Assumes 3%/yr rate increases, 0.5%/yr panel degradation and no federal tax credit (the 30% §25D credit ended for systems installed after Dec 31, 2025). How we calculate
Data approachEIA rates · NREL sun hours · 2026 federal policy · methodology
In 2026, an 8 kW rooftop system in Tennessee costs roughly $26,400 before sales tax, and there is no federal tax credit to reduce it. The 30% homeowner credit ended for systems installed after December 31, 2025, and Tennessee has no net metering, so the value of solar here comes almost entirely from the electricity you use on-site. That makes this one of the more demanding solar markets in the Southeast, and it is why getting accurate numbers before you sign matters.
Solar is still a small part of Tennessee’s power mix. SEIA’s September 2026 state data puts installed solar at about 1,742 MWdc, roughly 2.3% of the state’s electricity, ranking 33rd nationally. Electric service across the state comes through the Tennessee Valley Authority (TVA), which serves a seven-state region through roughly 150 local power companies (LPCs), and TVA sets how customer-owned solar is paid. Those rules differ sharply from North Carolina, Virginia or California.
This guide uses published 2026 sources and a transparent calculation, with every input listed, so you can swap in your own numbers.
⚖️ Policy & Net Metering
Does Tennessee Have Net Metering? How TVA Pays for Solar
Tennessee has no net metering. Net metering, as in California or New York, credits exported solar at or near the retail rate. TVA does not work that way.
Customer-owned solar in TVA territory can sell power through the Dispersed Power Production (DPP) program. Under DPP, TVA pays its monthly avoided cost for all or part of your generation, and it requires a 5-year commitment. TVA’s program page lists that price at $0.034 per kWh as of October 2026, noting it is updated monthly and can change at any time. Fees and enrollment steps vary by LPC, so confirm with yours.
The older Green Power Providers (GPP) program paid better rates under 20-year contracts. It closed to new applicants at the end of 2019, though existing contracts were honored. Many articles, including earlier versions of this one, still describe GPP as if it were open to new customers; it is not.
Residential electricity in Tennessee costs less than the national average, but 2026 figures vary by source and month. EIA monthly data compiled by third parties show averages from about 13 to 15 cents per kWh this year, so this guide models 14 cents. That gap, 14 cents versus 3.4 cents, is the whole story: a kilowatt-hour you use directly offsets about four exported ones.
🏛️ Incentives
What Solar Incentives Does Tennessee Have in 2026?
Tennessee is a low-incentive state, and the biggest incentive has expired.
Federal credit. The 30% Residential Clean Energy Credit (Section 25D) ended for expenditures made after December 31, 2025, under the One Big Beautiful Bill Act, with no phase-down (Solar Power World). Homeowners who buy with cash or a loan in 2026 cannot claim it. Third-party-owned systems (leases and power purchase agreements) can still benefit from the commercial credit under Section 48E for longer, subject to deadlines, and a provider may pass part of that value through in lower payments. Compare any lease offer against the cash math below, and confirm eligibility with a tax professional.
Sales tax. Tennessee does not offer a general sales tax exemption for residential rooftop solar. The state’s exemption applies to certified green energy production facilities, which are generally commercial projects (EnergySage). Expect to pay the 7% state rate plus local tax on a home system.
Property tax. Tennessee’s Green Energy Property Tax Assessment taxes only 12.5% of the value solar adds to your property. That is a real but modest benefit.
Other. There is no state income tax credit and no statewide rebate. Any LPC rebate would be local and should be confirmed directly with your utility before you buy.
📈 Payback Period
How Long Is Solar Payback in Tennessee?
The table and chart below come from a simple calculation, not a quote. Inputs: an 8 kW system at $3.30 per watt ($26,400, the August 2026 EnergySage Tennessee average, excluding sales tax), 10,400 kWh of annual output (an assumed 1,300 kWh per kW, typical for roughly 4.5 to 5 peak sun hours), retail power at 14 cents per kWh, exports at TVA’s 3.4 cents per kWh and no federal credit.
