Energy Dome and ENGIE sign pioneering storage offtake agreement
As part of the global transition from research to commercial deployment of cleantech technologies, Energy Dome, a visionary long-duration energy storage (LDES) technology company, and ENGIE a global reference in low-carbon energy and services, have signed an offtake agreement for the first full-scale CO2 Battery developed by Energy Dome in Ottana, Sardinia, Italy.
At the time of commissioning in the first quarter of 2025, the CO2 Battery will be one of the few operational energy storage assets in the global market with a 10-hour discharge duration supported by a commercial offtake agreement. Under the agreement, Energy Dome will own and operate the CO2 Battery facility, while ENGIE will leverage its market expertise to optimize and dispatch the stored energy in the Italian power markets.
The agreement underscores the importance of long-duration energy storage in enhancing grid resilience and reliability, demonstrating the value of the CO2 Battery technology for industry leaders and markets alike. ENGIE’s involvement in the project aligns with its strategy to strengthen its position in energy storage, leveraging flexible and dispatchable solutions such as the CO2 Battery to meet growing renewable energy needs. In Italy ENGIE has been pioneering the dispatching and the optimization of BESS (battery energy storage systems) since 2023; with an existing portfolio of 43 MW/48 MWh, the agreement with Energy Dome will consolidate ENGIE’s know-how in storage optimization.
Energy Dome’s Ottana Project was the first European initiative to receive funding from EU-Catalyst, a program designed to mobilize public and private resources to accelerate the deployment of emerging climate technologies. This funding partnership, supported by Breakthrough Energy Catalyst, the European Commission and the European Investment Bank, was announced at COP28 in Dubai last December. 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.
The partnership represents Energy Dome’s first offtake deal under its “Energy Storage as a Service” model. This commercial arrangement with ENGIE, along with a recent equipment supply contract for a project with Alliant Energy in the US, demonstrates Energy Dome’s market readiness to scale its energy storage solutions at a commercial level, which was made possible also through public support mechanisms dedicated to accelerating emerging clean technologies.
The Ottana project, nearing completion, features a 20MW/200MWh CO2 Battery unit, capable of providing electricity for approximately 14,000 households over a continuous 10-hour period. This design is consistent with the unit deployed for Alliant Energy in Wisconsin, highlighting the scalability of Energy Dome’s technology for future projects.
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