Trevor has worked in home improvement and residential solar since 2016 and maintains the EcoGen Solar Cost Index.
Tennessee is a state where the answer, for most households, is no. Rooftop capacity here fell 6.0% over the past year, one of only two declines among the 17 states with no residential third-party-ownership providers, alongside Alabama. The market is telling you something, and it is worth understanding what before you spend $31,008.
The Gap Between What You Pay and What You Are Paid
Tennessee has no state net metering law. Nearly every household here is served, directly or through a local power company, by the Tennessee Valley Authority, and TVA sets the terms for what your roof sends back through its Dispersed Power Production arrangement.
To compare the Tennessee case against the whole country, start with our is-solar-worth-it national guide.
Measure | Tennessee figure | Effect on the decision |
|---|---|---|
What you pay for electricity | Your local power company’s retail rate, typically 11 to 12¢ (13.48¢ statewide average, all rates) | Power you use yourself is worth your local rate, not the statewide average |
What TVA pays for exports | About 3.635¢ per kWh | Power that leaves is worth roughly a third as much |
Annual output per kW | 1,358 kWh | Modest for the Southeast; 4.89 peak sun hours |
Typical system | 10.2 kW, $31,008 | One of the largest typical systems in the country |
Read those four rows together and the problem is visible. Tennessee households use a lot of electricity, so systems here are sized large, at 10.2 kW against a monthly usage around 1,154 kWh. A large system on an average roof produces a great deal of midday power that an average household is not home to use, and every unit of that surplus is worth 3.635¢ instead of the 11 to 12¢ you pay your local power company.
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What That Does to the Numbers
A 10.2 kW Tennessee system produces 13,852 kWh a year. Here is what it returns, depending on how much of that the house absorbs directly instead of exporting at 3.635¢.
Household pattern | Share used directly | Simple payback | Verdict |
|---|---|---|---|
Home all day, heavy summer cooling | Around 90% | About 21 years | Marginal at best, and rare |
Partly occupied, mixed usage | Around 75% | About 23 years | Marginal |
Out during the day, evening-heavy | Around 50% | About 30 years | No |
Tennessee electricity has risen around 2.70% a year over five years, which would pull these numbers in somewhat; financing the system would push them back out. The bottom row is where the largest share of Tennessee households actually sit.
Panels carry production warranties around twenty-five years. A thirty-year payback means the system finishes its warranted life without having returned its cost. That is not a slow investment; it is not an investment.
Who Solar Still Works For in Tennessee
The answer is not nobody. There is a real profile here, narrower than the sales conversation suggests.
- Someone at home through the day with heavy air conditioning use. Tennessee summers are long and humid, cooling load peaks in the afternoon, and afternoon is when the roof produces. This household absorbs most of what it makes and lands near twenty-one years.
- A household adding a battery and willing to count its full cost. Storage converts 3.635¢ exports into evening use worth your 11 to 12¢ retail rate. It also adds cost, so ask for the payback modeled with and without storage, on your own usage pattern.
- Anyone whose priority is not the money. Outage resilience with storage, or emissions, are legitimate reasons to install. They are just different reasons, and they should be stated plainly.
- A household planning significant electrification. An electric vehicle charged at home during daylight raises direct use substantially, which is the single most effective way to improve these figures. Size the array to that daytime load rather than to annual consumption.
Two Things That Should Never Enter Your Calculation
Both come up often enough in Tennessee to be worth naming directly.
The federal tax credit. Section 25D is $0 for purchased systems whose installation is completed after December 31, 2025 under Public Law 119-21. A Tennessee quote that still shows a 30% federal credit is either out of date or describes an arrangement in which a company, not you, owns the system. That company may qualify for the separate Section 48E business credit under current deadlines, and whether any of that value reaches your payment depends on the contract. Residential PPA legality in Tennessee is unclear, so ask for the legal basis of the contract and the credit treatment in writing.
TVA Green Connect. This is a quality program for contractors and interconnection, not a payment to homeowners. It appears in Tennessee sales material often enough that it is worth being clear: participation does not put money in your pocket and belongs nowhere in a payback estimate. If a proposal implies otherwise, ask exactly which dollar figure it contributes. The answer is none.
What Would Change the Tennessee Math
Three things would overturn this verdict, and none of them are speculation about the distant future.
- A change in what TVA pays for exported power. The single most sensitive number in the calculation. Moving it toward retail would compress every figure in the table above.
- Faster electricity price rises. At 2.70% a year Tennessee is toward the slow end. A sustained acceleration shortens payback across the board.
