More studies show that wind and solar are unreliable sources of energy

Forbes:

Solar panels and wind turbines are making electricity significantly more expensive, a major new study by a team of economists from the University of Chicago finds.

Renewable Portfolio Standards (RPS) "significantly increase average retail electricity prices, with prices increasing by 11% (1.3 cents per kWh) seven years after the policy’s passage into law and 17% (2 cents per kWh) twelve years afterward," the economists write.

The study, which has yet to go through peer-review, was done by Michael Greenstone, Richard McDowell, and Ishan Nath compared states with and without an RPS. It did so using what the economists say is "the most comprehensive state-level dataset ever compiled" which covered 1990 to 2015.

The cost to consumers has been staggeringly high: "All in all, seven years after passage, consumers in the 29 states had paid $125.2 billion more for electricity than they would have in the absence of the policy," they write.
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Solar and wind require that natural gas plants, hydro-electric dams, batteries or some other form of reliable power be ready at a moment’s notice to start churning out electricity when the wind stops blowing and the sun stops shining, I noted.

And unreliability requires solar- and/or wind-heavy places like Germany, California, and Denmark to pay neighboring nations or states to take their solar and wind energy when they are producing too much of it.
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This is consistent with the criticism I have been making about wind and solar energy for some time.  In addition, these sources of energy are also more vulnerable during extreme weather making them a poor choice that could have dire consequences for people impacted by extreme cold or high winds.  The inefficiencies tend to compound the problem.