Solid-state battery developer ProLogium said it plans to energise the construction site for its Dunkirk gigafactory in early October as infrastructure and grid-connection work advances.
Contractors are working on site access, fencing, platforms and electrical infrastructure at the French development. Grid operator Enedis is carrying out connection work, while Ardelec Energie is installing the electrical infrastructure.
A consortium comprising Sogea Caroni, Exyte and Lucas & Gaillard Architectes is leading the access and platform work. ProLogium said the contractors began operating under a single site framework following a health, safety and environment coordination meeting in early September.
Engineering work and the qualification of local and European suppliers are progressing in parallel with the construction programme. The company is also working on transferring its manufacturing technology to Europe and developing a regional workforce.
The Dunkirk plant will produce ProLogium’s fourth generation lithium ceramic batteries
The Dunkirk plant will include purpose-built cleanroom and dry-room facilities for the production of ProLogium’s fourth-generation lithium ceramic batteries. The company is targeting BREEAM sustainability certification for the building.
ProLogium broke ground on the first phase of the Dunkirk factory in February 2026. It said mass production is scheduled to begin by the end of 2028.
The first stage is designed to provide annual production capacity of 4GWh. ProLogium has allocated space at the site for an eventual capacity of up to 44GWh, although it did not give a timetable for reaching that level.
The factory is intended to combine research and development, intellectual property, cell manufacturing and supply-chain activities in Europe. It will work with ProLogium’s research centre at Paris-Saclay, which opened in 2024.
The company said it is developing partnerships with schools, universities and training centres in the Dunkirk and Hauts-de-France region to prepare workers for the planned manufacturing operation.
ProLogium opened its first gigafactory in Taoyuan, Taiwan, in 2024. The company said it has delivered 2.4 million cells since commercialising its first battery with a fully ceramic separator in 2013.
