Solar Panel Cost in Tennessee (2026 Estimate)

BySunMetricLab Editorial Team·Independent solar research and calculators

Data last updated September 10, 2026 · ranks #39 of 50 states for modeled payback

Tennessee averages about 4.4 peak sun hours a day (below the national average) with an approximate residential electricity rate near 12¢/kWh, on the lower end nationally. In the model used here, an 8 kW system in Tennessee produces roughly 10,280 kWh a year and trims about $1,200 off annual electricity costs, paying back its net cost in about 12.3 years. That is a middle-of-the-pack payback, so whether solar is worth it in Tennessee often comes down to your specific rate, roof, and any state or utility incentives.

Estimated system cost and payback in Tennessee

Costs assume roughly $2.70/watt installed for Tennessee; the net column applies a 30% federal credit for comparison with quotes that include it. Savings and payback use the state's sun hours and rate above.

The 30% federal Residential Clean Energy Credit ended for systems paid for after December 31, 2025 under the 2025 federal budget law. Net-after-credit figures apply only if you still qualify (for example a 2025 expenditure, or a leased system where the installer passes a credit through). Confirm with a tax professional.

What moves the numbers in Tennessee

Two inputs drive most of the difference between states: how much sun a system sees and what each offset kilowatt-hour is worth. Tennessee's 4.4 sun hours set production, and its roughly 12¢/kWh rate sets what that production saves. The bigger unknowns are your roof, shading, and how your utility compensates exported power, since a lower export rate can pull real savings below the retail-rate figure above.

Net metering and export credits in Tennessee

Almost the entire state buys its power from the Tennessee Valley Authority, and TVA does not allow its local power companies to offer traditional net metering. Instead, a rooftop system reduces the electricity you pull from the grid at your normal retail rate, while any surplus that flows back is purchased separately at TVA's avoided-cost rate through its Dispersed Power Production arrangement. The older Green Power Providers program, which paid a premium for all generation, closed to new participants at the end of 2019 and is not coming back.

Getting connected runs through your local power company's Green Connect interconnection process, which sets the metering configuration and paperwork. Because the export rate is far lower than retail, installers in the Valley usually size systems to match daytime loads rather than to cover an entire annual bill. Northeast Tennessee around Kingsport is served by Appalachian Power rather than TVA and follows that utility's own distributed generation terms, so check which supplier you have before assuming any of this applies.

Tennessee solar incentives beyond the federal credit

Tennessee has no state income tax on wages, so there is no state solar credit, and the state has never run a rebate program for residential panels. The tax code does treat certified green energy production facilities favorably for property tax purposes, valuing solar equipment at a small fraction of its installed cost, and installers often handle the certification paperwork with the state. Sales tax generally still applies to residential installations unless a specific exemption fits, so ask for a quote with tax itemized.

TVA's EnergyRight program and the Home Uplift initiative focus on efficiency and weatherization for income-qualified households rather than solar, though pairing the two can shrink the system you need. The federal 30 percent credit remains the biggest single incentive here, and as of 2026 you should verify whether any TVA distributed generation incentive has been reintroduced before you sign.

Utilities and rate plans in Tennessee

The local power companies that actually bill you include Nashville Electric Service, Memphis Light, Gas and Water, EPB in Chattanooga, Knoxville Utilities Board, and Middle Tennessee Electric, plus dozens of smaller municipal systems and cooperatives, all buying wholesale power from TVA. Retail rates run below the national average, which stretches the payback period for solar compared with the coasts. Several local power companies have also added grid access or fixed charges that do not shrink when you generate your own power, so a system that fits your daytime consumption pattern will perform better than one built around selling surplus.