Until the "Greens" understand properly about base load, they can fuck off and go live in a tent in a field.
You CANNOT run a grid on renewables. Certainly not regionally. You would if you had a world wide energy grid and everyone plugged into that (good luck standardising all those different electrical standards and voltages btw). You also need some sort of superconductor grid that has minimal transmission losses. Then you could have solar, wind, tidal and geothermal from world sources power the earth grid. But we are talking far fetched Star Trek future.
As much as the greens hate it. Our base load is nuclear and that's the way it SHOULD stay.
Add in more solar, wind and tidal if u can as you remove coal stations.
But you are raving insane if you think you can run a grid without proper base load generation.