For Texas residential homeowners and renters shopping the deregulated retail electricity market. Plan details and rates are subject to change; the Energy Facts Label available from each REP is the authoritative source for price, term, and fees.
Free nights plans in Texas may look the same across a consumer's screen, but actually, the plans you can sign up for are determined by your ZIP code. Your ZIP code, which gives your friends an easy way to send you a birthday card, tells the grid which Transmission and Distribution Utility (TDU) powers you, and that TDU dictates which retail providers, and subsequently, which free nights plans are offered to you.
I see this confusion every week. A homeowner reads a comparison page and sees a plan with a 9 p.m. to 6 a.m. free window, signs up, and learns at enrollment that the plan is not offered in their service territory. Even worse, a household in a city like Austin or San Antonio has no choice at all because a city utility, not a retail provider, owns the meter.
This guide clears up that confusion. I will connect the five Texas TDUs to cities and ZIP prefixes, explain the municipal and cooperative carve-outs that block access, and detail an original framework I built and call the ZIP-to-Match Framework, a 3-step process to land on the best free nights plan for your address.
Most of Texas runs a deregulated retail electricity market, a structure created by Senate Bill 7, signed by Governor George W. Bush on June 18, 1999, and phased in to customers starting January 1, 2002. According to coverage and historical data summarized in the public deregulation overview of the Texas electricity market, about 85 percent of Texas power consumers shop in this deregulated zone. The remaining 15 percent either live in cities that chose to stay bundled or in rural co-ops.
The deregulated zone is unusually wide open on the supply side. According to the PUCT's alphabetical directory of Retail Electric Providers, 140 active REPs are licensed to sell power in Texas as of the most recent directory update.
Each address in this zone has two companies serving it:
Free nights plans are a product of retail marketing. Each REP files its plans with a specific TDU footprint at the Public Utility Commission of Texas (PUCT), but REPs are not obligated to file plans for every TDU. That is why one retailer may have free nights plans in Houston (CenterPoint Energy territory) but not in Lubbock (Oncor and South Plains Electric Co-op territory), and vice versa.
The PUCT's official shopping site, Power To Choose, is the quickest way to see which plans your ZIP code is eligible for. Enter your ZIP code, filter by "Plan Type," and select time-of-use. Plans that are unavailable in your area will not show up.
The deregulated section of the Electric Reliability Council of Texas (ERCOT) is served by five TDUs. ERCOT runs the grid for about 90 percent of the state's electric load. According to ERCOT's all-time peak demand records page, the grid set its all-time peak demand record at 85,508 MW on August 10, 2023. The TDU maps below come from each utility's published service-area documents.
Oncor is the largest TDU in the state by customer count. According to Oncor's published company facts, the utility serves over 4 million meters across about 400 cities. Major service areas include:
Verify Oncor coverage on the Oncor service area lookup.
CenterPoint extends to the greater Houston metropolitan area and a ring of Gulf Coast counties down to the Brazoria line. According to CenterPoint's published company facts, CenterPoint serves over 2.7 million metered customers.
AEP Texas Central services the coastal bend and Lower Rio Grande Valley.
AEP Texas North serves the Abilene and West-Central Texas region.
TNMP serves pockets, not connected regions, which is what trips up new Texans the most.
Given the patchy nature of TNMP territory, a ZIP-level check at Power To Choose is critical here. Two neighbors a mile apart may have different TDUs, and therefore different free nights plans available.
I built this framework after running the same plan-fit check for households across all five TDUs. The ZIP-to-Match Framework is an original 3-step process I use that takes about 20 minutes and prevents the most common overpay mistake, which is signing up for a free nights plan when the household's actual usage profile makes it a worse deal than a flat rate.
The framework has three sequential steps. Each step has a clear input (something you can pull from a public source) and a clear output (a decision you can act on).
Use your service ZIP at Power To Choose to determine your TDU. The site will display the TDU beside the rates. For areas with multiple TDUs (common in suburbs and near city limit lines), check your latest electric bill for a line item labeled "TDU Delivery Charges," "Delivery Fees," or similar.
Why this matters: a free nights plan from Reliant runs on the Reliant retail side, but the TDU charges, which can account for about 25 to 35 percent of a typical residential bill per analysis from independent shopping marketplaces, are passed through whether your bedtime is 8 p.m. or midnight. Knowing your TDU is also the only way to compare like to like across plans.
The free hours are different for each plan. Here is a breakdown of the major Texas free nights offers and their free windows:
Texas requires every deregulated REP to provide kWh data through the state's Smart Meter Texas portal, in 15-minute intervals. Register your account, download a recent 30-day usage CSV, and add up the kWh that falls inside the plan's free window.
According to EIA-cited figures aggregated by ChooseTexasPower, the average Texas residential household uses about 1,096 kWh per month, among the highest residential usage figures in the country. That high baseline is what makes free nights plans interesting in Texas in the first place, but only if enough of it lands inside the free window.
The 20/35 rule of thumb I use inside the framework:
Every Texas retail plan must publish an Electricity Facts Label (EFL), a one-page disclosure mandated by PUCT Substantive Rule 25.475. The EFL lists the average price per kWh at 500, 1,000, and 2,000 kWh of monthly usage, the contract length, the early termination fee, and the energy charge during peak hours.
Three lines I check on every free nights EFL:
You can request any plan's EFL directly from the REP, or pull it from Power To Choose by clicking the plan name.
