The US Department of Energy (DoE) has finalized a $504.4m loan guarantee to support construction of the country’s largest green hydrogen project in Utah sponsored by Mitsubishi Power Americas and Magnum Development.

The Advanced Clean Energy Storage I project will employ 220MW of wind- and solar-powered alkaline electrolysers to produce 36,500 tonnes of renewable H2 per year.

The complex will store the hydrogen in two natural salt caverns each capable of holding 150 GWh of energy, or 4,500 tonnes, with the facility supplying H2 to the Intermountain Power Agency's IPP Renewed Project -an 840MW natural-gas combined-cycle power plant in southwest Utah capable of burning 30% hydrogen from 2025 (with a view to using 100% H2 by 2045).