Think of battery ingredients and lithium, cadmium and nickel come to mind. Now think again. What about salt, air, bricks, and hand-warmer gel? In our electricity-hungry future they’re set to provide heat to manufacturers who need it, and to help keep the lights on at times when energy is short.
Energy storage has a dual purpose: it plugs gaps when the wind drops or the sun stops shining, and it allows users to buy cheap off-peak power and use it when they need it.
