Well, you miss the point: we do not have much storage because it last way too little at certain daily load. It's simply way to costly so far to have a nation-wide grid full of renewables, while we can make p.v. grow at small scale, for self-consumption reducing the daily load on the grid, when the grid is most charged.
- https://doi.org/10.1109/PowerAfrica.2017.7991192
- https://doi.org/10.1016/j.ijepes.2022.108701
And you'll learn why we can't keep up grids with massive p.v./eolic and why storage is needed.