[errantmind]

Some interesting facts:

* ERCOT (Texas) has more renewables generation than every other ISO, including CAISO (California)

* ERCOT is setting new renewables records almost every month, as new renewables sites come online.

Source: https://www.gridstatus.io/home

[racked]

I'm not seeing that at all on gridstatus.io. Although solar capacity is growing, ERCOT mostly and increasingly seems to use natural gas.

[icegreentea2]

ERCOT has way more wind capability (both absolute capacity and percentage) than CAISO. CAISO has more solar as a percentage of capacity, but even then the absolute capacities for solar between CAISO and ERCOT are actually quite similar.

For example, on April 22 at local noon, CAISO was generating 72% of its total capacity from solar with 18GW. ERCOT was generating 63% from solar+wind roughly split 50/50. Solar was at 30% at 13GW.

You're right that ERCOT uses a lot of natural gas (and infact today, April 28th looks to be anomalously high), but it definitely has very very meaningful amounts of renewable generation.