Things are getting serious for TagEnergy, a rapidly expanding player in the field of renewable energies and electricity storage. In January 2025, the company will begin the construction of a battery energy storage system (BESS) with a capacity of 240 MW/480 MWh in the Marne department. This project, designed to optimize the use of carbon-free energies, meet demand during consumption peaks and stabilize the network, will be directly connected to the national network thanks to a 225 kV high voltage link.
Tesla as reinforcement
For Christophe Léonard, France manager of TagEnergy, this project is part of a broader transformation: “ The trajectory defined by the Multiannual Energy Plan (PPE) provides for a 2.5-fold increase in wind capacity and a 4-fold increase in solar capacity by 2035. To achieve this, flexibility solutions must be developed. »
Once operational, the system will be capable of storing the equivalent of 20% of the residential electricity needs of Marne, a department with around 565,000 inhabitants.
Tesla, a strategic partner of the project, will not only provide the Megapacks required for energy storage, but also the engineering, procurement and construction (EPC) services. These giant batteries are recognized for their reliability and their ability to react almost instantly to variations in the network.
But that’s not all: Tesla will also bring its Autobidder software platform, used to maximize project value in the electricity market by optimizing bidding and control in real time.
The automaker’s energy division is experiencing a meteoric rise this year. While not long ago, the company reached 480 MWh of deployed capacity in one quarter, it is now achieving this performance with a single project, such as that of Marne. Last quarter, Tesla installed 6.9 GWh of energy storage systems, an increase of 75% from the previous year.
This new project in France is financed by a trio of banking heavyweights, namely ABN AMRO (Netherlands), NORD/LB (Germany) and Caisse d’Épargne CEPAC (France). With an estimated cost of several hundred million euros, the investment promises to quickly pay off given demand.
If the Marne project will become, upon its launch at the end of 2025, the largest BESS in France, it is not the only one in the pipeline. Last July, Harmony Energy announced the construction of two similar 100 MW/200 MWh systems in Oise and near Nantes. To date, the largest operational system remains that of TotalEnergies, with a capacity of 61 MW/61 MWh.
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