ERCOT has seen a ~40% decrease in power generation due to non winterized coal and natural gas power plants. Additionally expected demand was estimated to be much lower.

Starting this thread with a focus on wind energy ? which supplies only 10% of Texas' wintertime power needs ? unfairly casts wind energy as a major driver of Texas' current energy predicament. Also, the author of the Forbes story Crenshaw cites partially recants here:

Many countries with renewable energy production have icy winters. They use commercial cold weather gear to protect those systems and keep them operational. ERCOT and the State of Texas failed to ensure those protections were required or in place, even tho aware of the risk.

This is what happens when you force the grid to rely in part on wind as a power source. When weather conditions get bad as they did this week, intermittent renewable energy like wind isn’t there when you need it.