Solar Panel Cost Guide in St. Peters, MO (2025 Update)
- St. Peters Solar Installation Cost: $17,066
- 25-Year Savings: $16,170
- Payback Period: 14.6 Years
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Average Cost of Solar Panels in St. Peters
See how much it might cost to make the switch to solar in St. Peters.
While the national average of solar panels is $2.66 per watt, solar panels in St. Peters typically cost around 3.Since a 7.2-kW system is needed to cover the energy consumption of a typical home in St. Peters, the average price of going solar will be about $17,066 after claiming the federal solar tax credit of 0.
Remember that the numbers above are only averages. The price you’ll end up paying for solar will differ based on your household energy needs, the type of solar system you want to get, your solar contractor and more.Even with the significant upfront cost, the average St. Peters homeowner can save around $15,000 on their energy bills over 20 years, which is one of the positives of solar.
Click the button below to get connected to a top solar panel company in St. Peters for a customized quote.
Solar savings over time in St. Peters
| Year | Return on Investment |
|---|---|
| 1 years | $-15,776 |
| 3 years | $-13,194 |
| 5 years | $-10,613 |
| 7 years | $-8,032 |
| 9 years | $-5,451 |
| 11 years | $-2,870 |
| 13 years | $-289 |
| 15 years | $2,292 |
| 17 years | $4,874 |
| 19 years | $7,455 |
| 21 years | $10,036 |
| 23 years | $12,617 |
| 25 years | $15,198 |
Top Solar Installers in St. Peters
Many homeowners opt for a solar panel company since installing solar panels yourself can be time-consuming. Plus, warranties and repairs from your solar panel installer can protect your investment and reduce the cost of maintenance over time.
If you're looking for a solar company in St. Peters, we've organized a list of our top suggestions here:
See all of the solar companies in St. Peters
Factors that Affect Solar Panel Costs in St. Peters
For many St. Peters homeowners, the decision to install solar panels comes down to cost. However, the range of solar installation costs can be quite wide in St. Peters, with typical prices between $20,000 to $40,000. There are a number of factors that considerably influence the price you’ll pay, which we'll go over below.
Solar Equipment
The size of the solar panel system you need for your home, which is measured in kilowatts, is the most important cost factor to consider. For every additional kilowatt you need, you can expect your total to increase by about $3,370. The solar equipment you choose can bring your price up or down by thousands or even tens of thousands of dollars. If you choose the most efficient solar panel brands, you’ll end up paying more upfront than if you opted for the most affordable panels. On the other hand, more efficient panels could save you more over time on your energy bills. Additionally, add-on products, like solar batteries, can bump up your total well above the St. Peters average.
Solar Financing Terms
Most solar companies in St. Peters have solar loans, which reduce the initial cost of installing a solar system.You’ll have to consider the long-term cost of loans, including the total interest you’ll pay over the length of the loan. If you’re only able to get a high-interest loan, then your total can be hundreds or even thousands of dollars more than the original cost. Making a larger down payment or finding a solar loan with a low interest rate could reduce your costs significantly.
Solar Panel Installation Company
Finally, the company you get to install your solar panel system can play a role in determining the cost. St. Peters’s solar companies all have different labor costs and add varying upcharges to equipment. Additionally, some companies in St. Peters know more about local solar incentives and can help you take advantage of additional rebates or tax exemptions. Though, they may charge more for that service. Even if they cost more upfront, they could end up saving you more money in the long run.
Solar Panel Cost Data by System Size
| System size | Cost per system watt | Solar system cost | 25-Year savings | Payback period |
|---|---|---|---|---|
| 6 kW | $3.50 | $14,720 | $9,568 | 15.2 years |
| 8 kW | $3.44 | $19,249 | $13,135 | 14.9 years |
| 10 kW | $3.37 | $23,590 | $16,891 | 14.6 years |
| 12 kW | $3.30 | $27,742 | $20,835 | 14.3 years |
| 14 kW | $3.24 | $31,705 | $24,968 | 14.0 years |
| 16 kW | $3.17 | $35,479 | $29,290 | 13.7 years |
| 18 kW | $3.10 | $39,065 | $33,801 | 13.4 years |
| 20 kW | $3.03 | $42,462 | $38,500 | 13.1 years |
How to Save on Solar Panels
Since the brand of solar panels and the installer you choose has an impact on your costs and your system’s durability and efficiency, it’s important to pick the right ones for you. Here are some things to keep in mind to help with your decision:
- Warranty: Each company may offer different types of warranties that provide different kinds of coverage. A 25-year, all-inclusive warranty is the gold standard.
- Installation Process: Get details from your solar installer about the installation process and what to expect, including when the site survey will be completed and what the project timeline is.
- Solar Panel Brands: Homeowners will have different preferences for panels based on their roof configurations and how much efficiency they need. Even though there are many options for which kind of solar panel you can get, not every company will have the exact one you may want or need, so be sure to ask for their list of offerings before deciding.
- Contract: It’s important to read your solar installer’s contract thoroughly to understand what services they will provide, what the warranty covers and what you can expect about the installation process.
EcoWatch's St. Peters, MO Solar Cost FAQs
What is the average cost of installing solar panels in St. Peters?
This is a difficult question to answer exactly, because the cost depends on a few different factors. Generally speaking, it costs about $16,850 for a 5-kW system and $33,700 for a 10-kW system after the ITC is applied. It will be more expensive if you want additional solar equipment or higher quality panels, or if you have higher-than-average energy needs. On the other hand, you can spend less if you opt for a smaller solar panel system or cheaper solar panels.
Are solar panels free in St. Peters?
Solar panels aren’t free in St. Peters, but there are some options that can make getting them more feasible, such as leasing solar panels or getting a solar loan. There may also be local programs or incentives that can help lower the cost.
Do solar panels increase your home value?
Solar panels can increase the value of your home remarkably as long as you buy or finance your panels and don’t opt for a solar lease or power purchase agreement (PPA). According to research done by Zillow, the average home value increases by about 4.1% after installing a solar system."
How often do you have to replace solar panels?
On average, the lifespan of solar panels is about 25 to 30 years. Some even last up to 50 years, but their efficiency goes down by about 0.8% each year. You can choose to replace them sooner if you want to maintain a larger amount of energy production.
Our goal is to reach as many people as we can with sensible solutions like solar energy. Our team of full-time local researchers collects solar price and installation data for every city in America then compiles it to create these digestible city guides. If you want to read our solar expert's opinion on the top solar companies featured here, follow this link.