Awareness Expert Reviewed

The Texas Power Grid, Explained

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

By Marcus Chen 9 min read Updated April 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%.

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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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MC

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

— Marcus Chen, Senior Editor

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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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Marcus Chen

Senior Editor

Sarah covers the Texas deregulated electricity market with a focus on rate analysis, consumer protection, and the math behind every plan. She holds the CFA charter and has 8+ years on the energy desk.

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 Marcus Chen. Articles are reviewed by certified energy market analysts.

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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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