This says 5 hours to get to 99%: https://reneweconomy.com.au/a-near-100-per-cent-renewables-grid-is-well-within-reach-and-with-little-storage/ https://reneweco

This says 5 hours to get to 99%: https://reneweconomy.com.au/a-near-100-per-cent-renewables-grid-is-well-within-reach-and-with-little-storage/ https://reneweconomy.com.au/a-near-100-per-cent-renewables-g... Windgas is actually pretty suitable for that last 1%. It may be 50% efficient to produce but it's easy to store large quantities of gas for long periods for those dark/still spells. Counterintuitively that 1% of electricity generated from windgas will among be the most expensive "green" electricity but it will probably still be cheaper than nuclear power: https://theecologist.org/2016/feb/17/wind-power-windgas-cheaper-and-greener-hinkley-point-c-nuclear-plant https://theecologist.org/2016/feb/17/wind-power-windgas-chea...