Energy Dome and SEC Partner to Develop Victoria’s First 10-Hour, 20MW/200MWh CO2 Battery Storage Project

July 19, 2026

Energy Dome (Press Release) Australia

Overview

Italian cleantech firm Energy Dome has partnered with Australia’s State Electricity Commission (SEC) to develop Victoria’s first 10-hour, 20 MW / 200 MWh CO2 Battery plant in the Latrobe Valley. This compressed carbon dioxide battery system aims to bolster grid strength and stability through physical inertia and ancillary services, offers a 30+ year lifespan, and claims significant cost advantages over lithium-ion, without reliance on critical minerals. This marks a pivotal breakthrough for long-duration energy storage in Australia.

In Depth

Key Findings

Energy Dome, an Italian cleantech company, has forged a strategic partnership with Australia’s State Electricity Commission (SEC) to develop Victoria’s inaugural 10-hour, 20 MW / 200 MWh compressed carbon dioxide (CO2) battery plant in the Latrobe Valley. This groundbreaking project is anticipated to play a crucial role in grid stabilization and renewable energy integration, offering a long-duration energy storage solution that is notably independent of critical minerals.

Technical & Project Details

Energy Dome’s CO2 Battery technology stores and releases energy by phase-transforming carbon dioxide between its liquid and gaseous states at ambient temperatures. Specifically, it uses electricity to compress and liquefy CO2, then, when power is needed, the liquid CO2 is expanded to drive a turbine and generate electricity. This system provides physical inertia and grid services that enhance the strength and stability of the electricity network. With a 20 MW power output and 200 MWh storage capacity, this plant will be Victoria’s longest-duration grid battery, offering 10 hours of discharge capability to ensure stable power supply, particularly during evening peaks and periods of low renewable generation. Energy Dome asserts that its CO2 Battery offers significant cost advantages over lithium-ion batteries and boasts a design life exceeding 30 years.

Background & Industry Context

Australia, especially Victoria, is aggressively transitioning away from coal-fired power and accelerating renewable energy adoption, making the need for large-scale, long-duration energy storage solutions an urgent priority. However, conventional lithium-ion batteries may not fully address all long-duration storage requirements due to their specific discharge durations and resource constraints. Non-lithium-based technologies like the CO2 Battery present an attractive alternative, offering advantages in terms of resource abundance, safety, and cost efficiency. The partnership with SEC underscores the Victorian government’s proactive stance in investing in clean energy technologies and leading the energy transition.

Strategic Significance & Outlook

The success of this project could establish a new viable option for the long-duration energy storage market in Australia and globally, particularly disrupting the current high reliance on critical minerals. The deployment of the CO2 Battery will improve grid reliability and support the expanded integration of renewable energy, contributing to Victoria’s ambitious goals of 65% renewable energy by 2030 and 95% by 2035. In the long term, this technology is expected to become a standard long-duration storage solution within renewable energy grids worldwide, fostering a more resilient and diversified energy future.

Source: https://energydome.com/energy-dome-to-deliver-victorias-first-10-hour-battery-in-partnership-with-sec/

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