- Installed cost falling. At $3.04 per watt Tennessee sits about 5% above the national average, 37th cheapest, so there is room for prices to fall. A contracting market usually pushes prices the wrong way, which is one reason the 6.0% decline matters.
Until one of those moves, this is the arithmetic a Tennessee homeowner is deciding against. Our Tennessee incentives guide sets out what the state does and does not offer, and the Tennessee installer list covers who works here if you are in the profile that clears.
Methodology: system size, production and cost use the EcoGen Solar Cost Index for Tennessee, $3.04 per watt as of March 1, 2026, with a 1,358 kWh per kW production factor. Payback is simple payback at a local retail rate of 11 to 12¢ (the 13.48¢ EIA March 2026 figure is the statewide average, used for ranking only; the 16.6-year figure in our Tennessee cost guide is the full-retail ceiling at that average) and TVA’s September 2025 Dispersed Power Production rate of 3.635¢ for exports, which posts monthly. Payback figures are simple payback before financing, rate escalation and degradation; no federal residential credit is applied to owner-purchased systems.
Tennessee Solar FAQs
Are solar panels worth it in Tennessee?
For most Tennessee households, no. Our modeling puts simple payback at about 30 years for a household that is out during the day, which is longer than the equipment is warranted for. It falls to around 21 years for a household at home through the day with heavy air conditioning use, which is marginal at best. The deciding factor is that TVA pays about 3.635¢ for exported power against local retail rates of 11 to 12¢, so power you do not use yourself is worth roughly a third as much. Even the best case only works if you own the home for the full life of the system and your local power company adds no distributed-generation fee, so check both before you sign.
Does Tennessee have net metering?
No. Tennessee has no state net metering law. Nearly every household is served directly or through a local power company by the Tennessee Valley Authority, which sets export terms through its Dispersed Power Production arrangement at roughly 3.635¢ per kilowatt-hour. That is a purchase of your surplus at a wholesale-style rate rather than a retail credit against your bill, and it is the central reason Tennessee payback periods run long.
Why is Tennessee rooftop solar shrinking?
Installed residential capacity in Tennessee fell 6.0% over the past year, one of only two declines among the 17 states with no residential third-party-ownership providers, alongside Alabama. The economics are the most likely explanation: a low export rate, no state net metering law, no state tax credit, and a federal residential credit that went to $0 for purchased systems whose installation is completed after December 31, 2025. A contracting market also tends to keep installed prices from falling, which compounds the problem.
Does TVA Green Connect pay Tennessee homeowners?
No. Green Connect is a quality and interconnection program for contractors, not a payment to homeowners. It appears in Tennessee sales material frequently enough to cause confusion, and it contributes nothing to a payback calculation. If a proposal implies that participation produces savings, ask which specific dollar figure it contributes and expect the answer to be none.
Would a battery make solar worth it in Tennessee?
It changes the arithmetic more here than in most states, because it converts power that would otherwise export at 3.635¢ into evening use worth your 11 to 12¢ retail rate. That is roughly a threefold improvement on the affected units. It also adds significant cost, so ask for the payback modeled both with and without storage, on your own usage pattern.
If you think your household is the exception, the proof is in your own usage data. Enter your ZIP code and we will match you with an installer who will model payback on your interval data, with and without storage.
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References & Research Sources
EcoGen America reviewed the Tennessee Valley Authority’s Dispersed Power Production arrangement for the export rate of roughly $36.35 per megawatt-hour, equivalent to about 3.635¢ per kilowatt-hour, and TVA Green Connect program documentation confirming it is a contractor quality and interconnection program rather than a homeowner payment; the Database of State Incentives for Renewables and Efficiency for the absence of a Tennessee net metering statute and of any state residential solar tax credit; EIA Electric Power Monthly for the 13.48¢ statewide average residential price and the five-year growth rate of roughly 2.70% a year; independent analysis of state rooftop markets for the 17.5 MW installed base and the 6.0% annual decline; and IRS guidance on the Public Law 119-21 termination of Section 25D for systems whose installation is completed after December 31, 2025. Output of 1,358 kWh per kilowatt per year, 4.89 peak sun hours, the 10.2 kW system size, the $31,008 installed cost and the $3.04 per watt figure are EcoGen America figures at the state benchmark as of March 1, 2026. The payback figures are our own calculation from those inputs and are simple payback before financing, rate escalation and degradation. Sources accessed between June 10 and August 17, 2026.
