Google and Energy Dome Launch First Commercial 23 MW / 200 MWh CO2 Battery Storage Plant in Ireland

July 5, 2026

ESG Today, pv magazine Global, gasworld アイルランド

Overview

Google and Energy Dome have finalized a commercial agreement to construct a 23 MW / 200 MWh CO2 battery energy storage plant in Ireland, targeting a 2028 commissioning on a former thermal power plant site. This landmark project marks the first global commercial deployment of Energy Dome’s CO2 battery technology, which utilizes a closed-loop system to store CO2 as a liquid using surplus grid power and then expands it through a turbine to generate electricity for 8 to 24 hours, supporting Google’s 24/7 clean energy goals.

In Depth

Background

As renewable energy sources increasingly integrate into global grids, the demand for long-duration energy storage (LDES) solutions to mitigate their inherent intermittency is rapidly escalating. For major power consumers like data centers, guaranteeing a consistent and clean power supply is paramount. Ireland, despite its proactive stance on renewable energy adoption, grapples with grid stabilization challenges, positioning LDES projects as critical components of its national energy infrastructure. Google, in line with its ambitious goals for reducing corporate carbon footprints and achieving sustainable operations, is strategically investing in innovative storage technologies to meet these demands.

Key Findings

Google and Italian energy storage innovator Energy Dome have finalized a commercial agreement to develop a significant 23 MW / 200 MWh CO2 battery energy storage plant in Ireland. This pioneering project is designed to advance Google’s ambitious target of achieving 24/7 clean energy access across its operations and marks the inaugural commercial deployment of Energy Dome’s CO2 battery technology worldwide.

Technical Details

Energy Dome’s CO2 battery technology offers a distinctive approach to long-duration energy storage. The system harnesses surplus electricity from the grid, particularly from renewable sources, to compress CO2 gas, storing it efficiently in liquid form. When energy demand arises, the stored liquid CO2 is vaporized and expanded through a turbine to generate electricity. This entirely closed-loop process ensures energy storage and release without direct CO2 emissions, minimizing environmental impact. Critically, the system provides an extended discharge duration of 8 to 24 hours, surpassing the typical capabilities of conventional lithium-ion battery systems. Moreover, it circumvents the need for rare metals such as lithium and cobalt, enhancing raw material supply stability and improving cost competitiveness.

Strategic Significance and Outlook

Slated for commissioning in 2028, the Irish project will repurpose the site of a former thermal power plant, contributing to valuable infrastructure reuse and regional economic revitalization. The collaboration between Google and Energy Dome is set to validate the commercial viability of CO2 battery technology, marking a pivotal step towards its accelerated global deployment. The anticipated success of this venture is expected to catalyze adoption among other data center operators and utilities for LDES solutions, especially innovative ones like CO2 batteries. Ultimately, this initiative is poised to intensify competition within the long-duration energy storage market, further advancing renewable energy penetration and the comprehensive decarbonization of power grids worldwide.

Source: https://www.pv-magazine.com/2026/07/01/energy-dome-to-build-23-mw-200-mwh-carbon-battery-in-ireland/

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