Self-consumption
Year-1 savings
Payback (flat rates)
Payback (savings +2%/yr)
25-year net, flat rates
30%
$684
38.6 yrs
28.9 yrs
−$9,292
40%
$795
33.2 yrs
25.7 yrs
−$6,536
50%
$905
29.2 yrs
23.2 yrs
−$3,780
60%
$1,015
26.0 yrs
21.1 yrs
−$1,024
70%
$1,125
23.5 yrs
19.4 yrs
+$1,732
80%
$1,236
21.4 yrs
18.0 yrs
+$4,488
Data visualization
Tennessee solar payback by self-consumption (8 kW, no federal credit). Payback ranges from 38.6 years (30% self-use, flat rates) to 18.0 years (80% self-use, savings growing 2% a year) on a $26,400 system. Source: EnergySage 2026 cost, TVA DPP export rate, EIA 2026 retail rates.
Chart summary: Payback falls steadily as you use more of your own solar output, from about 39 years at 30% self-use to about 21 years at 80% (flat rates). Allowing savings to rise 2% a year trims that to 29 and 18 years. Only the 70% and 80% cases beat the 25-year warranty window under flat rates. Without the federal credit, a Tennessee home that is empty most of the day is unlikely to recover the cost, while a home with strong daytime use, such as remote workers, retirees or daytime EV charging, comes closest to breaking even. For state-level payback data with the ITC applied, see our guide to Solar Panel Payback Period by State. For more on this topic, see our guide to Solar Panels in Kentucky.
These are simple paybacks that ignore financing costs, panel degradation, maintenance and inverter replacement. Real quotes can be lower or higher, and the retail rate you pay matters most: each extra cent per kWh shortens payback.
The next chart shows the same system as cumulative cash flow, year by year. Each line starts at −$26,400 and adds one year of savings at flat rates (0% escalation), for three levels of self-consumption.
Data visualization
Cumulative cash flow over 25 years, 8 kW Tennessee system (no federal credit). After 25 years the 80% self-use home is $4,488 ahead, while the 30% home is still $9,292 behind. Source: model using EnergySage cost, TVA 3.4¢/kWh export rate, 14¢/kWh retail, flat rates.
Chart summary: Only the 80% self-use line crosses zero inside 25 years, in year 22 (its cumulative cash flow turns positive between year 21 at −$454 and year 22 at +$781). The 50% line ends at −$3,780 and the 30% line at −$9,292, so those homes would not recover the purchase price within the panel warranty at flat rates. Faster rate growth or a lower installed price would move every line up.
Solar vs utility company · 25-year comparison
25-year totals: 3%/yr rate increases, 0.5%/yr degradation, no federal credit. Methodology
Size the system to the power you use during the day, not to your total annual usage. Under DPP, anything beyond your on-site use is worth 3.4 cents per kWh.
An example shows why oversizing is costly. Adding 3.2 kW (40% more than 8 kW) costs about $10,500 at $3.30 per watt and produces roughly 4,160 kWh a year. If all of it were exported, it would earn only about $140 a year. The extra panels would need decades to cover their cost.
Data visualization
Installed cost by system size in Tennessee at $3.30 per watt, before sales tax and with no federal credit. An 8 kW system costs $26,400 and a 10 kW system $33,000. Source: EnergySage Tennessee average cost per watt, August 2026.
Chart summary: Cost scales in a straight line, about $3,300 for every added kilowatt. Each added kilowatt makes roughly 1,300 kWh a year, worth only about $44 if exported at 3.4 cents, so panels beyond your daytime load are the least efficient dollars in the project. Actual quotes vary by installer, equipment and roof.
South-facing roofs maximize annual output, but east- and west-facing arrays can better match morning and late-afternoon use for some households, so ask installers to compare layouts using your hourly usage. Check shading too, since tree cover is common in Tennessee neighborhoods, and ask whether your LPC requires a separate application or fee. Our solar system size calculator can help you start from your own bill.
🔋 Storage & Usage
Do Batteries and Load-Shifting Help in Tennessee?
Batteries turn low-value exports into evening self-use, but the bill savings are small. Shifting 3 kWh a day from export to evening use is worth about $116 a year (3 kWh × 365 × the 10.6-cent gap between 14 and 3.4 cents). With the federal credit gone for homeowner-purchased storage after 2025, a battery is hard to justify on bill savings alone. Its main value is backup power during outages.
