... tend to have the most expensive electricity.
That's because you still need to build and maintain backup power systems to cover the demand for power when the wind isn't blowing and the sun isn't shining.
Here in California our "backup power" is natural gas. When the sun is shining brightly these filthy natural gas power plants are not making any money but we still have to pay for them.
You can watch how this works in real time here:
https://www.caiso.com/todays-outlook/supply
At the moment 81% of the electricity I'm using is "renewable," mostly solar. As the sun goes down California will switch to natural gas.
In Denmark and Germany, countries with aggressive renewable energy programs they pay even more for electricity than we do here.
Hybrid natural gas / wind / solar / battery power grids will not reduce the total amount of greenhouse gasses humans dump into the atmosphere before our civilization collapses; they will not "save the world."
Like it or not, the only energy resource capable of displacing fossil fuels entirely, which we must do, is nuclear power.