Energy Dome has announced a global commercial partnership with Google to deploy its long-duration CO₂ Battery technology in support of Google’s goal of operating on 24/7 carbon-free energy by 2030. As part of the agreement, Google has also made a strategic investment in the Italian energy storage company.
The partnership aims to accelerate the deployment of Energy Dome’s technology across Europe, the Americas and the Asia-Pacific region. A pipeline of projects has already been identified, with several sites currently in the development and contracting stages.
Energy Dome’s CO₂ Battery is designed to store renewable electricity and deliver power continuously for 8 to 24 hours, helping overcome the intermittency of solar and wind generation. Unlike lithium-ion batteries, the system relies on a patented thermomechanical process using carbon dioxide and is built from commercially available components, avoiding supply chain constraints associated with critical minerals and rare earth elements.
The technology also contributes to grid stability by providing mechanical inertia through rotating equipment, helping compensate for the decline in system inertia as conventional fossil-fuel power plants are retired.
Google said the agreement marks its first commercial deployment of long-duration energy storage technology and forms part of a broader strategy to secure reliable, clean electricity for its growing operations, including data centres supporting artificial intelligence.
“Energy Dome’s proven and scalable long-duration energy storage solution can help us unlock rapid progress,” said Maud Texier, Director of EMEA Energy at Google. She added that wider deployment of the technology could improve access to reliable and affordable electricity while supporting greater integration of renewable energy.
Energy Dome founder and CEO Claudio Spadacini described the agreement as an important milestone in demonstrating that continuous carbon-free electricity can be achieved through commercially viable long-duration storage technologies.
Google’s investment comes as Energy Dome enters a commercial growth phase. The company already has contracted projects with Alliant Energy in the United States, Engie in Italy and NTPC in India, reflecting increasing global interest in long-duration energy storage as power systems integrate larger shares of renewable generation.
