US residential solar · 2026 data

Solar Panels in Tennessee

Q: "Does Tennessee have net metering?"

"Tennessee does not have traditional net metering. Instead, TVA operates the Green Power Providers (GPP) program, which pays solar homeowners a fixed generation rate — currently around 3 cents per kilowatt-hour — for all electricity their system produces. This is separate from, and substantially lower than, the 11.8-cent retail rate residents pay for consumption. The structure makes self-consumption the primary driver of solar savings in Tennessee."

Q: "What is the TVA Green Power Providers program?"

"TVA's Green Power Providers (GPP) program is the mechanism through which Tennessee residential solar owners sell electricity to their local power company. Unlike net metering, it pays a fixed rate — approximately 3 cents per kWh in 2024 — for all solar generation rather than crediting excess at the retail rate. The program has a 50 kW residential cap and is available through most TVA-affiliated local power companies, though some have waitlists due to TVA's 5% capacity limit per distributor."

Q: "Is solar worth it in Tennessee given the low export rate?"

"Solar can still make sense in Tennessee for households with high daytime electricity use. After the 30% federal tax credit, a typical 8-kilowatt system costs around $16,000–$19,000 net. Households with 60–80% self-consumption rates can see payback periods of 11–14 years, within the 25-year panel warranty life. The economics are strongest for remote workers, retirees, or anyone who can shift loads like EV charging and laundry to daytime hours."

Q: "What solar incentives are available in Tennessee?"

"The main incentives are the 30% federal Investment Tax Credit, Tennessee's sales tax exemption on solar equipment (saving roughly $1,400 on a $20,000 system), and a property tax exemption that prevents your assessed value from rising after installation. There is no state income tax credit for solar in Tennessee. Some local power companies offer rebates of $500–$1,000; check with your specific LPC before purchasing to confirm current availability."

Q: "How big a solar system should I install in Tennessee?"

"Because exported power earns only about 3 cents per kilowatt-hour under TVA's GPP program, oversizing your system makes little financial sense. Size your panels to match your daytime electricity consumption — typically 40–60% of total household use — rather than your total annual consumption. For most Tennessee homes, this means a 5–9 kilowatt system. Adding battery storage is often a better investment than extra panels if you need evening coverage. *Data sources: U.S. Energy Information Administration (EIA) Electric Power Monthly 2024; NREL PVWatts Calculator v8; Solar Energy Industries Association (SEIA) Solar Market Insight 2023–2024; Tennessee Valley Authority Green Power Providers program documentation 2024; IRS Publication 946 and Inflation Reduction Act Section 48 guidance 2024.*"

SAVE

$0+

Over 25 Years

$18,900 Cost after ITC

18.6 yrs Payback

9.0 kW Typical system

Most homeowners need:

21–25 panels typical
9.0 kW average system
$18,900 after tax credits
18.6 year payback

✓ Updated monthly ✓ NREL data ✓ Reviewed by solar experts ✓ IRS tax credit included

Updated June 9, 2026 · 10 min read ·By Mark Sullivan ·Reviewed by Green Energy Calculators Editorial Team

Calculate My Savings View Tennessee Solar Data

Without solar vs with solar

25-year cost comparison for a $300/month US electric bill.

Without solar

25-year utility cost

$42,900

Rates rise ~3% per year (EIA avg.)

With solar

Net system cost

$18,900

After 30% federal ITC

Your savings

Difference

+$24,000

Estimated lifetime advantage

Author Mark Sullivan

Reviewed by Green Energy Calculators Editorial Team

Last updated Jun 9, 2026

Sizing formula kW = Annual kWh ÷ (Peak Sun Hours × 365 × 0.82)

Tennessee generates less than 1% of its electricity from solar — one of the lowest shares of any state east of the Mississippi — yet residential solar installations grew 34% in 2023 alone, according to SEIA data. That gap between potential and reality has a lot to do with a policy quirk that surprises nearly every homeowner who starts getting quotes: Tennessee does not have traditional net metering. What it has instead is the TVA Green Power Providers program, and understanding how it actually pays you is the single most important thing you can do before signing a solar contract in this state.

