The world uses 60 TWh of electricity daily. About twice that in terms of total energy use. Even just one hour of energy storage is a massive undertaking. Estima

The world uses 60 TWh of electricity daily. About twice that in terms of total energy use. Even just one hour of energy storage is a massive undertaking. Estimates to reach a 100% renewable grid call for 3 weeks of storage: https://pv-magazine-usa.com/2018/03/01/12-hours-energy-storage-80-percent-wind-solar/ https://pv-magazine-usa.com/2018/03/01/12-hours-energy-stora... No solution we have can deliver even remotely close to that amount of storage. Sure, you can build giant flywheels or pulleys or what have you. But can you build them at the required scale? What is the rate at which you can build them? > Sure, you're gonna select the one that you can finance, maintain and find the space for My point is that this is way, way harder than you seem to think.