Shifting loads costs little. Scheduling EV charging, laundry, dishwasher runs and pre-cooling for midday raises self-consumption without any hardware, and the table above shows how valuable each additional 10 points of self-use is: roughly $110 a year in this example. Use the solar savings calculator to test your own self-consumption assumptions.
Bottom Line
Solar in Tennessee in 2026 is a long-horizon investment. With no federal credit, no net metering and a 3.4-cent export rate, it makes the most sense for households with high daytime use and a retail rate near the upper end of the range. Get at least two quotes, ask each installer to show self-consumption and payback assumptions, and compare any lease or PPA offer on total 25-year cost.
Sources and Methodology
TVA EnergyRight, Dispersed Power Production: avoided-cost payment ($0.034/kWh, October 2026), 5-year commitment.
U.S. EIA, Electric Power Monthly, Table 5.6.A: residential retail prices; 2026 values vary by month and by third-party compilation, so the model uses 14 cents.
Model assumptions (production per kW, 2% growth, 70% case) are stated in the text and are illustrative; they are not quotes or guarantees.
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No. Nearly all Tennessee electricity comes through the Tennessee Valley Authority (TVA) and its local power companies, and TVA does not offer retail-rate net metering. Customer-owned solar can sell exported power through TVA's Dispersed Power Production (DPP) program, which pays TVA's monthly avoided cost. TVA lists that price at $0.034 per kWh as of October 2026, versus roughly 13 to 15 cents per kWh that Tennessee households pay at retail. Power you use directly from your panels is therefore worth about four times more than power you export.
Not for homeowners who buy a system. The 30% Residential Clean Energy Credit (Section 25D) ended for expenditures made after December 31, 2025 under the One Big Beautiful Bill Act, with no phase-down. Systems fully installed by that date can still claim it, and unused credit can be carried forward. Solar owned by a third party, such as a lease or power purchase agreement, may still benefit from the commercial credit under Section 48E, subject to deadlines, so ask any provider how the credit is passed through and confirm with a tax professional.
Tennessee has no state solar tax credit, no statewide rebate and no residential sales tax exemption; the sales tax exemption applies to certified green energy production facilities, which are typically commercial. The main state-level benefit for homeowners is the Green Energy Property Tax Assessment, which taxes only 12.5% of the value solar adds to your property. TVA's older Green Power Providers program, which paid better rates, closed to new applicants after 2019.
With no federal credit, an illustrative 8 kW system costing about $26,400 pays back in roughly 18 to 39 years, depending on how much of its output you use on-site. At 70% to 80% self-consumption and a 2% yearly rise in savings, payback is about 18 to 19 years; at 30% self-consumption it stretches to about 29 years even with rising rates. Because panels carry a 25-year warranty, households that are away during the day may not recover the cost, so check your daytime usage before signing.
Size it to the electricity you use during daylight hours, not your total annual consumption. Exported power earns only about 3.4 cents per kWh, so extra panels add little: an additional 3.2 kW costs roughly $10,500 at $3.30 per watt but would earn only about $140 a year if every kWh it made were exported. Ask installers to show hourly or monthly self-consumption estimates and compare at least two sizes.
Tennessee solar by electric bill
See system size and payback for common monthly bills in Tennessee.
13.87¢/kWh — Tennessee average residential price. Source: EIA Electric Power Monthly, Table 5.6.B (year-to-date through July 2026), residential average retail price (July 2026) (EIA)
Solar production
5 peak sun hours/day × 0.82 system derate. Approximate state-average daily solar resource (peak sun hours) based on NREL solar resource data (NSRDB); not location-specific — use NREL PVWatts for an address-level estimate. (NREL PVWatts)
Installed price
$3.00 per watt before incentives. Blended 2026 US residential installed price used by this site; EnergySage marketplace reported about $2.60/W (mid-2026); full-market medians are higher.
Federal tax credit
$0 for homeowner-owned systems installed in 2026 — the 30% §25D credit ended Dec 31, 2025 (IRS)
Net metering
No statewide net metering — utility-dependent — solar assumed to offset 55% of the bill. Most of Tennessee is TVA territory with no retail net metering; exports are credited at a low wholesale-based rate.
Estimates only — not tax, legal or financial advice. Get at least three installer quotes and confirm incentives with your utility and a tax professional.