I can concede that windmills are very inefficient relative to a nuclear power plant. But relative to a solar farm? There isnt a comparison there. Windmills are able to capture roughly 60% of the energy passing through them while solar panels at best convert 20 - 30% of the energy received. There are individual wind turbines that are generating up to 14 MW. Here's a neat link comparing renewable energy efficiencies you might enjoy.

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https://www.borntoengineer.com/efficient-form-renewable-energy