Paris, April 8, 2025 – TagEnergy, a leader in clean energy production behind construction of the largest battery energy storage platform in France, and Banque des Territoires, announce a three-year investment partnership agreement to support the financing of several battery projects in France.

This partnership addresses the investment needed to build critical storage assets to optimise the use of decarbonised electricity, provide critical capacity during peak periods, and improve grid stability. The first project in this partnership is the largest French stationary storage project (240MW / 480MWh) located in Cernay-lès-Reims in the Marne region, in which Banque des Territoires has just acquired 49% of the capital.

TagEnergy is accelerating the deployment of its solar development and storage activities in line with its expansion strategy. The flagship project in Cernay-lès-Reims is a large-scale project to serve the French energy transition and makes it possible to extend flexibility solutions across the country thanks to battery storage. This partnership with the Banque des Territoires enriches TagEnergy’s innovative financing scheme for projects while making their large-scale deployment a reality.

The Banque des Territoires, which is committed to the country’s ecological transformation, is mobilised to support the implementation of the new decarbonised energy mix, and in particular by supporting the deployment of the storage sector. Positioned in this sector since 2021, the Banque des Territoires aims to become more actively involved in this sector. This partnership is consistent with the “flagship” measures of its strategic plan, including support for the implementation of the new carbon-free electricity mix.

This partnership allows Banque des Territoires to position itself alongside TagEnergy in order to meet the need for flexibility to align variable demand with increasingly intermittent production, to free itself from thermal and carbon-based peaking production, and to stabilise the electricity grid. Banque des Territoires will provide 49% of the capital required by the project companies (SPVs) to carry the assets thus developed, with TagEnergy remaining the majority shareholder of its assets.

The first project identified as part of this new partnership is located in Cernay-lès-Reims, in the Marne region. The battery, with a capacity of 240 MW, will have nearly five times the storage capacity of the country’s current largest operational battery. It is scheduled to be connected to the grid by the end of 2025. This project aims to offer a storage capacity of about 20% of the residential electricity needs of the Marne department, which has more than half a million inhabitants.

Franck Woitiez, Chairman and CEO of TagEnergy said: “We are extremely proud to partner with Banque des Territoires, a leading player in financing the energy transition. This strategic partnership is perfectly in line with our common vision of strengthening French energy sovereignty. By working closely together, we will be able to develop innovative storage solutions that are essential for a sustainable and decarbonised energy future. The Banque des Territoires, with its strong commitment to the ecological transformation of the country, provides valuable expertise and support to our projects. Together, we will not only optimise the use of carbon-free electricity, but also provide critical capacity during peak periods and improve grid stability. This partnership marks an important step in our strategy to expand and deploy flexibility solutions at scale across the country.”

François Wohrer, Investment Director at Banque des Territoires, adds: “At Banque des Territoires, we are convinced that the development of renewable energies requires storage. This is why we have decided to position ourselves resolutely in this sector and to significantly accelerate our investments in battery projects. We are delighted to have signed this partnership with TagEnergy, one of the leaders in the sector that has been able to develop what will be the largest stationary storage project in France.”

About TagEnergy

TagEnergy is a clean energy enterprise creating competitive clean power stations to accelerate the energy transition and help the world reach net-zero carbon emissions sooner. Since its formation in 2019, TagEnergy has assembled a portfolio of more than 6GW of solar, wind and battery storage technologies in the UK, Portugal, Spain, France and Australia, of which 1.9GW is under construction or operation.

TagEnergy is controlled by TagHolding SAS, a joint venture between the Impala SAS Group and Exor N.V., supported by major investors Mirova and Omnes, and is operated by a team of entrepreneurs, all shareholders. Its operations span the renewables value chain from development, financing, construction and asset management to commercialisation of its competitive clean energy. www.tag-en.com

About Banque des Territoires

The Banque des Territoires is one of the businesses of the Caisse des Dépôts. It brings together internal expertise for the territories. As a single point of entry for its clients, it works alongside all local authorities, local public companies, social housing organisations, legal professions, companies and financial players. It supports them in the realization of their projects of general interest by offering a continuum of solutions: advice, loans, equity investments, consignments and banking services. By addressing all territories, from rural areas to metropolitan areas, the Banque des Territoires aims to maximise its impact, particularly in the areas of ecological transformation and social and territorial cohesion. The Banque des Territoires’ 37 local offices ensure the deployment of its action throughout mainland France and overseas territories.

Acting together to develop greener and more united territories