The main problem with either wind or solar is that they generate electricity erratically, depending on the wind or sunshine.
Injecting erratic electricity into the grid means that other plants have to seesaw output to balance the ups and downs of wind or solar.
Often, neither wind nor solar is working and at those times a full complement of fossil fuel plants, or sometimes nuclear or hydro plants, must be available.
Viewed from the effect on the economy, adding wind or solar electricity provides the benefit of reduced fuel consumption in backup fossil fuel plants.
How can I claim that wind or solar cost $80 when power purchase agreements at $25 per megawatt hour are often touted in the press? Even at $25 the wind or solar is far from competitive.
Such comparisons are still dubious because there are no unsubsidized, utility-scale wind or solar plants.
A stand-alone, enterprise wind or solar plant would be a huge economic failure because there would be no market for overpriced electricity.
https://www.americanthinker.com/articles/2020/09/the_real_cost_of_wind_and_solar.html
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