Electricity system operators and investors could use pumped hydro energy storage to complement the growing deployment of renewable energy. The current grid struggles to push power through when it is being generated in large quantities, and to meet demand when generation is low. Storing energy from wind using pumped hydro means the electricity wouldn’t have to be sold as it is being made, but could be saved for later.
Read more at Pumped hydro energy storage – making better use of wind.