Texas electricity is local. Not because electrons care about zip codes, but because demand, weather, housing, and congestion differ by region and time of day.

ERCOT manages the flow of power for more than 27 million Texans and about 90% of Texas electric load. ERCOT balances supply and demand 24/7, but it does not sell electricity to consumers. It coordinates the grid and the wholesale market so electricity is available when you flip the switch.

How the grid works (the local version)

Electricity must be produced when it’s used. That means the grid is a live system where supply must match demand at all times.

Where this hits home depends on where you live:

• Houston area (Harris, Fort Bend, Montgomery): long cooling season, humidity, and bigger homes in many suburbs. Bills swing hard on air conditioning usage patterns.
• Dallas–Fort Worth (Dallas, Tarrant, Denton, Collin): sharp summer peaks, cold snaps that can raise morning demand, and heavy commuter schedules that shift usage to early evenings.
• West Texas (Permian-adjacent communities): extreme heat, wind resource variability, and pockets of fast industrial load growth.
• Rio Grande Valley: long cooling season, smaller home footprints on average, and heavy late-day air conditioning usage.

Power Move: Your “electricity cost problem” is often a “time of day + home efficiency + plan structure” problem.

Why Texas is built different

Texas is largely its own interconnection with limited external connections. That gives ERCOT flexibility to respond quickly inside Texas, but it also means outside support is limited compared to grids that freely import power across many states.

That matters most during:

• extended heat waves
• sudden generation outages
• transmission constraints (think: grid rush hour)

What ERCOT watches that consumers should care about

ERCOT is heavily focused on peak demand and increasingly on net peak demand, which accounts for variable renewable generation and highlights risk periods like summer evenings when solar drops but demand stays high.

Hyperlocal version:

• Apartment-heavy neighborhoods (Inner Loop Houston, Uptown Dallas, The Domain-adjacent areas): smaller square footage but high air conditioner runtime due to heat gain and shared walls.
• Master-planned suburbs (Katy, Cypress, Frisco, McKinney): larger homes, more air conditioner tonnage, higher afternoon peaks.
• Older housing stock (parts of East Dallas, older Houston neighborhoods): insulation and ducting can dominate bills.

Power Move: The “best plan” for a 650-square-foot apartment is often a bad plan for a 2,800-square-foot house, even in the same city.

Retail choice vs non-choice, kept simple

Texas has competitive retail choice across much of the state. ERCOT’s retail market systems support switching and track millions of accounts.

But some areas are “non-opt-in” and do not offer provider choice. ERCOT’s own retail market overview calls out that Austin and San Antonio are included among major non-opt-in areas.

Local reality:

• In Houston and Dallas–Fort Worth, many addresses have choice.
• In Austin and San Antonio, many addresses do not.
• Your address decides. Not your city label.

How Gatby helps Texas households

If you want clarity that’s specific to your neighborhood:

• Email a PDF bill to 📧 bill@gatby.com
• We’ll evaluate your effective rate, plan structure, and whether your bill matches your actual usage
• Then you can shop at gatby.com if switching makes sense

No pressure. No upsell. Just Texans helping Texans keep bills predictable.