How much do solar panels cost in Knoxville?
By Our research team · Last verified · Methodology
Most 8 kW solar installs in Knoxville cost $19,700–$31,000 before incentives, for an 8 kW system that makes about 31 kWh on an average day here. The typical Knoxville job is $24,050.
How we get this data- Typical
- $24,050
- Low end
- $16,650
- High end
- $38,650
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Get my fair quote →The typical Knoxville price is $24,050, 7% above the US typical of $22,400.
Knoxville's price band
Knoxville is pricier than 91% of the 195 US metros we price for solar panel work.
Expect $19,700–$31,000 for 8 kW of panels, $23,950–$37,700 for 10 kW, and $12,000–$19,300 more for a Tesla Powerwall 3. Every price here is before incentives, and the federal homeowner credit is gone for 2026 installs.
As a mid-size solar market, Knoxville prices a typical 8 kW system at about $24,050. Tennessee averages about 4.8 peak sun hours a day in NREL data (the US average is about 5). Ask your utility what it pays for the power you send back; that rate, not the panel price, decides how fast solar pays off in Knoxville.
Prices are before incentives. The federal homeowner credit is gone for 2026 installs (it ended for expenditures after December 31, 2025), so any help now comes from your state, your utility or a lease company's own business credit.
Comparing cities, or after the US-wide picture? See the national guide: Solar panel cost in the USA.
$19,700–$31,000 installed in Knoxville for an 8 kW home solar system with standard panels, typically $24,050 with no federal tax credit in 2026. That is about $3,000 per kW. Verified November 2026. Get free Knoxville quotes →
- 8 kW system, installed: $19,700–$31,000 ($24,050 typical, about $3,000 per kW)
- 6 kW: $15,500–$24,350; 10 kW: $23,950–$37,700; premium panels add 10–25%
- Battery added with solar: $9,400–$19,300 for 10–13.5 kWh
- No federal tax credit for systems you own installed after December 31, 2025
- About 31 kWh a day from 8 kW at local sun levels; payback near 19 years at full-rate credits
Prices verified November 2026 · Cross-referenced against 42+ American pricing sources · See methodology
Installed prices before any state or utility incentive, and with no federal credit. Knoxville metro, re-verified November 2026. Battery and inverter hardware is priced nationally, so those lines move less from city to city.
| Service | Low | Typical | High |
|---|---|---|---|
| 8 kW solar system, standard panelsinstalled | $19,700installed | $24,050 | $31,000 |
| 6 kW solar system, standard panelsinstalled | $15,500installed | $18,900 | $24,350 |
| 6 kW solar system, premium panelsinstalled | $17,050installed | $21,750 | $30,500 |
| 8 kW solar system, premium panelsinstalled | $21,700installed | $27,650 | $38,800 |
| 10 kW solar system, standard panelsinstalled | $23,950installed | $29,200 | $37,700 |
| 10 kW solar system, premium panelsinstalled | $26,350installed | $33,600 | $47,150 |
| 12–13 kW solar system for a large homeinstalled | $28,500installed | $35,950 | $47,850 |
| Price per kW, standard panelsper kW | $2,450per kW | $3,000 | $3,850 |
| 5 kWh battery added with solarinstalled | $5,750installed | $7,300 | $8,900 |
| 10–13 kWh battery added with solarinstalled | $9,400installed | $13,550 | $17,750 |
| Tesla Powerwall 3 (13.5 kWh), installedinstalled | $12,000installed | $15,400 | $19,300 |
| Hybrid inverter upgrade (battery-ready)installed | $2,600installed | $3,650 | $5,750 |
| String inverter replacementinstalled | $1,550installed | $2,400 | $3,650 |
| Microinverter replacement, one unit (out of warranty)per unit | $320per unit | $480 | $790 |
| Solar panel cleaning (15–25 panels)per visit | $160per visit | $320 | $540 |
| System health check / inspectionper visit | $160per visit | $270 | $380 |
| Remove and reinstall panels for a re-roof (about 20 panels)per job | $3,750per job | $5,350 | $8,600 |
| Critter guard around the array (8–10 kW)installed | $750installed | $1,300 | $1,850 |
| Main panel upgrade for solar (to 200 amps)installed | $1,600installed | $2,650 | $4,750 |
| Monitoring subscription, where chargedper year | $0per year | $120 | $240 |
| Ground mount instead of roof mount (8 kW)extra | $4,300extra | $7,000 | $10,750 |
| Clay or concrete tile roofextra | $1,050extra | $1,900 | $2,700 |
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Prices verified November 2026 · Cross-referenced against 42+ American pricing sources · See methodology
Prices cover the Knoxville metro and assume a pitched shingle roof in good shape. Older roofs in East Knoxville & Mechanicsville more often need repair first.