The framework's value is in the order: TDU first (so the candidate plan list is real), usage second (so the math is yours, not a marketing chart's), EFL third (so the contract terms back up the rate). Skip any step and the answer gets less reliable.
| TDU | Major Cities | Typical Free Nights Plans Available |
|---|---|---|
| Oncor | DFW, Tyler, Killeen, Waco, Midland-Odessa | TXU Free Nights and Weekends, Reliant Truly Free Nights, Direct Energy Twelve-Hour Power, Just Energy Nights Free |
| CenterPoint Energy | Houston, Sugar Land, Katy, Galveston | TXU Free Nights and Weekends, Reliant Truly Free Nights, Direct Energy Twelve-Hour Power, Just Energy Nights Free |
| AEP Texas Central | Corpus Christi, Laredo, McAllen, Harlingen | Reliant Truly Free Nights, Just Energy Nights Free, Pulse Power free-nights variants |
| AEP Texas North | Abilene, San Angelo, Vernon | TXU Free Nights and Weekends, Pulse Power, select Direct Energy plans |
| TNMP | Lewisville, League City, Friendswood, parts of Panhandle | Limited selection; verify each plan at the ZIP level on Power To Choose |
Plan availability and free hours change as REPs file new versions with PUCT. Use the table to narrow the shortlist, then confirm on the EFL the day you enroll.
For a deeper read on the trade-offs, my free nights vs. free weekends comparison and the pillar guide Free Nights Electricity Plans in Texas go deeper than the table.
If you live inside one of these service areas, you cannot shop a retail free nights plan. The local utility is the only seller, and its rate structure may or may not include a time-of-use option. Always call the utility to confirm.
If your address falls inside one of these, the right move is usually a behavior shift (run laundry and dishwashers off-peak, set the thermostat back overnight) rather than waiting for a free nights plan that will not come. My piece on shifting your energy usage to nights walks through the behavior side.
Three checks, in order of speed:
Households in Texas frequently sign up for incorrect plans because they skip this check. Dr. Joshua Rhodes, a research scientist at the University of Texas at Austin's Webber Energy Group, said in published Texas grid analyses that time-of-use plans are effective if and only if the household's load profile aligns with the rate structure. Dr. Michael E. Webber, Josey Centennial Professor in Energy Resources at UT Austin and founder of the Webber Energy Group, said that retail electricity choice in Texas pays off only when customers do the homework on their own load shape rather than chasing a headline rate. Lynne Kiesling, PhD, an energy economist and research professor at Carnegie Mellon University's College of Engineering, has likewise argued that time-of-use rates only deliver consumer welfare when paired with transparent disclosure of the underlying tariff structure. The TDU-and-EFL check is how you do that homework before you sign, not after.
Four traps I see repeatedly:
A look at solar plus battery plus free nights, for households that pair the plan with rooftop generation, lives in the Texas Triple Play piece.
Are free nights plans offered in every Texas ZIP code?
No. They are sold only in the deregulated portion of ERCOT, which covers about 85 percent of Texas power customers. If your ZIP falls inside a municipal utility (Austin Energy, CPS Energy, Denton Municipal Electric, and others) or a non-deregulated co-op, you cannot enroll in a retail free nights plan. The municipal utility may still offer a time-of-use rate; call to ask.
How do I find my TDU from my ZIP code alone?
Enter your ZIP at powertochoose.org and the TDU will appear beside the plan list. If your ZIP falls in a multi-TDU area (common in DFW suburbs and Gulf Coast suburbs), the site will ask for your address. Cross-check by looking at "TDU Delivery Charges" on your current bill.
Which Texas free nights plan has the longest free window?
As of recent EFL filings, Direct Energy Twelve-Hour Power offers 9 p.m. to 8:59 a.m., the widest of the major plans. Reliant Truly Free Nights runs 8 p.m. to 6 a.m., a 10-hour window with the earliest start.
Do free nights plans cost more for daytime electricity?
Yes. Industry analysis of Texas EFLs shows daytime energy charges on free nights plans run 30 to 60 percent higher than the daytime portion of a comparable fixed-rate plan in the same TDU. The math works only when your free-window usage is high enough to offset the elevated day rate.
Can I switch to a free nights plan if I am in a current contract?
You can, but you may owe an early termination fee. Texas law removes the fee if you are moving to a new address. Without a move, the fee is typically 150 to 295 dollars depending on the REP. The PUCT requires the fee amount on the EFL.
Do free nights plans exist for small businesses?
A few REPs offer commercial time-of-use products in deregulated territory, but most free nights plans are residential. A commercial broker can run a quote by ZIP and meter type if your business runs a heavy nighttime load profile.
If you are in deregulated Texas, run the ZIP-to-Match Framework this week:
If your free-window share of usage is at least 35 percent, a free nights plan in your TDU footprint is likely the cheaper path. If it is below 20 percent, a flat fixed-rate plan will save more money with less behavior change required.
For a side-by-side review of the underlying product, the pillar guide Free Nights Electricity Plans in Texas covers every plan currently filed with PUCT in the major TDU footprints. If you are still on the fence about whether a free nights plan fits your household at all, my are free nights plans worth it analysis is the better starting point.
Free nights plans reward households that can move load. Your ZIP code tells you whether you can play the game in the first place, and if you can, which version of the game is available at your door.
Plan details and rates are subject to change; the Energy Facts Label available from each retail provider is the authoritative source for price, term, and fees. Enrollment is subject to credit approval and provider availability at your service address.
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