[1] https://blog.gridstatus.io/content/images/2024/08/ERCOT-Reca...
Instead of calling for something that needed more than 5 minutes, ERCOT relied on all the batteries on the grid. I don't know what this quote means:
> 2,000 MW of extra capacity released from ECRS.
But I do know what this means:
> battery discharge peaked 20% higher than the previous record, which was set only the day before.
It's referencing this graph: [2]
[2] https://blog.gridstatus.io/content/images/2024/08/ERCOT-Reca...
The graph has units of Megawatts. In other words, the thing that was record setting about the batteries was not the Megawatt-hours, or total storage in battery systems.
What set the record was the instantaneous power usage, and apparently the batteries in Texas were at their hottest ever. (No idea if anything caught on fire though!)
Here are some more assumptions I am reading into this:
* The 130 MW that didn't come online may have been rotated around. Maybe all the generation jumped in at different times, guided by supply and demand, but ERCOT regulations likely played a role in keeping the existing systems from exceeding the demand or blowing up transmission lines, etc.
* The article says "Solar and Demand Were High Throughout the Day" but I assume that simply means that over time, more and more solar will be installed and more businesses and cities are becoming aware of https://www.ercot.com/services/programs/load (Demand Response). It means they can get cheaper electricity at night for instance, so they run their power-hungry machines when the prices are low.
* Never underestimate the power of Nature. Probably the daytime temps in Texas right now drove the high solar production and high demand. High temps usually mean clear, sunny days and everyone huddling near an air con.