That's a perfectly sensible methodology, do you have a specific problem with it? "Wind and Solar are fine as long as they're only X% of the grid, but you'd nee

That's a perfectly sensible methodology, do you have a specific problem with it? "Wind and Solar are fine as long as they're only X% of the grid, but you'd need <silly amount> of storage for lulls in wind and sun once they get close to 100%" is the question it's answering.