Note - if you replace a 100 MW coal plant with a 100 MW Solar Farm - you get power from 10am to 4pm.
To replace a 100 MW coal plant with solar, requires 1800MW hours of electricity storage and 4 100 MW Solar Farms.
100MW Coal = 4 100 MW Solar Farms + 1800MWH batteries.
Then, you hope it doesn’t rain or snow.
“Then, you hope it doesn’t rain or snow.”
Or HAIL!!!