The Tennessee Valley Authority serves roughly 10 million people across Tennessee and parts of six neighboring states. As the federally owned utility behind virtually all of the state’s electric service — delivered through roughly 153 local power companies — TVA sets the rules for how distributed solar generation gets compensated. Those rules look very different from what you’ll find in North Carolina, Virginia, or most other southeastern states.

The good news is that solar still makes financial sense for many Tennessee households. Average retail electricity rates in the state sit around 11.8 cents per kilowatt-hour, according to EIA 2024 figures — lower than the national average of about 16 cents — but system costs have fallen sharply enough that payback periods under 12 years are achievable for well-sited rooftops. The key is going in with accurate expectations rather than assumptions borrowed from states with more solar-friendly policy.

How TVA’s Green Power Providers Program Actually Works

Traditional net metering — the kind that exists in states like California or New York — credits you for excess solar at roughly the same retail rate you pay for electricity you consume. Every kilowatt-hour your panels push to the grid offsets a kilowatt-hour you’d otherwise buy. It’s a dollar-for-dollar exchange that makes solar math relatively straightforward.

TVA’s Green Power Providers (GPP) program works differently. Rather than netting kilowatt-hours against each other, the program pays you a fixed rate for all the solar electricity your system produces — and separately charges you the full retail rate for all the electricity you consume. As of 2024, TVA’s generation payment rate under GPP is approximately 3 cents per kilowatt-hour for new enrollees, though local power companies may add small supplements. That 3-cent rate compares to the 11.8-cent retail rate you pay for consumption. The gap is substantial and changes nearly every financial calculation you’d make for a Tennessee solar installation.

What this means in practice: a 7-kilowatt system in Nashville producing around 9,000 kilowatt-hours per year might earn you roughly $270 in generation payments annually. Meanwhile, self-consumption savings — electricity your panels make that you use before it hits the grid — remain valuable at the full retail rate. This is why system sizing strategy in Tennessee differs so sharply from other states. Using as much solar power as you produce, during the hours you produce it, becomes far more financially important than exporting surplus to the grid. Running your dishwasher, EV charger, or HVAC system during peak solar hours effectively values that power at 11.8 cents rather than 3 cents — nearly four times more valuable.

GPP also has a capacity limit: TVA caps the program at 5% of each local power company’s peak demand, and some distributors have waiting lists. Before purchasing a system, confirm your local power company (LPC) still has GPP capacity. System size is also capped at 50 kilowatts for residential installations, which is far more than any household needs, but worth knowing before you sign a contract. Most reputable installers will check GPP availability as part of the quoting process; if yours doesn’t mention it, ask directly.

What Tennessee Solar Incentives Actually Exist

State-level solar policy in Tennessee is thin compared to most states with active solar markets. There is no state income tax credit for solar installations, no mandatory renewable portfolio standard, and no competitive bidding program that drives installer prices down through volume. What does exist is meaningful, but it requires knowing where to look rather than assuming you’ll get the same package of incentives available in higher-profile solar states.

The federal Investment Tax Credit (ITC) remains the most powerful incentive available to Tennessee homeowners. Under the Inflation Reduction Act, you can claim 30% of your total system cost — panels, inverter, labor, and electrical upgrades — as a direct credit against your federal income tax liability. On a $25,000 system, that’s a $7,500 reduction in what you owe the IRS. The credit applies to installations through at least 2032 at the 30% rate. Use our solar tax credit calculator to see exactly what the ITC means for your specific tax situation, since households with lower tax liability may need to carry the credit across multiple years. The foundation of any ROI calculation is How Much Do Solar Panels Cost in 2026? Complete US.

Tennessee offers a sales tax exemption on solar equipment — panels and related hardware are exempt from the state’s 7% sales tax, saving roughly $1,400 on a typical $20,000 system. This exemption has been in place since 2017 and applies automatically at purchase; no paperwork required. Tennessee also exempts the added value of a solar installation from property tax assessment, meaning your home’s taxable value doesn’t increase when you add panels — a benefit worth hundreds of dollars annually in property taxes depending on your county rate.

