Not true! Billions of public and private investment have been thrown at these energy sources. Wind turbines are much more efficient; solar cells have dramatically reduced cost and gained huge efficiency.
Problem is that fossil fuel plants need to keep running at the same time as backup power all day and night. Very little solar/wind energy is actually used!
Lousy investment.
I was wrong :)
BUT if it’s become so cheap, why can’t it replace fossil fuel in some areas and why would fossil fuel have to run 24/7 if alternate energy could keep a whole town running?
Allam cycle gas turbine system of 350 MW will have a 2-3 hour start-up from cold. Electrical turn-down is 100% without a drastic loss of efficiency, yet still off loads CO2 produced from hot stand-by operation to a pipeline. Will load follow with a ramp of 3-5% per minute.