Can't we use wind turbines to spin up a gigantic flywheel and take power from that instead of directly from the wind turbine itself? not sure what the loss would be there... probably too great?,(reply>), They could repurpose a power plant to be a energy storage plant.,(reply>), In such a case, the flywheel need not be in the wind turbine but in a specially made power storage station, and driven by the combined output of multiple windmills. Essentially, you are asking to built an energy storage (and release) facility in the grid. In the absence of the existing types of major power stations, I think that would be a near-necessity. Whether the energy is stored in flywheels or another means would be based on efficiency considerations.,(reply>), Problem with flywheels is that it's a very large space with very little capacity,(reply>), He mentioned fly wheels at the end.