Google, Energy Dome Launch Energy Storage Project to Enable 24/7 Clean Energy Access

Google and energy storage startup Energy Dome announced an agreement to construct a 23 MW/200 MWh energy storage plant in Ireland, marking the first commercial project under the companies’ strategic partnership aimed at scaling Energy Dome’s CO2 Battery technology globally.

The new project will be developed at a former thermal power station near Rhode, Ireland, and forms part of a long-term agreement announced last year to deploy Energy Dome’s CO2 Battery technology at scale and support Google’s ambition to expand access to 24/7 clean, affordable energy globally.

Energy storage is considered a key enabler of the clean energy transition, helping address the intermittent nature of renewable energy sources such as wind and solar while meeting around-the-clock electricity demand and supporting growing power needs from sectors including transportation electrification and AI-driven computing.

Founded in 2019 and based in Milan, Italy, Energy Dome develops long-duration energy storage systems designed to make renewable energy dispatchable. Its CO2 Battery technology uses thermodynamic processes that store energy by compressing CO2 at ambient temperature and release energy by allowing the CO2 to warm, expand, and drive a turbine to generate electricity for the grid when needed. According to the company, its CO2 Battery can provide between 8 and 24 hours of dispatchable electricity, helping address a key challenge in renewable energy integration by enabling longer-duration energy storage than conventional lithium-ion battery systems.

Google parent Alphabet announced a 24/7 CFE ambition in 2020, aiming to run its entire business on carbon-free energy (CFE) by 2030, including matching electricity demand with CFE supply every hour of every day, in every region where the company operates.

The companies said the new facility will absorb excess renewable energy during periods of oversupply and dispatch firm power during periods of system stress, enabling more efficient use of renewable energy resources and improving grid stability.

Energy Dome added that, unlike many battery supply chains that rely on lithium-ion technology and critical minerals, its CO2 Battery uses readily available, off-the-shelf components. The new project is expected to demonstrate how long-duration energy storage can help meet rising electricity demand while strengthening energy security, resilience, and reliability.

Claudio Spadacini, Founder and CEO of Energy Dome, said:

“We are proud to work with Google on a project that strengthens grid resilience and unlocks the path to 24/7 carbon-free energy in Ireland. This project is the first commercial bilateral deployment under the strategic partnership between our companies, which aims to develop CO2 Battery projects across Europe, North America and Asia-Pacific.”

The companies said the project has been awarded a 10-year capacity contract from EirGrid, Ireland’s state-owned transmission system operator, and is expected to come online in 2028. Energy Dome said it plans to develop a second 200 MWh unit at the site, creating a long-duration energy storage hub in the Irish Midlands.

Vanessa Hartley, Head of Google Ireland, said:

“This milestone is a next step in our long-term partnership with Energy Dome, and will help scale their promising long-duration energy storage technology, charging ahead to an affordable, secure and clean energy future.”