> The only thing that’s going to break is the economics of solar.
Yes, that is the exact point. Unless storage capacity is introduced to the system:
1. It becomes uneconomical to add any more solar plants, because the time when the solar plants can produce already has demand fully met by other, existing solar/wind plants.
2. Since you reach peak daily demand when solar and wind approaches 0 output, it means you need just as much fossil fuel plant generation capacity as before - you can't decommission any of those plants (or, at present, perhaps you just convert them to natural gas).
I'm not sure how this thread went off the rails. All I was originally responding to was the sentiment that "you don't need to worry about storage capacity until you already have the vast majority of your energy met by renewables", and that statement is easily provably false because there are many areas of the world that still have relatively low levels of total power generation from renewables, but until the "time shifting" storage problem is solved it will be uneconomical to add more solar to the system.