Train-Pumped Energy For Grid-Scale Power Storage

New advances in batteries and storage technologies for electricity may soon solve one of the most vexing issues with wind and solar energy – dealing with their intermittency. The wind and sun generally do not generate power when it’s needed, and we haven’t had efficient ways to store that energy, instead making other power plants, like hydro and gas, ramp up and down to accommodate.Batteries have been our common method to store electricity, but they have always been small, inefficient and costly. Recent advances have produced large mobile batteries in the MW range but they are still costly, a little unsafe, and require lots of relatively rare chemicals like lithium and gadolinium, the mining of which have their own environmental problems.

Source: Batteries Or Train-Pumped Energy For Grid-Scale Power Storage – Forbes

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