The 80-page report represents the latest volley in an ongoing skirmish among Western electricity sector stakeholders over what exactly occurred on the regional grid during the Jan. 12-16 deep freeze.

ERCOT CEO Pablo Vegas said the “interesting dynamic” of solar energy helped the Texas grid operator meet record demand during its most recent winter storm.

ERCOT set a new winter peak during a winter blast that pushed temperatures 30 to 50 degrees below normal in Texas.

ERCOT and SPP are dealing with an Arctic blast that's brought subfreezing temperatures to much of the Great Plains and Texas.

NERC issued a warning to the electric industry to expect serious challenges amid expected severe winter weather.