Some local power companies run their own small incentive programs. Memphis Light, Gas and Water and a handful of TVA distributors have offered periodic rebates ranging from $500 to $1,000, though availability varies year to year. TVA’s own EnergyRight program occasionally offers financing products for efficiency upgrades that can be paired with solar. For homeowners pairing storage with solar, battery systems installed alongside panels also qualify for the 30% federal ITC — a meaningful shift from pre-IRA rules where standalone storage didn’t qualify.

Realistic Payback Periods for Tennessee Solar Systems

Running honest numbers on Tennessee solar requires accounting for that low GPP export rate rather than assuming standard net metering applies. A typical 8-kilowatt residential system in Memphis or Knoxville costs between $22,000 and $28,000 before incentives. After the 30% federal ITC, your net cost drops to roughly $15,400 to $19,600.

Annual savings depend heavily on self-consumption rate. A household that’s home during the day — retirees, remote workers, households with EVs that charge during daylight — might self-consume 70–80% of their solar production, effectively valuing most of those kilowatt-hours at the retail rate. A household that’s empty during the day might self-consume only 30–40%, exporting the rest at the 3-cent GPP rate. The difference in annual savings between these two scenarios can exceed $400 per year on an 8-kilowatt system.

Using EIA consumption averages for Tennessee (around 1,200 kilowatt-hours per month for a typical household) and NREL’s PVWatts solar irradiance data for the state (approximately 4.8 peak sun hours per day in central Tennessee), an 8-kilowatt system would produce roughly 11,000 kilowatt-hours annually. At a 60% self-consumption rate and current rates, total annual savings land around $900–$1,100 including GPP payments. That puts payback at 14–18 years before accounting for electricity rate escalation — longer than the national average, but still within the 25-year warranty life of most panels. For state-by-state figures, our guide to Solar Panel Payback Period by State shows where solar pays off fastest.

Adding a battery system allows you to store midday solar production and use it in the evening rather than exporting it at 3 cents. For households with evening-heavy loads, pairing a 10–13 kWh battery with your panels can shift self-consumption rates above 75%, meaningfully shortening payback. Electricity rate escalation also matters more in lower-rate states than people expect: Tennessee rates have risen an average of 2.8% annually over the past decade, according to EIA historical data. At that pace, the retail rate you’re saving against grows over a 20-year period, improving long-run returns even if the first few years look modest.

Horizontal bar chart comparing Tennessee solar payback period in years at self-consumption rates from 30% to 80% — **Tennessee solar payback drops sharply as self-consumption rises.** At 80% self-consumption an 8 kW system pays back in roughly 11 years; at 30% self-consumption payback stretches to 19 years — an 8-year gap driven entirely by TVA’s 3-cent export rate versus the 11.8-cent retail rate. Source: NREL PVWatts, EIA 2026.

Solar vs utility company · 25-year comparison

Total cost of staying on the grid vs owning solar for a $300/month bill (national average assumptions).

Total utility payments

$42,900

Total solar cost (after ITC)

$18,900

Net savings

+$24,000

Avg. monthly difference

+$85/mo

See my savings →

How to Size a Solar System Correctly Under TVA’s GPP Rules

Because exported power earns so little under GPP, oversizing a system in Tennessee is a financial mistake rather than just a missed opportunity. In states with true net metering, building a system large enough to cover 110–120% of annual consumption can make sense — excess summer production offsets winter shortfalls at full retail value. In Tennessee, that logic breaks down entirely.

The right approach is to size your system to match your daytime self-consumption as closely as possible, then add only enough additional capacity to cover your base load through battery storage if you want whole-home backup or evening coverage. NREL’s system sizing guidance suggests starting with your daytime electricity consumption — typically 40–60% of total household use — and sizing panels to cover that figure closely rather than total annual usage.

For most Tennessee households, this means a system in the 5–9 kilowatt range rather than the 10–14 kilowatt systems that installers sometimes pitch based on total annual consumption. Getting this right matters financially: a system 40% too large in Tennessee earns perhaps $120 extra in GPP payments annually while adding $6,000–$8,000 to the installation cost. The math rarely favors the larger system. Use the solar system size calculator to find the appropriate size for your home based on your actual usage patterns, local peak sun hours, and panel efficiency.

