https://www.ercot.com/gridmktinfo/dashboards/fuelmix

AZ/NM have highly concentrated populations, so I would expect to see only a couple of hexagons over Phoenix and Albuquerque. Texas looking like that is pretty bad, but I suspect this has more to do with the data set.

I would expect Texans to independently go for solar, given the... complications of their power market.

You're looking at the rooftop solar arrays heatmap. Page down for arrays and panels heatmap.