It looks confusing now because which solutions are best are not yet obvious. But if you look at the growth of renewables generating capacity on the grid, things are already moving faster than people appreciate. There are a lot ways things can shake out - more solar generation and local overnight battery storage - (BTW - an ideal use for that car battery that is no longer giving you 300 mile range but still has lots of cycles left) or maybe the storage stays on the grid, or maybe we get past the politics on nukes and it supplies the night time base load, and of course wind still blows some at night. In any case, all these things are already possible, the but economics of the choices can't shake out until people start trying them out at larger scale.