Wind in Texas has boomed over the last few years. In fact, electricity generation from wind should pass generation from coal in 2020 after coming close in 2019.

For 2019, coal generation will drop to about 80TWh and wind will grow to about 76TWh on the ERCOT grid - so we will have to wait another year for wind to surpass coal.

Solar on the other hand has barely moved the needle in Texas. In fact, ERCOT only decided to break out solar as a separate category in 2016 when it had a 0.24% share of the yearly total in Texas. Over the last couple of years solar has slowly progressed to where it now has about 2GW of capacity in TX and provided about 1.2% of the generation on ERCOT so far this year.

Recently, there has been a dramatic change in the amount of solar projects under development in Texas. A huge number of solar projects have been announced or already under construction. We can expect solar capacity in TX to explode past 10 GW over the next few years. Here are just a few sample of recent projects:

Enel Green Power NA breaks ground on 497-MW Texas solar site

The 225-MW Long Draw Solar Project Breaks Ground in Texas

Orsted Brings 460MW Solar-Plus-Storage Project to Texas Oil Country

...etc

With solar eating away at coal share during the day and wind taking away share in the late afternoon/night - expect to see coal generation continue its rapid decline in the early 2020s.