Solar panel prices across Knoxville
Same system, four price bands. The spread comes from roof type, access and shade: tighter and older in Downtown & Old City, easier in West Knoxville, Farragut & Oak Ridge.
Downtown & Old City
- 8 kW installed
- $20,900–$33,500 installed
- Typical job
- $16,450–$40,700 / 6–10 kW system
The priciest part of the metro to install in: tight access, older wiring and roofs that may need work first. The panels cost the same; the labor and paperwork do not.
East Knoxville & Mechanicsville
- 8 kW installed
- $20,300–$32,250 installed
- Typical job
- $15,950–$39,200 / 6–10 kW system
Older roofs and older wiring. The system price is standard; the roof repair, panel work and tree trimming decide the final number.
Fort Sanders & UT
- 8 kW installed
- $19,500–$30,400 installed
- Typical job
- $15,350–$36,950 / 6–10 kW system
Smaller, older houses and many rentals. Owners pay standard metro prices, and small roofs often cap the system at 6 kW or less.
West Knoxville, Farragut & Oak Ridge
- 8 kW installed
- $19,300–$31,000 installed
- Typical job
- $15,200–$37,700 / 6–10 kW system
Big roofs and big bills. Larger systems cost less per kW, and this is where most 10–12 kW jobs in the metro are.
Real solar jobs in Knoxville
Here's what common solar panel jobs cost in Knoxville in 2026, installed, before incentives.
Smaller home: 6 kW, standard panels
About 23 kWh on an average day at Tennessee's sun levels. Smaller systems cost more per kW, about $3,150 here against $3,000 for 8 kW.
Typical home: 8 kW, standard panels
About 31 kWh a day and 11,300 kWh a year. $24,050 is the typical Knoxville price for a pitched shingle roof in good shape.
Solar plus a Powerwall 3
An 8 kW system with a 13.5 kWh battery for outages and evening use. Doing both in one job shares the crew, the permit and the utility paperwork.
Big home or EV owner: 10 kW, premium panels
Premium panels make more power per square foot, which helps on small or shaded roofs. Standard panels at 10 kW are $23,950–$37,700.
Re-roof with solar already on it
Taking about 20 panels off and putting them back after the roofers leave, on top of the roof itself. If your roof has less than 10 years left, replace it before solar goes on.
How much do solar panels cost in Knoxville?
Between $19,700 and $31,000 for an 8 kW system, installed, and most Knoxville homeowners pay close to $24,050. Three things set the number: system size, panel brand and the roof. A simple shingle roof with standard panels lands near the low end; premium panels on a steep or tile roof can pass $38,800.
Bigger systems cost less per kW. In Knoxville, 6 kW is about $3,150 per kW, 8 kW about $3,000 and 10 kW about $2,900. Figures re-verified against 42 sources in November 2026.
Solar prices in Knoxville (2026): the lines on a quote
An 8 kW system is $19,700–$31,000 installed, a battery adds $9,400–$19,300, and a panel upgrade adds $1,600–$4,750 if your panel is full.
| Line on the quote | Low | Typical | High |
|---|---|---|---|
| 8 kW system, standard panels | $19,700 | $24,050 | $31,000 |
| 8 kW system, premium panels | $21,700 | $27,650 | $38,800 |
| Tesla Powerwall 3, added at install | $12,000 | $15,400 | $19,300 |
| Main panel upgrade (to 200 amps) | $1,600 | $2,650 | $4,750 |
| Tile roof, extra | $1,050 | $1,900 | $2,700 |
| Ground mount, extra | $4,300 | $7,000 | $10,750 |
| Critter guard | $750 | $1,300 | $1,850 |
| String inverter replacement (later) | $1,550 | $2,400 | $3,650 |
Standard vs premium panels in Knoxville: the gap on 8 kW is about $3,600. Premium panels pay off on small or shaded roofs where you need more power per square foot; on a big sunny roof, standard panels are the better buy.
