by Jeff St. John
October 01, 2015

The value of energy storage, supporters say, lies in its diversity. It can act like supply or demand, an unusual characteristic in the generation- vs.-consumption schema of the modern power grid. It can provide flexible capacity for utilities, reliability for critical facilities, dispatchability for intermittent wind and solar power, fast-responding power and energy for grid markets, or steady support for overstressed substations and grid circuits, depending on the need.

Sometimes it can do more than one of these things at once, or several...