Beyond lithium-ion batteries and pumped hydro, new stationary energy storage even provides faster charge-discharge and 6-month seasonal storage of solar. New gravity, air, hydrogen, thermal, supercapacitor and flywheel stationary storage are compared to emerging forms of battery including for smart cities. Beat mainstream lithium-ion on price and performance. Winners, losers, 20-year roadmaps, forecasts new multi-billion dollar businesses. Gaps in the market. At last, you can understand it all.