https://www.americanthinker.com/articles/2021/10/the_real_cost_of_government_mandated_wind_and_solar.html
The government and big financial institutions promote a fraudulent analysis of the cost of solar and wind electricity. Their narrative is that wind and solar are competitive with traditional fossil fuels and that the cost of wind and solar is rapidly dropping. Academics and the media amplify and spread the fraudulent analysis.
The basis of the fraud is a simple comparison of the cost per kilowatt hour at the plant fence for electricity produced by wind or solar versus electricity produced by a traditional plant. Some or all of the massive subsidies for wind and solar are ignored in such comparisons. With such a rigged comparison, wind or solar may seem competitive.
A proper comparison reveals that wind or solar are five or even ten times more expensive than natural gas or coal electricity. To understand why this is so, we have to explain some basic facts that apply to either wind or solar.
Wind or solar is erratic, intermittent electricity. It comes and goes according to the supply of wind and sunlight. Wind is erratic from day to day and usually has a seasonal cycle. Sunlight depends on clouds, seasons and of course does not work at night. The consequence is that wind or solar electricity supply must be 100% backed up by conventional electricity plants. If 100% backup is neglected, rolling blackouts are the result when there is a lull in wind or solar production. The lull can be of short duration or seasonal.
Residential rooftop solar is backed up by the connection to the electric utility. The utility has to spend money on generating plants and a distribution network to maintain backup for the residential rooftop system. When rooftop solar is present, the utility is usually undercompensated for providing the backup service. When cloudiness happens over a wide area the backup plants go into high gear. Cloudiness happens even in sunny southern California.
The cost of backup plants for rooftop solar is borne by all the customers of the utility, not just the rooftop solar users that brag about how cheap their electricity is.
Wind or solar have both economies of scale and penalties of scale. The economy of scale results from the massive expansion of the industry. The equipment is cheaper and more efficient. The penalties of scale are more subtle.