Plans re-priced from their Electricity Facts Labels: 737
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Average price per kWh at 2,000 kWh/month, Dallas. TXU figures captured 2026-08-12 from shopping.txu.com; the third from powertochoose.org on 2026-08-13. All three include TDU delivery charges — TXU says so in its own footnote, and every Electricity Facts Label states the same basis, so these are like for like.
The same company
Same page, same day. TXU sells Simple Rate 12 at 16.50¢ and Free Nights & Cool Summer 12 at 18.20¢. The free nights cost you $408 a year.
Free nights
Your bill has two halves. The retailer sells you energy. The wires company delivers it and charges you separately, whoever you buy from. In Dallas that's Oncor: 6.03¢ a kWh plus $4.06 a month.
Free nights credits the energy half. It never touches delivery. TXU says so itself, right under the words “free nights all year”:
“Nighttime Energy Charges credited at 100% all year long. During July, August, and September, an additional credit of up to 25% on nighttime Energy Charges may apply and will be used toward daytime Energy Charges. TDU charges, taxes, and other applicable fees are not included in the credit and will be billed separately. Other eligibility rules apply.”
So every “free” kWh at 2am still costs you 6.03¢. The plan card is precise about it:
“Get free energy charges every night, all year, plus a 25% bonus toward daytime usage all summer. Rooftop solar and other customer exclusions apply.”
Free energy charges. Not free electricity. One word, whole product.
Who pays for it
Nobody gives away electricity. The overnight credit comes out of a higher rate the rest of the time. At 2,000 kWh a month that's 1.70¢ a kWh, or $34.00 a month.
Every retailer
We read the Electricity Facts Label for 737 plans across all five Texas delivery utilities to see how common this is. It isn't:
89% of listed plans are plain — one rate, no hook, no threshold. The Texas retail market is mostly boring.
So why does it feel like it's full of gimmicks? Because the hooked ones are the ones that get advertised. TXU sells ten plans on its own website and half of them carry a hook. Those are the ones on television. Here they are, priced.
That's the pattern worth knowing, and it has nothing to do with any single company. The plans marketed to you are not a random sample of the plans available to you. Television, radio and direct mail sell the hook. If you only ever see the advertising, you never meet the 89%.
Which is why every table on this site is sorted by whether the advertised price survives contact with your actual usage, and why we say which plans we read the document for and which we only inferred.
Your plans
Your delivery utility decides which plans you can buy. Not your retailer, not your ZIP. Pick yours:
It's on your bill under “TDU Delivery Charges”. How to find it
We'll suggest a utility, but we won't pretend to be certain. We tested a sample of ZIP codes against the state's own plan data and 16% of them were served by two different utilities, so a site that takes your ZIP and shows one list is guessing. Confirm against your bill before you switch.
The full Free Nights teardown — every TXU plan
on Oncor, ranked by what it actually costs.
What TXU sells you vs. what TXU lists on the state's own
comparison site — they are not the same plans.
Why your ZIP code is the wrong question.