What ERCOT is
The Electric Reliability Council of Texas — ERCOT — is a nonprofit that manages the electric grid for most of the state. It's a grid operator, not a utility. It doesn't generate electricity. It doesn't own transmission lines. It doesn't sell you power. What it does is match supply and demand on the grid in real time so that the lights stay on.
If you live in a deregulated part of Texas (the whole state except El Paso, a chunk of East Texas, and parts of the Panhandle), your electricity passes through ERCOT's dispatch system.
Why ERCOT is different from other grid operators
Most of the US is connected to one of two giant interconnected grids — the Eastern Interconnection or the Western Interconnection. Texas is mostly on its own: the ERCOT Interconnection. This started as a way to avoid federal regulation (an interstate grid falls under FERC; Texas stays in-state so it falls under the Texas PUC). The tradeoff is that when ERCOT runs short on power, it can't easily import from neighboring grids.
That's what made the 2021 winter storm so bad: gas plants froze, wind turbines iced, demand spiked from heating, and there was no meaningful import capacity to cover the gap.
What ERCOT does day-to-day
- Dispatches power plants. ERCOT runs a wholesale market that decides which plants run, when, and at what price. Lowest-bidding plants get dispatched first until demand is met.
- Manages the transmission grid. Makes sure enough capacity is available across the high-voltage wires.
- Forecasts demand. 24/7. If demand is projected to exceed supply, ERCOT calls alerts — Conservation Alerts, Energy Emergency Alerts, eventually rolling blackouts.
- Clears the wholesale market. Every 5 and 15 minutes. The prices set here eventually show up in your retail rate (with a lot of hedging and smoothing in between).
How ERCOT affects your bill
Indirectly, not directly. Your retail electric provider (REP) buys power on the ERCOT market, hedges their position, and sells you a fixed or variable retail rate. When ERCOT wholesale prices spike — summer peak, winter storm — your REP's cost goes up. On a fixed-rate contract, they eat the cost (or profit from the hedge). On a variable-rate contract, they pass some of it through.
Texas law changed after 2021 to prevent pure wholesale pass-through to residential customers. So the worst-case bill scenarios from Uri shouldn't repeat. But wholesale prices still influence retail plan pricing month over month.
Who regulates ERCOT
The Public Utility Commission of Texas (PUCT) and the Texas Legislature. After 2021 both added reliability rules — weatherization requirements for plants, mandatory reserve margins, penalties for non-compliance. Implementation is ongoing.
Conservation alerts — what to do
When ERCOT issues a Conservation Appeal, they're asking voluntary demand reduction to keep the grid stable. Effective actions: set AC to 78°F, don't run the dryer or dishwasher between 3-7 PM, turn off pool pumps. It's voluntary — nothing will happen to your bill if you don't comply — but it can actually prevent rolling blackouts.