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Environment

Giant dome filled with CO2 could store excess power from renewables

Italian firm Energy Dome is building a "CO2 battery" in Sardinia that will store excess power from renewables and release it back to the grid when needed

By Madeleine Cuff

10 July 2024

An illustration of Energy Dome’s “CO2 battery” plant

EnergyDome

A giant dome filled with 1000 tonnes of carbon dioxide could be the answer to a growing headache for the electricity sector.

Huge growth in wind and solar energy has provided a source of plentiful green power, but during sunny, windy days across Europe, there is often more electricity than the grid needs.

Grid operators and renewable plant owners are racing to find a cheap way to store this excess power so it can be used when energy demand…

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