Couldn't a fully wind-powered grid use the same "spinning tons of steel" idea ? Like constantly devoting a fraction of the energy production in surplus to keep those turbines running and create grid inertia ?,(reply>), Ah, yes, this was brought up during the video. Those are called "flywheels", and they're used in Stephentown New York, Hazle Pennslyvania, Tehachapi California, and Minto Ontario.They're still mostly experimental at this point, a long-term solution perhaps.,(reply>), @icedragon769 Perhaps I should have been more clear : I'm talking about an independent turbine, not the actual wind turbine itself.,(reply>), Not sure, but I bet the turbines are designed to be as light as possible, precisely to avoid the need to take a long time to gather inertia.