Top Solar Installation Companies in Louisville
2.Southern Solar & Electrical Contracting LLC
4.9★ (38 reviews)
4.9★ from 38 reviews
5.Earthtamers Solar
6.American Roofing Solar
Solar Installation Cost in Louisville
Local ranges, adjusted for area wage and cost-of-living data.
| Service | Typical range in Louisville |
|---|---|
| 6 kW system, installed | $14,326–$19,760/job |
| 8 kW system, installed | $19,068–$26,380/job |
| 10 kW system, installed | $23,811–$32,999/job |
Solar Installation prices in Louisville run about 1% below the national average, based on what this trade earns in the metro area — so neighbouring cities in the same metro see similar rates.
Quotes on this page come from 6 companies serving Louisville, rated 4.9★ on average across 185 customer reviews.
Louisville Climate & Seasonal Timing
What Louisville's weather means for scheduling solar installation.
- Last spring frost
- April 2
- First fall frost
- November 3
- Annual precipitation
- 44.91"
- Heating degree days
- 4,097
- Cooling degree days
- 1,614
| Month | Low | High | Precip |
|---|---|---|---|
| Jan | 26.8° | 43° | 3.24" |
| Feb | 29.9° | 47.8° | 3.18" |
| Mar | 37.8° | 57.9° | 4.17" |
| Apr | 47.3° | 68.8° | 4.01" |
| May | 57° | 77.1° | 5.27" |
| Jun | 66° | 85.3° | 3.79" |
| Jul | 69.9° | 88.7° | 4.23" |
| Aug | 68.5° | 88.3° | 3.33" |
| Sep | 60.5° | 81.5° | 3.05" |
| Oct | 48.9° | 70.1° | 3.22" |
| Nov | 39.5° | 57.9° | 3.59" |
| Dec | 30° | 45.8° | 3.83" |
NOAA station data 3.31 miles from Louisville.
Permits & Regulations in KY
Permit typically required
- Kentucky licenses electrical contractors, master electricians and electricians through the Department of Housing, Buildings and Construction
- An electrical contractor must employ a licensed master electrician
- Electrical work requires a permit and inspection from the state or a certified local inspector
License required: Kentucky DHBC electrical contractor license
Sources: dhbc.ky.gov
Solar Installation FAQs for Louisville
How much does solar cost in Louisville?
A 6 kW home solar system in Louisville typically runs $14326-$19760 installed, before any incentives.
How many solar installers serve Louisville?
We track 6 solar installation companies serving Louisville.
Is solar installation in Louisville more expensive than average?
Electrical installation labor in Louisville runs about -1.2% versus the national average.
Do I need a permit for solar panels in Louisville, KY?
In KY, Kentucky licenses electrical contractors, master electricians and electricians through the Department of Housing, Buildings and Construction. Rooftop solar in Louisville needs a building and electrical permit plus a utility interconnection agreement.
Is there a federal solar tax credit in 2026?
No for homeowners buying a system: the residential federal credit ended December 31, 2025, so a Louisville quote of $14326-$19760 is close to the out-of-pocket cost unless a state or utility rebate applies.
How much does air conditioning drive solar savings in Louisville?
Louisville sees about 1,614 cooling degree days a year; the more air conditioning a home runs, the more of a solar systems output it uses directly.
How many quotes should I get for solar in Louisville?
At least three; with 6 installers serving Louisville, compare the price per watt, panel and inverter models, and the workmanship warranty.
Does heat reduce solar output in Louisville?
Slightly; panels lose efficiency on days near 89F, so Louisville quotes should use temperature-adjusted production estimates.
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