Launch of Long-Duration Energy Storage Project in Offaly.
Energy Dome and Google Launch Long-Duration Energy Storage Project in Ireland
Energy Dome and Google have announced their first bilateral commercial agreement to deploy a 23 MW / 200 MWh CO2 Battery project in County Offaly, Ireland. The initiative marks a significant milestone in the companies’ long-term partnership, established last year to accelerate the deployment of Energy Dome’s long-duration energy storage technology and support Google’s goal of expanding access to affordable, secure, and around-the-clock clean energy worldwide.
The announcement follows a separate 19 MW / 200 MWh project in Arizona, recently unveiled by Energy Dome, Google, and local utility SRP.
Advancing Long-Duration Energy Storage in Ireland
The Offaly project will be developed, owned, and operated by Energy Dome using its patented CO2 Battery technology. The system stores energy by using electricity from the grid to compress carbon dioxide (CO2). When electricity demand increases, the stored CO2 is expanded through a turbine to generate power that is fed back into the grid.
Ireland has identified long-duration energy storage as a critical component of its energy transition strategy, helping to enhance security of supply, lower system costs, and support the country’s target of achieving 80% renewable electricity generation by 2030.
Through the project, Google and Energy Dome aim to demonstrate how long-duration energy storage can strengthen Ireland’s electricity system by absorbing excess renewable energy during periods of oversupply and delivering reliable power when demand is high. The technology is expected to improve grid flexibility while helping to ease local transmission constraints.
Strategic Location in the Irish Midlands
The facility will be located near Rhode in County Offaly, positioning it at a key node within Ireland’s electricity network. The area is connected by high-voltage transmission infrastructure serving the Greater Dublin region, making it an important location for supporting future energy demand and economic growth.
The project is being developed in partnership with Lumcloon Energy, a Midlands-based renewable energy developer. It will be built on the site of a former peat-fired power station, transforming previously industrial land into a clean energy asset. The surrounding region, including the nearby Rhode Green Energy Park, benefits from significant wind and solar resources that are often curtailed due to grid congestion. By storing surplus energy and releasing it when needed, the project can help maximize the use of renewable generation while reducing pressure on the network.
Supporting Grid Reliability and Energy Security
Unlike many conventional battery technologies that rely on lithium-ion cells and critical minerals, Energy Dome’s CO2 Battery is built using readily available, off-the-shelf components. The company believes this approach can provide a scalable and cost-effective solution for meeting growing electricity demand while enhancing grid reliability, resilience, and energy security.
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.”
Vanessa Hartley, Head of Google Ireland, added:
“At Google, we are committed to catalyzing next-generation energy technologies to bolster grid resilience and introduce critical storage capacity to the system. 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.”
Project Timeline
The County Offaly project has already secured land rights, planning approval, and a grid connection. It has also been awarded a 10-year capacity contract by EirGrid, Ireland’s state-owned transmission system operator. The facility is expected to begin operations in 2028.
Energy Dome also intends to add a second 200 MWh unit at the site, creating a long-duration energy storage hub in the Irish Midlands and further strengthening the region’s role in Ireland’s clean energy future.
About the Companies
Energy Dome develops long-duration energy storage solutions based on its patented CO2 Battery technology, providing dispatchable clean power and capacity services for utilities, energy providers, data centers, and large industrial customers.
Google, a subsidiary of Alphabet Inc., operates products and platforms including Search, Maps, Gmail, Android, Chrome, Google Cloud, YouTube, and Google Play, serving billions of users worldwide while advancing initiatives to support a more sustainable energy future.
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