The problem isn't neccessary wind, solar, or even storage of power.
The problem is lack of transmission lines to large population centers, and ironically environmentalists fight tooth and nail any attempt to run new lines with court injunctions, environmental studies, right of way, etc.
Took years in northern MN to run a much needed high voltage line as towns and Indian tribes fought to keep the transmission lines from crossing certain areas.
Most of our current system is outdated and in need of investment, definitely not capable of further demand on the infrastructure.
Don't forget that turbine's and solar use petroleum products and have a limited life, and also have a cost to the environment.
Wind turbines use a fuckload of oil for lubrication.
Both are built with toxic chemicals and heavy metals, and old turbines end up in landfills.
Miles of solar fields replacing farm land between St. Cloud and Mpls.
A complete dead zone for wildlife now, an eyesore, and land no longer available for food production.
Deer, predatory and game birds forced into ever smaller areas.
How efficient are they when covered in snow 4 months out of the year with shorter days and a very low sun angle?