

It took 40 years to have solar energy and batteries up to the task, and we are not there yet. Yes, it could have been a choice to more massively invest in R&D in these fields, but you still need electricity while you shut down nuclear plants. Don’t do it unless you are ready to replace them with something else than coal. We are not there yet. Germany relies on France’s nuclear capabilities to import electricity at night.
I’ll give another factoid:
In a sunny day, around noon, many EU countries have below-zero prices for electricity exports:
It comes with a different set of issues, but this is not prospective or a hypothetical: this is the world we are living in, with the operator of the French grid warning that we are currently at solar saturation.
Now we need the other part of the puzzle: energy storage. On a HUGE scale.