Long-duration energy storage (LDES) technology company Energy Dome and global low-carbon energy firm Engie have agreed to purchase energy from the first commercial-scale CO₂ battery in Sardinia, Italy.
The companies today (19th Dec) announced the signing of an offtake agreement for the facility, which is expected to be commissioned in the first quarter of 2025.
Energy Dome will own and operate the CO2 battery facility, and Engie will optimise and dispatch the stored energy in the Italian power markets. Engie has been managing and optimising battery energy storage systems (BESS) in Italy since 2023, with a portfolio of 43 MW/48 MWh.
Edouard Neviaski, CEO of Engie’s Global Energy Management and Sales business, said the collaboration reflects the company’s commitment to developing sustainable and flexible solutions that support the energy transition.
“By strengthening our expertise in energy storage, we are advancing our mission to provide reliable, low-carbon energy solutions that meet the increasing demand for renewables and support our customers on their decarbonisation journey.”
The Sardinia-based CO2 battery will be one of few energy storage assets on the market with a 10-hour discharge duration supported by a commercial offtake agreement.
It was the first European initiative to receive funding from EU-Catalyst, a programme designed to mobilise public and private resources to accelerate the deployment of emerging climate technologies.
At the recent COP29, global stakeholders highlighted the importance of technologies like long-duration energy storage (LDES) in meeting the Global Energy Storage and Grids Pledge, which aims to achieve 1,500 gigawatts of energy storage capacity worldwide.
Read more: COP29: tackling the energy big five
Claudio Spadacini, CEO of Energy Dome, said, “Our agreement with ENGIE confirms our deployment readiness, validates our business model, and underlines the market-leading value proposition of our technology.”
“The era of deployment has arrived, and this collaboration will undoubtedly accelerate our mission to decarbonise the world by providing sustainable, utility-scale energy storage.”
How it works
The project will use a standard frame 20MW/200MWh CO2 battery, which can supply energy to the grid for ten consecutive hours.
It will be the first of a series of identical units using the same technology design, allowing Energy Dome to reduce costs and accelerate the bankability of future units of the modular, standardised CO2 battery frames.
The CO2 battery does not use materials from rare metals and its main components are based on already existing and known supply chains enabling job creation within Europe.
European CO2 Summit 2025: Rotterdam
The conversation around carbon dioxide (CO2) is changing, with a focus on its value as part of a circular economy. Join The European CO2 Summit in Rotterdam this March to explore the future of the CO2 business in Europe and its alignment with decarbonisation efforts. Expect market insights, emerging technologies, panel discussions, and networking opportunities.
Learn more: https://bit.ly/Europeanco2summit2025-F
