Image Credentials: Image Title: Voltalia Breaks Ground on Major Solar and Storage Project in French Guiana Source: (sora.openai) Date: January 2026. Attribution: This image was created using AI-generated imagery (sora.openai) and does not depict a real-world scene.
By Open Chronicle News Desk | January 7, 2026
Voltalia, a leading French renewable energy developer, has begun construction works on a major hybrid solar and battery storage project in French Guiana, marking a significant step forward in the region’s transition to clean energy. The project, with a planned capacity of 43 megawatts of solar power and 135 megawatt hours of battery storage, is being built in the commune of Sainte Anne, in the western part of the French overseas territory in South America.
The site was selected for its strategic location near the Carrefour Margot substation operated by utility EDF, allowing for a direct and efficient connection to the local power grid. Voltalia confirmed that site preparation began at the end of July, ahead of the formal public announcement this week, with full commissioning of the facility expected in 2028.
Once completed, the installation will rank among the largest solar plus storage projects in the region. The integrated battery energy storage system will allow electricity generated during daylight hours to be stored and released when demand is higher or when solar output drops, improving the stability and reliability of the local grid.
In addition to the solar photovoltaic plant and large-scale battery system, the project will include 7 megawatts of biofuel-powered generator capacity. According to Voltalia, this backup system will only be used in extreme emergencies, providing an extra layer of security to support the grid during rare outages or severe disruptions.
The new development builds on Voltalia’s growing footprint in French Guiana. In 2023, the company commissioned a 5 megawatt solar power plant alongside a 10.6 megawatt-hour battery system, expanding an existing renewable energy facility to 19 megawatts of generation capacity and 27 megawatt hours of storage. That earlier project demonstrated the technical and economic viability of hybrid renewable systems in the territory’s challenging tropical environment.
French Guiana, which relies heavily on imported fossil fuels for electricity generation, has been seeking to diversify its energy mix and improve energy security. Large-scale solar and storage projects are seen as a key solution for reducing costs, cutting emissions, and improving resilience in isolated or semi-isolated grids such as those found in overseas territories.
Voltalia said the Sainte Anne project represents a major milestone in its strategy to deploy renewable energy combined with storage in remote and island-like markets. By delivering clean power backed by advanced battery systems and limited biofuel support, the company aims to help EDF and local authorities ensure a stable and sustainable electricity supply for the territory in the years ahead.