Google and Energy Dome Launch 23MW/200MWh CO2 Battery Storage Project in Ireland, Targeting 2028 Operation

June 28, 2026

ESG Today USA

Overview

Google and Italian CO₂ battery developer Energy Dome announced plans for a 23MW/200MWh CO2 Battery system in County Offaly, Ireland, to expand Google’s 24/7 clean energy access goal. Scheduled to commence operations in 2028, this commercial energy storage facility utilizes a unique closed-loop cycle of compressing and expanding CO₂ to generate power. This project represents a significant step in deploying long-duration, non-lithium energy storage solutions.

In Depth

Key Findings

Google and the Italian CO₂ battery manufacturer Energy Dome have signed an agreement to deploy a 23MW/200MWh CO2 Battery system in County Offaly, Ireland. This landmark commercial energy storage project will leverage Energy Dome’s proprietary CO2 Battery technology to support Google’s ambitious goal of achieving 24/7 carbon-free energy for its data centers and operations. The facility, projected to be operational by 2028, is expected to play a crucial role in stabilizing Ireland’s power grid and accelerating its decarbonization efforts.

Technical Details

Energy Dome’s CO2 Battery technology operates on a closed-loop thermodynamic cycle using carbon dioxide as the working fluid. During charging, CO2 gas is compressed into a liquid state and stored at ambient temperature. To discharge, the liquid CO2 is vaporized and expanded through a turbine, generating electricity. This system harnesses readily available CO2 in a non-emissive process, making it an environmentally friendly alternative to fossil fuel-based generation while utilizing similar turbomachinery. Key advantages include high efficiency, long operational lifespan, lower capital costs compared to lithium-ion, and inherent safety due to its non-flammable and non-toxic nature. The 200MWh capacity signifies its capability to provide dispatchable power for large-scale industrial loads and communities over extended durations.

Background & Context

Google’s commitment to operating on 24/7 carbon-free energy by 2030 necessitates innovative long-duration energy storage (LDES) solutions to integrate intermittent renewables like wind and solar. Energy Dome’s CO2 Battery is emerging as a promising LDES technology, with the Irish project serving as its commercial-scale demonstration. Ireland, with its abundant wind resources, is actively pursuing renewable energy targets, making robust long-duration storage vital for grid reliability and energy independence. This collaboration aligns with broader industry trends seeking alternatives to conventional fossil fuels and limited-duration battery storage.

Strategic Significance & Outlook

The partnership between Google and Energy Dome is poised to validate the reliability and scalability of CO2 Battery technology, setting a new benchmark in the LDES market. The success of this project could encourage broader adoption of CO2 Battery solutions by corporations and utilities globally, helping them achieve their carbon-free objectives. Energy Dome anticipates accelerating its global market penetration through this strategic alliance with Google. This initiative is expected to drive further advancements in renewable energy integration and the transition to a sustainable power infrastructure worldwide.

Source: https://www.esgtoday.com/google-energy-dome-launch-energy-storage-project-to-enable-24-7-clean-energy-access/

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