US public utility
Appears in 1 story · Last updated Oct 26, 2026
Production underway on the Wisconsin Columbia project (20 MW / 200 MWh) as of October 2026; commercial operation expected in 2027
A white dome the size of seven soccer fields squats over the industrial zone of Ottana, Sardinia, holding 2,000 tonnes of carbon dioxide. It is the business end of the world's first commercial CO2 battery, a 20-megawatt plant that stores 200 megawatt-hours of grid power by compressing the gas into a liquid that is later released through a turbine.
Updated Oct 26
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