I downloaded the study - it's long and filled with pictures so haven't read yet. I expect they made the mistake of not taking into account the increase in cost

I downloaded the study - it's long and filled with pictures so haven't read yet. I expect they made the mistake of not taking into account the increase in cost due to a primarily renewable grid. Such massive changes in the type of generating supply will yield massive changes in the costs to supply power. As you remove all the dispatchable power sources (power generators that you can put on line at will) you have to build really big heat or electricity storage and would have to have emergency generating capacity for the potential of extremely low wind and sun for days and weeks at a time. Basically, you'd have to have all the natural gas generators and pipelines for the eventuality of bad renewable conditions. Who will pay for that? Just leaving them idle 95% of the time is not the best use of money and it's possible the government may have to pay for renewable's storage problems. Geography is also a serious concern. Texas will have vastly different economics than than Washington or New York.