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Solar Installation in St. Louis, MO

Compare 4 local solar installation pros. Typical service: $17705–$24420.

Top Solar Installation Companies in St. Louis

  1. 1.Brda Electric

    4.9★ (154 reviews)

    4.9★ from 154 reviews

    +16362066468Website

  2. 2.ECOcentrix

    5.0★ (60 reviews)

    5.0★ from 60 reviews

    +13142460116Website

  3. 3.American Patriot Solar

    5.0★ (1 reviews)

    5.0★ from 1 reviews

    +13149063333

  4. 4.SolarIsland Energy

    5.0★ (1 reviews)

    5.0★ from 1 reviews

    +13143250834

Solar Installation Cost in St. Louis

Local ranges, adjusted for area wage and cost-of-living data.

ServiceTypical range in St. Louis
6 kW system, installed$17,705–$24,420/job
8 kW system, installed$23,565–$32,601/job
10 kW system, installed$29,426–$40,781/job

Solar Installation prices in St. Louis run about 22% above 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 4 companies serving St. Louis, rated 5.0★ on average across 216 customer reviews.

St. Louis Climate & Seasonal Timing

What St. Louis's weather means for scheduling solar installation.

Last spring frost
April 2
First fall frost
November 4
Annual precipitation
43.03"
Heating degree days
4,471
Cooling degree days
1,678
MonthLowHighPrecip
Jan23.8°39.8°2.45"
Feb27.8°45.1°2.39"
Mar37°55.4°3.36"
Apr47.3°67°4.1"
May57.4°76.8°4.8"
Jun66.7°85.3°4.34"
Jul71°89.1°4.19"
Aug69.7°88.1°3.41"
Sep61.1°80.8°3.38"
Oct49.5°68.9°3.43"
Nov39.3°55.9°4.22"
Dec28.1°42.9°2.96"

NOAA station data 1.45 miles from St. Louis.

Permits & Regulations in MO

Permit typically required

  • Missouri electrical licensing is primarily local, run by cities and counties
  • An optional statewide electrical contractor license must be accepted in lieu of a local contractor license
  • Electrical permits are issued by the local building department

License required: Local electrical license or optional statewide electrical contractor license

Sources: pr.mo.gov

Solar Installation FAQs for St. Louis

How much does solar cost in St. Louis?

A 6 kW home solar system in St. Louis typically runs $17705-$24420 installed, before any incentives.

How many solar installers serve St. Louis?

We track 4 solar installation companies serving St. Louis.

Is solar installation in St. Louis more expensive than average?

Electrical installation labor in St. Louis runs about +22.1% versus the national average.

Do I need a permit for solar panels in St. Louis, MO?

In MO, Missouri electrical licensing is primarily local, run by cities and counties. Rooftop solar in St. Louis 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 St. Louis quote of $17705-$24420 is close to the out-of-pocket cost unless a state or utility rebate applies.

How much does air conditioning drive solar savings in St. Louis?

St. Louis sees about 1,678 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 St. Louis?

At least three; with 4 installers serving St. Louis, compare the price per watt, panel and inverter models, and the workmanship warranty.

Does heat reduce solar output in St. Louis?

Slightly; panels lose efficiency on days near 89F, so St. Louis quotes should use temperature-adjusted production estimates.