
Giga Green Turtle BESS Project Factsheet
Project Name: GIGA Green Turtle Battery Park
Owner: GIGA Storage Belgium
Location: Rotem Industrial Estate, Dilsen-Stokkem, Limburg, Belgium
Power Capacity: 700 MW
Storage Capacity: 2,800 MWh
Engineering Partner: Sweco
Owner’s Engineer: Tractebel ENGIE. Also supports technical delivery.
Permitting Status: Permit obtained in April 2024 for initial capacity of 600 MW/2,400 MWh. Was subsequently upgraded to 700 MW/2,800 MWh.
Target Construction Start: By end of 2025
Target Completion Date: By 2028
Project Timeline for the Giga Green Turtle BESS
December 2023: Permit application submitted for initial 600 MW/2,400 MWh capacity.
April 2024: Irrevocable permit received by GIGA Storage Belgium for the project.
September 2024: Design phase begins under Sweco and Tractebel. Project capacity also scaled up to 700 MW/2,800 MWh.
By end of 2025: Construction of the battery park is scheduled to start.
2028: Targeted completion of the park and entry into operational status.
Giga Green Turtle, One of Europe’s Largest Proposed Battery Storage Project
Reported April 23, 2025 – The 600 MW/2,400 MWh Giga Green Turtle is currently Europe’s largest proposed battery storage project. Developed by Giga Storage, a Netherlands-based energy storage company, the facility will be built on an industrial estate previously home to a zinc factory in Dilsen-Stokkem, Limburg.
The project site is adjacent to a new 380 kV high-voltage station. This is also along the high-voltage line from Van Eyck to Gramme. The station and the high-voltage line are operated by Elia, the Belgian high-voltage transmission system operator. The operator is part of Elia Group, and one of Europe’s top fie transmission system operators.
Additionally, according to reports, there were plans for the development and construction of a battery park at this exact location by another energy company before Giga Storage acquired the land from the zinc factory owners.
Development of the Giga Green Turtle Battery Storage Project
The Dutch energy storage developer announced plans for the development of the Giga Green Turtle and the submission of a permit application back in January 2024. The company revealed that it had obtained irrevocable permit for the development of the 600 MW/2,400 MWh BESS project in April 2024. This milestone according to reports ensures that financing for the project can be arranged.
Construction is expected to start in 2025 with an completion set for 2028. Upon completion, Europe’s largest battery storage facility will feature a total of 20 batteries. Each of these will have an inverter. 185 medium voltage transformers and five high-voltage transformers with a total capacity of 1,500 MVA will also be installed at the site. 25,650 square meters of planting zone will also feature around the new battery park.
According to Giga Storage, the facility will have the capacity to store wind and solar power. This is equivalent to the average energy consumption of 330,000 families per day.
Furthermore, the company said that Europe’s largest proposed battery storage project will play a key role in Belgium and Europe’s energy transition. By developing utility-scale energy storage at strategic locations, according to Ruud Nijs the company’s CEO, energy prices will become more stable. Belgium and Europe at large will thence become less dependent on the fossil energy imports.
Giga Storage’s Contribution to Belgium and Europe’s Clean Energy Transition
The Giga Storage CEO also mentioned that while the Giga Green Turtle will be the largest battery in Europe, much more storage capacity will be needed in the coming years. For that reason, the company said that it aims to deliver 5 GW of BESS projects in the continent by 2030.
In Belgium alone, the company aims for 3 GW of battery energy storage capacity by the end of the decade. In September last year, it set foot on the Belgian market by unveiling plans for a 1,200-MWh battery in the province of Limburg, just across the Dutch border.
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