Texas is one of the best climates in the US for renewables but in locations with less sun and wind the math will be different. That math includes batteries for load shifting of which Texas is installing a lot.

As renewable generation increases past a certain level grid stability does require additional effort and that’s a lot more difficult to price in. In Texas their grid is isolated from the rest of the US. This may create a lower ceiling on renewables since they can’t send excess generation anywhere other than their own batteries .