Awareness Expert Reviewed

The Texas Power Grid, Explained

From generation to your outlet — the full journey of a kilowatt-hour in Texas.

By ChooseMyPower Editorial 9 min read Updated May 2026

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Key Takeaways

Generation, transmission, and retail are three separate businesses in Texas.
TDUs (Oncor, CenterPoint, AEP, TNMP) own the wires — you can't pick them.
The Texas grid is "islanded" with limited DC interconnects to neighboring grids.
Reliability is measured in reserve margins; ERCOT targets 13.75%.

This guide walks through the core decisions and pitfalls for Texans shopping for electricity. Full article content is ported from the design prototype. For production, connect this to your CMS or Convex content collection.

The three-layer model: generation, transmission, retail

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Who owns the poles and wires (TDUs)

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How energy flows from plant to plug

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Why Texas is islanded

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What reliability actually means

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“When the wind stops blowing in West Texas, you don't notice. When 4,000 MW of generation drops in 90 seconds, you do.”

— ChooseMyPower Editorial, Editorial team

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The Bottom Line

From generation to your outlet — the full journey of a kilowatt-hour in Texas.

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Editorial Independence: ChooseMyPower is editorially independent. Our opinions are our own. We may earn a referral fee when you enroll through our partner ComparePower.com — this never influences our rankings or editorial content.

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Editorial team

Articles on ChooseMyPower are written and reviewed by the editorial team. Plan and rate data on every page is pulled from the live electricrates.org API on every build, so the numbers you see reflect the current Texas market.

Editorial Standards

How we research and review.

Independently researched. Every claim is verified against primary sources (PUCT, ERCOT, EFLs).
No paid placement. Rankings are never influenced by advertising or referral compensation.
Reviewed by ChooseMyPower Editorial. Plan data is pulled live from the electricrates.org API on every build and cross-checked against the EFL each REP publishes.

Read our full standards

Sources

ERCOT — Capacity, Demand and Reserves Report
NERC — Reliability Standards Manual
PUCT — Transmission Planning Reports
EIA — Texas Electric Power Industry Profile

Sources are cited for informational purposes. Data may have been updated since publication.

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Frequently asked questions

Common questions related to awareness.

Where do you get your data? +

We source plan and rate data from public REP filings, the Electricity Facts Label (EFL) every plan must publish, and the live ComparePower.com database. Updates flow daily.

Are recommendations independent? +

Yes. ChooseMyPower's rankings and recommendations are made independently from any compensation we may receive when you enroll through our partner.

How often is this guide updated? +

We revisit guides on a quarterly basis at minimum, and immediately when material market or regulatory changes happen.

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