Roof orientation and tilt also matter more in Tennessee than in states where every kilowatt-hour carries equal value regardless of timing. South-facing roofs at a 25–30 degree pitch maximize midday production — exactly when your self-consumption potential is highest and export is least valuable. East- and west-facing arrays that spread production across more daylight hours can actually improve self-consumption rates for households with some morning and late-afternoon load, even if total annual production is 10–15% lower than an optimal south-facing array. Shading analysis is particularly important in Tennessee, where tree cover is common in older suburban neighborhoods; even partial shading during peak hours can reduce output disproportionately with string inverter systems.

Battery Storage and Time-of-Use Strategies for Tennessee Homeowners

Battery storage plays a different role in Tennessee than it does in states with robust net metering. Where net metering exists, batteries primarily provide backup power and emergency resilience — the financial case is secondary. In Tennessee, batteries serve a direct economic function: they convert low-value exported power into high-value self-consumed power by storing solar generation for use after the sun sets.

A standard 10 kWh battery system installed alongside solar in Tennessee costs between $8,000 and $12,000 before the 30% federal ITC. After the credit, your net cost drops to $5,600–$8,400. That’s a significant addition to an already meaningful investment, but for households with heavy evening loads — families that cook dinner, run laundry, and watch TV between 6 and 10 PM — the battery can shift 2–4 kWh of evening consumption from the grid to stored solar power each day. At 11.8 cents per kilowatt-hour, that represents $86–$172 in additional annual savings from the battery alone, not counting the resilience value during outages.

Georgia and Kentucky homeowners face similarly structured utility compensation programs where self-consumption and storage matter more than export volume, making Tennessee’s situation less unusual than it might appear at first glance. What differs is the scale of TVA’s reach — no other utility in the southeast controls as large a residential solar market under a single compensation structure.

Time-shifting loads doesn’t require a battery in every case. Smart thermostats, EV chargers with scheduled charging, and programmable appliances can shift 15–25% of a household’s daily consumption into daylight hours without any storage investment. Pre-cooling your home between 10 AM and 2 PM when panels are generating at peak output, for instance, reduces the load your HVAC puts on the grid during evening hours. These behavioral and equipment strategies cost little but can move self-consumption rates from 40% to 55–60%, shaving one to two years off payback with no additional hardware. To map out whether solar savings justify your total system investment — panels plus any storage — the solar savings calculator lets you model different self-consumption rates and rate escalation scenarios side by side.

Frequently asked questions

Direct answers for US homeowners in Tennessee.

Does Tennessee have net metering?

Tennessee does not have traditional net metering. Instead, TVA operates the Green Power Providers (GPP) program, which pays solar homeowners a fixed generation rate — currently around 3 cents per kilowatt-hour — for all electricity their system produces. This is separate from, and substantially lower than, the 11.8-cent retail rate residents pay for consumption. The structure makes self-consumption the primary driver of solar savings in Tennessee.

What is the TVA Green Power Providers program?

Is solar worth it in Tennessee given the low export rate?

What solar incentives are available in Tennessee?

How big a solar system should I install in Tennessee?

Tennessee solar by electric bill

See system size and payback for common monthly bills in Tennessee.

$200 $200/month electric bill Panels · cost · payback → $300 $300/month electric bill Panels · cost · payback →

View Tennessee solar data & incentives →

Popular utility companies

Solar rules and net metering vary by utility — not just by state.

TVA / local LPCs Statewide via 153 LPCs Nashville Electric Service Davidson County Memphis Light, Gas & Water Memphis Knoxville Utilities Board Knoxville Middle Tennessee EMC Suburban Nashville Green Power Providers TVA export program

Methodology & data sources

Calculation method: System size uses NREL PVWatts derate factor (0.82). Costs based on SEIA 2026 installed cost ($2.75–$3.20/W). Payback uses net cost after 30% federal ITC (IRC Section 25D). Savings assume full-retail net metering unless noted.

Official sources: EIA state electricity rates · NREL PVWatts · Energy.gov ITC guide · DSIRE incentives · SEIA market data · IRS Publication 5695.

All figures are estimates for educational purposes — not tax, legal, or investment advice. Consult a licensed installer and CPA for your situation.