Earlier quoted context omitted.
How exactly will you be 100% renewable during a cloudy and windless period with solar and wind?
Dunkelflaute is 0.5% - 1.5% of the year and most of the events last shorter than 24h https://en.m.wikipedia.org/wiki/Dunkelflaute in my book 98.5% easily fits the bill of "close to 100%" so the answer is exactly what we do today: have a reserve capacity. part of that may even be traditional peaker power plants that remain turned off most of the year just like today. I'd be curious about climate data on the distributi…
So, we'd have to build a large number of peaker plants, which are really expensive in that they have to amortize their costs over a small amount of uptime.