Transmission
The Permian 765-kV build, and the half of your bill a fixed rate does not fix
Texas approved its first extra-high-voltage transmission lines, with cost estimates in the tens of billions. This is the rare grid story that reaches a household bill directly — through the part your retailer does not set.
Fixed Rate Electric Plans
What happened
Texas regulators approved a Permian Basin reliability plan that authorises the ERCOT region's first 765-kilovolt transmission lines — a voltage class the state has never built before, used to move large amounts of power over long distances with lower losses.
Utilities have since proposed specific routes under that plan, including a joint Oncor and LCRA proposal for up to 244 miles of 765-kV line. Published estimates for the extra-high-voltage lines and their associated upgrades run into the tens of billions of dollars across the Permian and other regions.
Why it matters
The Permian Basin is an unusual load: a large, growing, industrial electricity demand sitting a long way from the state's main population centres and from much of its generation. Moving power there over the existing network is increasingly constrained, and constraints on a transmission network show up as higher costs and lower reliability at the far end.
Extra-high-voltage lines are the standard answer to that problem, and building them is a decade-scale commitment rather than a project. The decision that has been made is essentially structural: the state has chosen to build the network for a much larger West Texas load rather than to limit it.
What it could mean for fixed-rate shoppers
Multi-year, structuralPlausible, not certainAffects transmission
This is the story most worth understanding for a fixed-rate customer, because it lands on the part of the bill a fixed rate does not cover. Transmission and distribution investment is recovered through the delivery charges your utility bills, those charges are set through regulatory proceedings rather than by competition, and most fixed-rate retail contracts pass changes to them straight through to you.
So a household on a three-year fixed plan is protected against its retailer repricing the energy, and is not protected against its delivery charges being adjusted. That is not a loophole or a trick — it is disclosed on the Electricity Facts Label, in the row that says whether your price can change and under what conditions — but it is the single most common surprise on an otherwise fixed bill.
The scale and timing here are worth keeping in proportion. These are multi-year construction projects whose costs are recovered over decades and spread across every customer in the affected territories, so the effect on any one monthly bill is gradual rather than a step change. What it is not is zero, and a customer who believed "fixed rate" meant "fixed bill" will notice.
What to do differently: Nothing different about which plan to choose — but when you read the Electricity Facts Label, read the row about whether your price can change. That row is what this story is about.
What we're watching
- Route approvals and construction schedules for the first 765-kV segments.
- How the costs are allocated between the Permian region and the rest of ERCOT.
- Whether large new loads are required to fund a larger share of the connections they drive.
Sources
- PUCT Approves Plan for the First Extra High Voltage Transmission Lines in ERCOT Region — Public Utility Commission of Texasprimary source
- Oncor, LCRA propose up to 244 miles of 765-kV Texas transmission — Utility Dive
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