How do solar buyback plans actually work?

Texas has no statewide net metering law, so the credit for solar you send to the grid comes from whichever retail electric provider you choose, not one fixed state rule. That much is already covered in our guide on Texas net metering. What deserves its own real explanation is what a buyback plan actually does once you sign up for one, because the word covers at least three genuinely different products, and mixing them up is an easy way to misjudge what your own system will earn.

Three ways a provider can pay for your solar

Almost every solar buyback plan on the Texas market falls into one of three structures, and the difference between them can matter more than the headline rate.

What the credit actually covers

Fixed rate plans sound simple to compare on their face, a few cents per kilowatt hour, but the fine print behind that number varies by provider in ways worth checking directly rather than assuming. TXU Energy's own published terms confirm that credits on its solar plans bank without expiring for as long as you remain enrolled, but only apply to your energy charge, not your base fee, delivery charges, or taxes, and TXU does not publish its actual rate on its plan overview page at all, you have to check your own Electricity Facts Label or call to get it. Gexa Energy publishes its Solar Buyback plan more openly, a fixed export rate of 3 cents per kilowatt hour against an energy rate of about 9.3 cents, on a 12 month term with a 150 dollar early cancellation fee, and unlike TXU's structure, Gexa describes its credit as applying to energy charges, the base fee, and delivery charges together. Same basic plan type, meaningfully different fine print. That is exactly why a specific provider's terms belong in this guide as a dated example rather than a promise about what you will see when you shop, since plans like these change often enough that any number here should be reverified before you rely on it.

When the price moves with the market

Real time wholesale plans work differently from a fixed rate altogether. Instead of a set cents per kilowatt hour number, your export is paid at ERCOT's actual wholesale price at the moment it happens, refreshed roughly every fifteen minutes. Most of the time, that wholesale price runs low, often just a few cents per kilowatt hour or less, sometimes close to nothing during periods of high renewable output or mild weather.

The real story is what happens during genuine grid stress. Texas sets a hard ceiling on wholesale prices, a systemwide offer cap of 9,000 dollars per megawatt hour, equal to 9 dollars for every kilowatt hour. That is not a theoretical number. During the February 2021 winter storm, wholesale prices sat at or near that exact cap for an extended stretch while the grid was under real strain. A homeowner exporting solar on a real time wholesale plan during a stretch like that would have been paid at genuinely extraordinary rates for whatever they sent back.

That volatility cuts both ways, and it is worth being honest about which side is more common. Scarcity pricing events like the February 2021 storm are rare. Low, unremarkable wholesale pricing is the ordinary state of the market most days of most years. A real time wholesale plan suits someone who understands that tradeoff and is comfortable with a genuinely unpredictable monthly credit, not someone looking for a steady, easy to budget number.

Not everyone gets to shop for a buyback plan

Everything above assumes you live somewhere with a retail electric provider to choose from, and that assumption does not hold everywhere in Texas. Roughly one in five Texas addresses sits outside the competitive retail market entirely, served instead by a municipal utility or an electric cooperative that sets its own terms with no shopping involved. If that describes your address, none of the plan types above apply to you, since there is no provider to switch to for a better rate. Our net metering guide already covers two real examples of how differently these utilities can treat solar, Pedernales Electric Cooperative crediting at a wholesale style avoided cost rate and Bartlett Electric Cooperative carrying a full retail rate credit forward instead, and that same range holds across cooperatives generally. Before comparing buyback plans at all, confirming which situation you are in is the first real step, and it matters enough to check before you do anything else with the numbers in this guide. Enter your address into a retail plan comparison tool, and if no plans come back for it, that is a strong sign you are in cooperative or municipal territory, and the right move is contacting that utility directly rather than shopping for a rate that was never going to be offered to you.

What people try when buyback rates are low

Without a battery, power your panels produce during the day either gets used in the home right away or gets sent to the grid at whatever the buyback rate happens to be, and power used at night still comes from the grid at a normal rate. Some Texas solar installers recommend pairing a smaller, no battery system with a free nights electricity plan instead, sized to cover only the daytime load, reasoning that a typical Texas home uses roughly 60 percent of its electricity during the day and 40 percent at night, and that the free nights plan can stand in for a battery on the night side.

Based on what we found, this specific claim does not hold up. Texas summer air conditioning tends to peak in the late afternoon and early evening, right as solar production is fading, and most free nights windows do not start until 8 or 9 in the evening. Without a battery to bridge that gap, a home ends up buying grid power during exactly the hours it costs the most, since free nights plans typically charge a higher rate outside the free window to make the free hours possible in the first place, sometimes 18 to 27 cents per kilowatt hour against roughly 6 to 7 cents on a standard flat rate plan. On top of that, many free nights plans only waive the energy charge during the free hours, not the delivery charge every Texas utility adds to every kilowatt hour, so free electricity at night is often not entirely free. A commonly cited rule of thumb is that a household needs to shift at least half its total usage into the free window before a free nights plan beats a standard flat rate at all, and an undersized system with no battery does not change that math in your favor.

Add a battery and real planning, and the picture changes. A battery can charge for free overnight during the plan's free window, and again from any solar the home is not using during the day, then discharge through that same late afternoon and evening gap that breaks the no battery version, covering the home's most expensive hours with power that cost nothing to store. That is the exact piece missing from the no battery strategy above, closing the gap instead of leaving it open. Solar installers who model this combination report real bill reductions from it, though the specific dollar amounts are their own numbers, tied to a particular system size, battery size, and household usage, and are not something to take as a guarantee for any given home.

None of this means every version of pairing solar with a free nights plan is a bad idea. It means whether it works comes down to whether something, a battery paired with real planning, or a system large enough to cover the home clear through the evening, actually closes that late day gap, and to what your specific plan charges the rest of the time, delivery charges included. That is the same principle behind everything else in this guide. A confident sounding recommendation is not the same thing as knowing what a plan will actually cost you.