I'm curious how this is solved in Iceland. I've always seen claims that Iceland runs on 100% renewable energy - or is this not a problem that exists for hydropower?,(reply>), @0000000 0000000 And Water Turbines are quite heavy, so they behave more or less like Steam Turbines. The latter still have higher Inertia because they rev much higher; Water Turbines are in the 10s to the 100s (apart from Pelton Turbines perhaps) and Gas/Steam Turbines may even exceed 10,000 RPM.,(reply>), @Hydrogen Bumblebees :D For heating. But electricity comes mostly from hydropower.,(reply>), Don't Iceland use mostly geothermal power? Which won't have the power drop offs because it's heated by earths core,(reply>), hydro as in Dam in pretty much a nuclear station but with water and gravity instead of steam and nuclear fission. In Quebec we are about 90% hydro, 2% fossil (remote areas), 8% new energy (wind &amp; solar mostly) and 0% nuclear and we don't have any of those problems. The hydros station act as an kinetic accumulator just as much as a steam generator.,(reply>), Hydropower as in dams or hydropower as in tidal?