Ever tried riding a bicycle up a steep hill and ran out of strength? That’s when an electric bike with a built-in battery might have come in handy and carried you to the top. GE Renewable Energy is now pioneering a similar solution for wind turbines. The batteries store power when there is low demand on the grid, say, on a Sunday or at night. The batteries discharge when the wind stops blowing and people and factories need power. But the battery in question isn’t the solid mass you’d find on a bike, though. It’s millions of gallons of water.
