If you could please quote me the current price per kilo of sunshine, or a cubic metre of wind? I didn't say that electricity produced form solar and wind farms is free, only that the input energy is free. Whereas the coal and gas plants have to pay for their fuel. The cost of energy out of a mixed system is the sum total of the fuel costs plus the machinery install, maintenance and disposal costs per unit of energy produced.
So if the input cost of energy is free, the collection is low cost, then all that remains is to have cost effective storage and all of a sudden you've made fossil fuel powered electricity look too dear. Apart from batteries there's hot salt storage and various gravity based systems including pumped storage. Engineers are working on E2G (electricity to gas, mainly hydrogen, some ammonia) tech and E2L (electricity to liquid fuels) tech which will mop up vast amounts of low cost wind and solar power and make it available for storage and transport needs. Once that's viable no-one in their right mind will burn a single gram of fossil fuel ever again.


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