Well, it's not quite that simple. Intermittency WILL remain an issue. Solar is only good for daytime and not a great intermittency solution. Besides, it tends to be absent when you need it most: on cold winter nights (yes, I know USA dwellers are crazy enough to actually get a peak need in summer days because they are infatuated to air conditioning. I am stipulating that in an energy-scarce world, most of that waste is going to be removed).

So the solutions are not that easy. Some overcapacity with priority uses will surely be part of the solution.

Earth provides enough to satisfy every man's need, but not every man's greed. Gandhi