The cost of solar panels in Saint Peters, MO (2024)

Updated Dec 17, 2024

  • You'll pay an average of $14,050 to install a 5 kilowatt solar panel system in Saint Peters, MO, before incentives.

  • The federal investment tax credit (ITC) lowers that price by 30% of all your solar equipment and installation costs.

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Written by: Emily Walker

As of December 2024, the average solar panel system costs $2.81/W including installation in Saint Peters, MO. For a 5 kW installation, this comes out to about $14,050 before incentives, though prices range from $11,942 to $16,158. After the federal tax credit, the average price drops by 30%.

Average price of a 5 kW solar panel installation in Saint Peters, MO

Good Price
$11,942 or less
Market Average
$14,050
High Price
$16,158 or more

You'll probably pay even less than what we show here. It doesn't include the federal ITC or Saint Peters, MO state incentives, which will lower this price by at least a few thousand dollars.

Your solar panel cost depends on your system's size

It may seem obvious but larger solar panel systems cost more money. We use cost per watt ($/W) so you can easily compare quotes, controlling for slight variations in system size.

While a 5 kW system will only cost you $14,050 in Saint Peters, MO, doubling the system size effectively doubles the price, so you'll pay about twice that for a 10 kW system. The higher the price tag, though, the more you'll get back as a credit towards your federal tax bill.

Average solar cost by system size in Saint Peters, MO

System Size
System Cost
System Cost (after ITC)
3 kW$8,430$5,901
4 kW$11,240$7,868
5 kW$14,050$9,835
6 kW$16,860$11,802
7 kW$19,670$13,769
8 kW$22,480$15,736
9 kW$25,290$17,703
10 kW$28,100$19,670

Are solar panels worth it in Saint Peters, MO?

Solar panels are worth it in most areas, including Saint Peters, MO. Certain factors, including the cost of electricity, incentives, climate, and the angle at which the sun hits your roof impact how quickly you break even on your investment relative to other areas around the U.S. 

If you pay for your system with cash, you'll save about $30,821 over 25 years (the warranty term of most solar panels) on electricity costs with a 5 kW system in Saint Peters, MO. We generate this estimate based on real solar quote data from our Marketplace. It considers your system's cost, the federal tax credit, and inflation rates.

Payback Period
11.56 Years
25-Year Savings
$30,821
Cost-per-Watt
$2.81

If you can't shell out $14,050 in cash to pay for solar, don't sweat it. You can choose to finance your system with a loan instead. Some companies even offer $0-down loans so you can start saving on day one if your loan payments are less than your current electric bills. Just keep in mind that your long-term savings will be lower with a loan due to interest rates.

Find out what solar panels cost in your area in 2024
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The numbers we're showing are averages. The price you'll pay for solar depends on many factors unique to you and your home:

If you're looking for solar companies in MO, here are some popular suggestions:

  • SunSent Solar
    St.Charles, MO
    Established 2016
    Elite Installer
    Switch to sunshine with SunSent Solar:

    - Guaranteed Production: We promise your system will produce what we predic...
    Elite Installer
    Screened & Verified
    5.0 /5.0
    60 Reviews

    Switch to sunshine with SunSent Solar:

    - Guaranteed Production: We promise your system will produce what we predic...
  • Freedom Solar Pros
    Multi-state
    Established 2011
    Elite Installer
    Our main focus is always on quality, both with equipment used and the installation performed. We offer the best w...
    Elite Installer
    Screened & Verified
    5.0 /5.0
    3 Reviews

    Our main focus is always on quality, both with equipment used and the installation performed. We offer the best w...
  • Solar City STL
    St. Louis, MO
    Established 2021
    Elite Installer
    Solar City STL is a local, family owned company that has tailored the way we do business to get you the most ince...
    Elite Installer
    Screened & Verified
    4.5 /5.0
    8 Reviews

    Solar City STL is a local, family owned company that has tailored the way we do business to get you the most ince...
  • GRID LLC
    Multi-state
    Established 2021
    Approved Installer
    Solar is our passion at GRID. We educate customers so they feel empowered to make smart decisions regarding what ...
    Approved Installer
    Screened & Verified
    5.0 /5.0
    4 Reviews

    Solar is our passion at GRID. We educate customers so they feel empowered to make smart decisions regarding what ...
  • EnergyONE Renewables
    Wentzville, MO
    Established 2013
    Approved Installer
    EnergyONE Renewables offers customers the ability to explore all of their solar options from the comfort of their...
    Approved Installer
    Screened & Verified
    5.0 /5.0
    20 Reviews

    EnergyONE Renewables offers customers the ability to explore all of their solar options from the comfort of their...

Solar is a major purchase, but you can get the price tag to come down a bit by being an educated shopper. Taking advantage of incentives and rebates and shopping around for quotes can bring down your cost of solar in Saint Peters, MO.

Take advantage of federal and local solar incentives

As long as your federal tax bill is high enough, you can take advantage of the federal tax credit in Saint Peters, MO. This incentive allows you to apply 30% of your solar installation and equipment costs toward your federal tax bill. If the amount exceeds your tax bill, you can roll over the remaining credit to the following year. Many states also offer great local incentives and rebates.

Get quotes from multiple installers

Comparing multiple solar quotes can save you money through competition and transparency. Each additional quote you receive for solar will help you find the right solar panel system at the right price.

This is where EnergySage can help. With funding from the Department of Energy’s SunShot Prize, EnergySage opened the country’s first (and now the largest) marketplace for home solar panel installations. We gather custom solar quotes from local installers on your behalf and put them in an easy-to-compare format. When you compare quotes for solar panels on the EnergySage Marketplace, you can expect to see prices up to 20% lower than if you work with a single solar company.

Why shop with EnergySage?

Save time & money

Request free quotes from vetted installers in minutes

Unbiased support

Our expert Energy Advisors will help you make the right decision

Trusted, local installers

We pre-screen and monitor all of our partners

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