Flexibility and added value
Battery Storage (BESS)
Battery storage is key to a more flexible and greener electricity grid. Whether paired with our solar power plants or connected directly to the grid (standalone), our battery systems store energy and release it when the grid needs it most.
Flexibility for the electricity grid
Co-located (solar) or standalone
Utilisation of the energy produced
Battery storage: how does it work?
A battery storage system (or BESS, for Battery Energy Storage System) is an infrastructure connected to the power grid that stores electricity and releases it when needed. Whether co-located with a generation plant or connected as a standalone system, it optimizes the integration of renewable energy and provides essential flexibility services to the grid.
Batteries charge when energy is abundant (high solar production at midday or off-peak hours on the grid) and release it during peak consumption periods, when demand is highest.
Thanks to their responsiveness, batteries help regulate grid frequency. They respond to fluctuations between supply and demand, contributing to maintaining the balance and reliability of the French power system.
By absorbing excess production and smoothing injection into the grid, battery storage enables greater integration of renewable energy without weakening existing infrastructure. It is a key lever to accelerate the energy transition.
Key features of the solution
Responsive, compact and adaptable, battery storage makes the most of every kilowatt-hour fed into the grid.
Smart energy management
Technology
Co-located or standalone deployment
Flexibility
Compact footprint
Land
More renewables on the grid
Impact
The practical benefits of storage
For the electricity grid
Improves the stability and security of supply
Reduces injection constraints caused by intermittency
Provides flexibility for load balancing during peak demand
For the energy transition
Enables the integration of more renewable energy into the energy mix
Helps reduce dependence on fossil fuels
Strengthens regions’ energy independence
For local authorities and landowners
Making the most of small plots of land
Additional income for landowners
An active contribution to local decarbonisation
Our vision: storage at the heart of grid flexibility
We believe that battery storage is a key pillar of a decarbonized power grid. Our strategy is built on two complementary pillars: deploying battery systems across our photovoltaic power plants by leveraging shared grid connections, and developing fully standalone units located near primary substations.
At the beginning of 2026, we commissioned our first battery storage unit in Charente-Maritime, marking the concrete launch of this ambition. This first installation paves the way for systematic deployment across our existing sites throughout France.
And tomorrow? For every new photovoltaic project we develop, we assess the integration of a storage solution from the design phase. By combining solar generation with battery storage, we maximize the value of the renewable energy produced and provide optimal services to the power grid.
Frequently asked questions about battery storage
A BESS (Battery Energy Storage System) is an energy storage system composed of batteries—generally lithium-ion—along with inverters, a transformer station, a delivery substation, and intelligent management software. Its principle is simple: it stores electricity when it is produced in excess (for example, midday for solar) and feeds it back into the grid during peak demand periods or when electricity prices are higher. With a response time in the order of milliseconds, BESS systems also actively contribute to stabilizing grid frequency and voltage. They can be co-located with a photovoltaic or wind power plant, or deployed as standalone systems at strategic points on the grid.
A co-located BESS is installed on the same site as a renewable energy generation facility, such as a solar farm. It shares the existing grid connection and enables shifting solar production injection to periods when electricity demand and value are higher. A standalone BESS, on the other hand, is connected directly to the grid, independently of any generation source. It is positioned at strategic points to provide system services (primary reserve, arbitrage on spot and intraday markets). [New brand] develops both configurations to meet the specific needs of each project and territory.
Solar and wind power are inherently intermittent: they generate electricity based on weather conditions, not demand. Battery storage solves this challenge by making renewable energy dispatchable. According to RTE scenarios, France will need between 9 and 13 GW of battery flexibility by 2050 to support the growth of renewables in the electricity mix. BESS systems help reduce reliance on fossil-fuel thermal plants during peak demand, avoid massive investments in grid reinforcement, and secure electricity supply. They are a key component in achieving the country’s decarbonization targets.
For landowners, hosting a BESS on their property provides an additional source of income through lease payments. Profitability depends on the project’s size, its location on the grid, and the chosen commercialization strategy.
Do you have any other questions?
Contact our teams
Planning a storage project? Let’s discuss it.
Our teams will support you every step of the way, from the feasibility study through to commissioning. Contact us so we can assess the potential of your site together.