Please, Vince, get educated.

"They recruited the technical expertise of Stanford scientist Mark Jacobson, who happens to be lead author of the same 2015 study on renewable energy that turns out to be fundamentally flawed."

https://cleantechnica.com/2017/07/22/100-clean-renewable-energy-possible-setting-record-straight/
"To counter the misleading statements made by Clack et al., Jacobson created an exhaustive line-by-line rebuttal that was also published by PNAS, along with responses to news articles that came out in the National Review, Forbes, and the New York Times. As detailed in all these rebuttals, there were in fact no modeling errors as claimed by the authors. Of their dozens of misinformed claims, most were dismissed in the press, but one survived to be picked up repeatedly."

Too long to quote, but the last claim is also erroneous.

Not just 100% of electricity from renewables by 2040, but 100% of all energy from renewables by 2050 is possible.