https://www.eia.gov/electricity/gridmonitor/dashboard/electr...
Select generation by energy source.
Note, that while solar will probably do fine as long as its cutting off that peak 3-5PM time-frame, it falls off faster than the wind picks up (in general) and the NG plants then peak.
Move around in the year a bit, then flip to daily average.
See that, those are massive swings. One either overbuilds by a large factor, or one comes up with a storage mechanism to de-carbonize that. I'm betting given the political climate in TX the smart money is assuming that will never happen. So, the smart money would bet on just enough renewables to catch those peaks, and then fill in the rest with NG. Should that fail due to rising costs, there are coal plants.
PS: Texas has 4 reactors seen in that graph, producing ~4.7GW of power, which before the NG gas boom were regularly producing some of the cheapest power in the state. They are also some of the most recently constructed reactors in the US comming online in the early 1990s after 15 year construction cycles filled with lawsuits, and redesigns and every excuse in the book (STP actually had 3 different general contractors IIRC) to keep them from coming online, largely by environmentalists. If the remaining 4 reactors at the two sites and just two more sites with similar generation capacity were created it would more than wipe out the baseload carbon in the state leaving the NG plants only spinning up when the renewables failed. In the grand scheme of texas energy production, it would be a drop in the bucket of plant costs, even if they were constructed at the costs of the existing plants. If they could be constructed at the costs of reactors in the 1960's (aka less than NG plants) those price equations would flip on their heads. No one in their right mind would be building renewable energy sources, but because of politics and people who get in the way of Nuke plants, no one in their right mind will bet against gas.