Energy Dome Launches 20-Megawatt CO2 Battery Storage Facility in Sardinia for Grid Energy Storage
By
rbanffy
Hand-rolled, kettle-boiled, baked to perfection. Worth every minute at the bakery.
Summary
Energy Dome has launched a 20-megawatt CO2 battery energy storage facility in Sardinia that uses 2,000 tonnes of carbon dioxide to store excess renewable energy. The system, which began operating in July 2025, represents a breakthrough in long-duration energy storage technology. The company plans to deploy replicas globally in 2026, with Google investing in the technology to power its data centers with clean energy. The CO2 is sourced from gas suppliers rather than captured from emissions and remains permanently within the closed-loop system.
Key quotes
· 4 pulledThis giant bubble on the island of Sardinia holds 2,000 tonnes of carbon dioxide.
But the gas wasn't captured from factory emissions, nor was it pulled from the air. It came from a gas supplier, and it lives permanently inside the dome's system to serve an eco-friendly purpose: to store large amounts of excess renewable energy until it's needed.
In 2026, replicas of the system will begin popping up on multiple continents.
Google is betting big on CO2 batteries to power its data centers with clean energy.
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