2026 · No Federal Tax Credit · NREL + EIA Data
Solar Panels in Tennessee: Cost, Payback & ROI (2026)
Is solar still worth it in Tennessee after the 30% federal tax credit expired? These pre-computed estimates use NREL PVWatts production data and current 11.5¢/kWh Tennessee electricity rates for a typical home using 900 kWh/month.
Section 25D (30% federal solar tax credit) expired December 31, 2025
All numbers below reflect 2026 math with no federal residential credit. State incentives, where applicable, are noted in the section below.
Tennessee Solar at a Glance
Based on a 900 kWh/month home ($104/mo electric bill at 11.5¢/kWh), 100% offset, no state rebate applied.
7.8 kW
For 900 kWh/month home
$23,087
At $2.95/W (LBNL 2024 avg)
16.0 years
Without state rebate
$1,242
Estimated annual savings
$39,718
Cumulative before rebate
$16,631
Savings minus system cost
11.5¢/kWh
below average vs. 16.0¢ U.S. avg · EIA 2025
1,380 kWh/kW/yr
moderate · 4.2 peak sun hrs/day · NREL PVWatts
Is Solar Worth It in Tennessee in 2026?
Tennessee's 11.5¢/kWh rate is below the national average, driven by TVA's large hydro and nuclear fleet. The Tennessee Valley Authority's Green Power Providers program pays a fixed rate for solar generation but is below retail price, which limits the simple ROI case. TVA service territory dominates most of the state.
For a typical Tennessee home consuming 900 kWh per month, our calculation shows a 7.8 kW system needed for 100% offset. At the current national average installed cost of $2.95/W (LBNL Tracking the Sun 2024), that's $23,087 gross before any state rebates. Year-one savings of $1,242 grow each year as electricity rates escalate — the model assumes 2.5%/year (EIA AEO 2024).
The 16.0 years payback period is longer than the national average due to low electricity rates or limited solar resource. Over 25 years — the standard warranty period for most premium panels — a Tennessee homeowner following this profile would save an estimated $39,718 total, for a net benefit of $16,631 after recovering the system cost.
Year-by-Year Savings Snapshot: First 10 Years
Based on 7.8 kW system, 0.5%/yr degradation, 2.5%/yr rate escalation, no state rebate.
| Year | Production (kWh) | Annual Savings | Cumulative |
|---|---|---|---|
| Year 1 | 10,800 | $1,242 | $1,242 |
| Year 2 | 10,746 | $1,267 | $2,509 |
| Year 3 | 10,692 | $1,292 | $3,801 |
| Year 4 | 10,639 | $1,318 | $5,118 |
| Year 5 | 10,586 | $1,344 | $6,462 |
| Year 6 | 10,533 | $1,370 | $7,832 |
| Year 7 | 10,480 | $1,398 | $9,230 |
| Year 8 | 10,428 | $1,425 | $10,655 |
| Year 9 | 10,375 | $1,454 | $12,109 |
| Year 10 | 10,324 | $1,483 | $13,592 |
System cost to recover: $23,087. Table shows savings without state rebate applied. Use the interactive calculator to enter your actual bill and any rebate.
Solar Incentives in Tennessee (2026)
TVA's Green Power Providers program pays a below-retail rate for exported solar power. Homeowners should evaluate whether the premium rate over time justifies solar without retail-rate net metering.
- TVA Green Power Providers program
- Tennessee Valley Authority net metering structure
- Property tax exemption on solar (selected counties)
Incentive programs change frequently. Verify current offerings at dsireusa.org or directly with your utility before making any purchasing decision.
How We Calculate Tennessee Solar ROI
These estimates use the same methodology as our interactive solar ROI calculator, applied to Tennessee-specific data:
System cost
$2.95/W installed
LBNL Tracking the Sun 2024
Solar production
1,380 kWh/kW/yr
NREL PVWatts v8
Electricity rate
11.5¢/kWh
EIA Residential Rates 2025
Rate escalation
2.5%/year
EIA Annual Energy Outlook 2024
Panel degradation
0.5%/year
NREL (Jordan & Kurtz, median)
System lifetime
25 years
Standard warranty period
No Section 25D (federal residential solar credit) is included — it expired December 31, 2025. State incentives are not reflected in these pre-computed figures; use the interactive calculator to enter specific rebate amounts.
Calculate With Your Actual Numbers
The figures above use statewide averages. Enter your actual monthly bill, any Tennessee rebate amounts, and your offset target in our interactive calculator for a personalized estimate.
Frequently Asked Questions — Solar in Tennessee
Compare Other States
Estimates are based on NREL PVWatts v8 production data, EIA 2025 electricity rates, and LBNL 2024 installed cost benchmarks. Actual savings vary by roof pitch, shading, utility rate structure, and local permit costs. This is not financial advice. Consult a licensed solar installer before making any purchasing decision.