What moves a solar quote in Knoxville:
- System size — bigger systems cost less per kW: about $3,150 at 6 kW against $2,900 at 10 kW.
- Panel and inverter brand — premium panels run 10–25% more; microinverters cost more than one string inverter but last longer.
- The roof — tile adds $1,050–$2,700, a ground mount $4,300–$10,750, and a worn roof should be replaced first.
- The electrical panel — a full or 100-amp panel can add $1,600–$4,750 for an upgrade.
- Who sells it — sales and marketing are about 15% of a typical price; local installers often quote less than national brands.
Ask every Knoxville installer for the same five things: system size in kW, panel and inverter models, the price per kW, the warranty terms, and what roof, panel and permit work is included. Compare those lines, not the total. Get a quote for your solar install →
Solar Panel Cost in Knoxville by System Size
A 6 kW system is $15,500–$24,350, 8 kW is $19,700–$31,000, and 10 kW is $23,950–$37,700, installed with standard panels, before any state or utility incentive.
Worked example: a Knoxville home using about 940 kWh a month gets an 8 kW system at $24,050. If the panel is 100 amps, add an upgrade at $2,650 for $26,700. Add a Powerwall 3 in the same job and the total is about $41,350.
A larger home with central AC or an EV may need 10–12 kW: $29,200 for 10 kW, or $35,950 for 12–13 kW at typical prices. Premium panels on 10 kW run $26,350–$47,150.
Knoxville Solar Panel Costs by System Size
| System size | Cost | Best for |
|---|---|---|
| 4 kW system — about 15 kWh a day | $11,500–$18,100 installed | Small home or condo; low bills or a small roof |
| 6 kW system — about 23 kWh a day | $15,500–$24,350 installed | Smaller home or modest power use |
| 8 kW system — about 31 kWh a day | $19,700–$31,000 installed | Typical home; about 940 kWh a month of use |
| 10 kW system — about 39 kWh a day | $23,950–$37,700 installed | Larger home, central AC or one EV |
| 12 kW system — about 46 kWh a day | $28,500–$44,900 installed | Big home, pool or electric heat |
| 15 kW system — about 58 kWh a day | $34,400–$54,100 installed | Very large all-electric home or two EVs |
| 8 kW solar + 13.5 kWh battery | $31,100–$49,350 installed | Backup in outages and evening use where exports earn little |
| 13.5 kWh battery only (no solar) | $12,000–$19,300 installed | Backup without panels; shaded roofs |
Hardware vs everything else: where a Knoxville solar quote goes
Panels, inverter, racking and wiring are only about 41% of a typical US solar price. On a $24,050 Knoxville job that is roughly $9,850. Sales and marketing take about 15%, design, paperwork and overhead about 20%, installer profit about 16%, and the install labor itself only about 6%.
That is why the payback math matters more than the panel brand. An 8 kW system here makes about 11,300 kWh a year. At Tennessee's 2024 average of 10.9 cents a kWh across all customers (EIA; home rates usually run higher), that power is worth about $1,250 a year, a simple payback near 19 years. That assumes your utility credits exports at the full rate; lower export credits stretch it, and higher home rates shorten it.
What's included in a Knoxville solar quote (and what costs extra)
A standard quote covers the panels, inverter, racking, wiring, the install crew, permits, inspection and the utility hookup paperwork. The headline price often leaves out:
- Roof work — repairs, or $1,050–$2,700 extra for a tile roof
- Panel upgrade — $1,600–$4,750 if your electrical panel is full or 100 amps
- Critter guard — $750–$1,850 to keep birds and squirrels out from under the panels
- A battery — $9,400–$19,300 for 10–13.5 kWh of storage, if you want backup
Get the warranty terms in writing: panel and inverter years, the workmanship warranty, and who fixes roof leaks around the mounts.
Your local market
Knoxville is a mid-size solar market. The hardware price is national; labor, permits, sales costs and how many installers compete for the job are local.
System size
An 8 kW system is $19,700–$31,000. A 6 kW system is $15,500–$24,350 and 10 kW $23,950–$37,700; the price per kW drops as the system grows.
Panels and inverters
Premium panels add 10–25% ($21,700–$38,800 for 8 kW). Microinverters cost more upfront than one string inverter but usually carry 20–25 year warranties; a string inverter often needs replacing once ($1,550–$3,650).
