"It doesn’t always rain when you need water, so we have reservoirs - but we don’t have the same system for electricity,” says Jill Cainey, director of the UK’s"

"It doesn’t always rain when you need water, so we have reservoirs - but we don’t have the same system for electricity,” says Jill Cainey, director of the UK’s" Actually... we do. It is called pumped hydroelectric storage [1], and it is essentially just a reservoir, a pump, and a turbine. [1] http://energystorage.org/energy-storage/technologies/pumped-hydroelectric-storage http://energystorage.org/energy-storage/technologies/pumped-...