The Texas Grid: demand and generation on ERCOT
ERCOT runs the grid for about 90% of Texas, electrically isolated from the rest of the country — which makes it a clean natural experiment in what happens when a grid grows fast and re-fuels itself at the same time. Demand is up roughly 29% since 2019, and wind and solar now supply about 39% of generation over a trailing year, up from 21%.
The dashboard shows daily demand laid over the calendar year-by-year, the monthly generation mix by fuel, and the weekly wind + solar share. A companion weekly datapoints page keeps one row per completed week as new data comes in.
Built from the EIA’s Hourly Electric Grid Monitor (Form EIA-930) daily series for the ERCOT balancing authority. The charts are dependency-free inline SVG — no frameworks, no tracking — generated by a small Python pipeline that refreshes the data with one command.