China is building out their grid to link areas with high renewable capacity and areas with high demand.
80 percent is usually the point where the need for storage goes from fairly minimal to exponential increases e.g 5 hours storage to 3 weeks in the US according to modelling - https://news.uci.edu/2018/02/27/wind-and-solar-power-could-meet-four-fifths-of-u-s-electricity-demand-study-finds/
China is building out their grid to link areas with high renewable capacity and areas with high demand.
80 percent is usually the point where the need for storage goes from fairly minimal to exponential increases e.g 5 hours storage to 3 weeks in the US according to modelling - https://news.uci.edu/2018/02/27/wind-and-solar-power-could-meet-four-fifths-of-u-s-electricity-demand-study-finds/