What Is ERCOT?

What ERCOT Does

ERCOT stands for the Electric Reliability Council of Texas. It is the organization that manages the flow of electricity across the Texas power grid, serving about 27 million customers across most of the state.

Think of ERCOT as an air traffic controller for electricity. They do not own any power plants or power lines. Instead, they coordinate the entire system — making sure the amount of electricity being generated matches the amount being used, every second of every day.

ERCOT’s Main Responsibilities

Balancing supply and demand. Electricity cannot be easily stored at scale, so generation must match consumption in real time. ERCOT monitors the grid 24/7 and directs generators to ramp up or down as demand changes throughout the day.

Running the wholesale market. ERCOT operates the market where power generators sell electricity. Prices on this market change every 15 minutes based on supply and demand. REPs buy electricity from this market to resell to customers like you.

Managing grid reliability. ERCOT forecasts electricity demand days, weeks, and months in advance. When they see potential shortfalls, they take steps to secure additional generation or issue public alerts asking Texans to conserve.

Processing retail transactions. When you switch electricity providers, ERCOT processes the switch on the wholesale side. They also handle the metering data that flows between TDUs and REPs.

Why Texas Has Its Own Grid

The United States has three major power grids: the Eastern Interconnection, the Western Interconnection, and the Texas Interconnection. Texas is the only state with its own independent grid (though small parts of Texas connect to the other two grids).

This separation dates back to the early 1900s, when Texas utilities decided to stay within state borders to avoid federal regulation under the Federal Power Act. The law gives the federal government authority over utilities that sell electricity across state lines. By keeping its grid self-contained, Texas maintains control through the Public Utility Commission of Texas (PUCT) rather than the Federal Energy Regulatory Commission (FERC).

The practical effect is that Texas sets its own rules for electricity markets, generation requirements, and grid standards. This independence has advantages — faster decision-making and market-driven investment in generation — but it also means Texas cannot easily import power from neighboring states during emergencies.

How ERCOT Affects Your Electricity Bill

ERCOT does not directly set your electricity rate, but their operations affect it in several ways:

Wholesale prices. The cost your REP pays on the ERCOT wholesale market influences the rates they offer. When wholesale prices are low (during mild weather and abundant generation), retail rates tend to follow.

Grid fees. ERCOT charges small administrative fees that are passed through to consumers. These fees are tiny compared to your energy and delivery charges.

Market events. During extreme weather or grid stress, wholesale prices can spike dramatically. REPs with fixed-rate plans absorb this cost. REPs with indexed plans pass it directly to customers.

ERCOT’s Governance

ERCOT is technically a nonprofit corporation governed by a board of directors. After the 2021 winter storm, the Texas Legislature restructured ERCOT’s governance. The board is now appointed by the governor, lieutenant governor, and speaker of the House. The PUCT provides direct oversight, and the Texas Legislature sets the rules through legislation.

What ERCOT Does Not Do

It helps to be clear about what falls outside ERCOT’s responsibilities:

• They do not sell electricity to homes or businesses
• They do not own power plants or power lines
• They do not send you a bill
• They do not handle power outages at your home (that is your TDU)
• They do not set retail electricity rates (that is your REP)

The Bottom Line

ERCOT is the organization that keeps the Texas power grid running. They balance electricity supply and demand, operate the wholesale market, and manage grid reliability. While you will never deal with ERCOT directly, their work behind the scenes affects the price and reliability of the electricity that powers your home.