Solar Panel Payback Period in Tennessee
Solar panels in Tennessee pay for themselves in about 18 years at 2026 prices, based on 4.5 peak sun hours and $0.122/kWh electricity. Calculate your exact ROI, 25-year savings, and break-even point.
Data last updated July 2026. Sources & methodology
What Tennessee Residents Should Know
Tennessee averages 4.5 peak sun hours per day, which is near the national average. A typical 7.5 kW residential system costs about $2.85 per watt installed — roughly $21,375. Note that the 30% federal residential solar credit ended December 31, 2025, so purchased systems no longer receive a federal discount; leased and PPA systems may still capture savings indirectly through the commercial credit claimed by the system owner.
At Tennessee's electricity rate of $0.122 per kWh, a 7.5 kW system producing roughly 9,600 kWh per year offsets about $1,171 in annual electricity costs. At full purchase price, the estimated payback period is around 18 years, with many years of essentially free electricity after that. Over 25 years, homeowners can expect total savings of $7,905 — state incentives, where available, improve this further.
Tennessee does not currently offer statewide net metering, which means excess solar energy may not be fully credited. However, many utilities have their own buyback programs, and pairing solar with a home battery system can help you store and use more of your own production, improving overall ROI regardless of net metering policy.
Solar pays off fastest in Tennessee for homeowners with high electricity usage, an unshaded south-facing roof, and plans to stay put through at least the payback window. Because retail power prices tend to climb a few percent every year, owning panels also locks in today's rate and hedges against future bill increases — a benefit that grows the longer you own the system. Enter your own bill and roof details in the calculator above for a payback estimate tailored to your home.
Avg. Electricity Rate
$0.122/kWh
Avg. monthly bill: $140
Peak Sun Hours
4.5 hrs/day
Solar cost: $2.85/watt
Net Metering
Not Available
Incentives in Tennessee
Federal clean energy tax credits ended in late 2025 under legislation passed in July 2025; they are shown below for reference since recent purchasers may still claim them. State programs are governed separately and many remain active — always verify current details with the program before purchasing.
| Incentive | Type | Amount | Description |
|---|---|---|---|
| Residential Clean Energy Credit (25D Solar ITC)Ended | tax credit | 30% | 30% federal tax credit for purchased home solar systems. Ended December 31, 2025 — installations completed after that date do not qualify. Leased and PPA systems may still benefit indirectly through the commercial (48E) credit claimed by the system owner. |
| Tennessee Green Energy Property Tax Assessment | exemption | Varies | Certified green-energy systems are assessed at a reduced value (about 12.5% of installed cost for solar), lowering the property-tax impact of installing a system. |
Solar Payback in Tennessee: Frequently Asked Questions
- How long does it take for solar panels to pay off in Tennessee?
- In Tennessee, a typical 7.5 kW system costing about $21,375 offsets roughly $1,171 of electricity per year at the state's $0.122/kWh rate, for an estimated payback of about 18 years at full purchase price. Your actual timeline depends on your usage, financing, and any state or utility incentives.
- How much do solar panels cost in Tennessee?
- Installed residential solar in Tennessee averages about $2.85 per watt, so a typical 7.5 kW system runs around $21,375 before any incentives. The 30% federal residential solar credit ended December 31, 2025, so purchased systems no longer receive a federal discount.
- Does Tennessee have net metering?
- Tennessee does not currently offer statewide net metering, so exported solar energy may earn little or no credit. Pairing panels with a home battery lets you store and use more of your own production to improve ROI.
- How much can solar save over 25 years in Tennessee?
- Over a 25-year system life, a 7.5 kW system in Tennessee can save roughly $7,905 net of its upfront cost, assuming electricity prices keep rising. State incentives, where available, improve this further.
- Are there solar incentives in Tennessee?
- Yes. Tennessee offers Tennessee Green Energy Property Tax Assessment. Program funding and eligibility change over time, so verify current details before you buy.
Run the Solar Payback Calculator
Use our free calculator pre-filled with Tennessee data to see your personalized results.
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