Your roof
Clay or concrete tile adds $1,050–$2,700, a ground mount $4,300–$10,750. If the roof has less than about 10 years left, re-roof first: removing and reinstalling panels later costs $3,750–$8,600.
Your electrical panel
A full or 100-amp panel is a common surprise. Upgrading to 200 amps adds $1,600–$4,750 in Knoxville, and it is cheapest done with the solar job.
Adding a battery
A 10–13 kWh battery adds $9,400–$17,750, a Tesla Powerwall 3 $12,000–$19,300. Batteries make the most sense where outages are common or exports earn little.
Permits and the utility in Knoxville
Permits and inspections are about 3% of a typical price, and the utility must approve the hookup before you can switch on. Ask who files the paperwork; a good installer does all of it.
- Get three quotes.Same panels, different sales costs. Knoxville quotes for 8 kW run $19,700–$31,000; a second and third bid is the fastest way to find the padding.
- Compare the price per kW.Divide each quote by its size in kW. About $2,450–$3,000 per kW is a good Knoxville price for standard panels; much above $3,850 needs a reason.
- Size it to your bills, not your roof.Use 12 months of bills. A system that makes more than you use only pays off if your utility credits exports well.
- Fix the roof first.Re-roofing under existing panels means paying $3,750–$8,600 to take them off and put them back.
- Bundle the panel and battery work.A panel upgrade ($1,600–$4,750) or a battery done in the same job shares the permit, the inspection and the utility visit.
- Check state and utility help.Ask your utility about rebates and how it credits exports before you sign.
Before you pay a deposit to a Knoxville solar installer, get these in writing:
- System size in kW and the expected output in kWh a year
- Panel and inverter brand and model
- Price per kW and the total before incentives
- Roof work, tile or ground-mount extras, priced as their own lines
- Any panel upgrade, priced as its own line
- Permit, inspection and utility interconnection, and who files them
- Warranties: panels, inverter, workmanship and roof leaks
- Payment schedule, and what happens if the utility hookup is delayed
How much do solar panels cost in Knoxville?
$19,700–$31,000 installed for an 8 kW system, and $24,050 is typical. A 6 kW system is $15,500–$24,350 and 10 kW is $23,950–$37,700, before incentives.
What is the price per kW for solar in Knoxville?
About $3,000 per kW for an 8 kW system with standard panels, within $2,450–$3,850. Smaller systems cost more per kW and larger ones less.
Is there still a federal solar tax credit in Knoxville?
Not for systems you buy. The 30% Residential Clean Energy Credit ended for expenditures made after December 31, 2025, and the IRS treats the expense as made when installation is complete. Lease and PPA companies may still claim a business credit and pass some of it on in their price.
How much does solar with a battery cost in Knoxville?
About $31,100–$49,350 for 8 kW of panels plus a Tesla Powerwall 3. A 10–13 kWh battery from another brand adds $9,400–$17,750 to the solar price.
How long does solar take to pay off in Knoxville?
Roughly 19 years for a typical 8 kW system at Tennessee's 2024 average power price from EIA (10.9 cents a kWh across all customers), with every kWh worth the full price. That assumes your utility credits exports at the full rate; lower export credits stretch it, and higher home rates shorten it.
How much power will an 8 kW system make in Knoxville?
About 31 kWh on an average day, or 11,300 kWh a year, based on about 4.8 peak sun hours a day for Tennessee in NREL data.
Do I need a new electrical panel for solar in Knoxville?
Not always. Many 200-amp panels take solar as they are. A full or 100-amp panel may need an upgrade, about $1,600–$4,750 here.
What does solar panel cleaning and upkeep cost in Knoxville?
Cleaning is $160–$540 a visit and a health check $160–$380. Many roofs never need cleaning; rain does most of it. Budget $1,550–$3,650 for one string inverter replacement over the life of the system.
How much does it cost to remove solar panels for a new roof in Knoxville?
$3,750–$8,600 to take about 20 panels off and put them back, on top of the roof itself.
What permits does solar need in Knoxville?
A building or electrical permit, an inspection, and the utility's approval to connect. Your installer should file all of it; permits and inspections are about 3% of a typical price.
Prices verified November 2026 · Cross-referenced against 42+ American pricing sources · See methodology
Prices for the Knoxville metro area, November 2026. Outer suburbs may vary.
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