The Nature Conservancy (TNC), Sun Tribe and ENGIE will deploy a solar and battery storage portfolio at former coal mine sites in the Appalachians, US.

The first pumped hydro energy storage (PHES) project to be built at a former coal mine in the US will receive up to US$81 million in Department of Energy (DOE) funding.

The German state of North-Rhine Westphalia looks set to go ahead with a 200MW pumped hydro energy storage project in a coal mine, as well as a smaller energy storage demonstration project which includes a flywheel from Stornetic.