14 Best Solar Companies in St. Clair, MO (2025 Reviews)
We analyzed over 1500 solar companies in the nation,
and have selected the top 14 in St. Clair based on:
Customer review scores
Service area for St. Clair, MO
Company policies and services offered
Accreditations and certifications
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Average St. Clair homeowner saves $1,379/year with solar panels
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Best Solar Companies in St. Clair
When deciding on the best solar panel companies, St. Clair homeowners have more providers to choose from than ever before, which can be a lot to consider, but we’re here to make adopting solar power less confusing. Installation costs can be high, but switching to solar will save you money on your power bills over many years. In fact, you can expect to save about $16,000 over 20 years.
The cost of installing solar panels can vary substantially according to your home’s configuration and your overall energy requirements.To receive free quotes from the best solar companies in St. Clair, you can click "get quote" below.
EcoWatch Rankings for Solar Companies in St. Clair

Astrawatt Solar
Free Quotes
Clear Pricing Policy
Reliable Customer Support
Informative Resources
Limited information available on website
Services Offered
Tesla Powerwall
Permit Assistance
Panel Installation
Consultation
Battery Storage


SunSent Solar
Clear Pricing Policy
Informative Resources
Reliable Customer Support
Free Quotes
Limited information available on website
Services Offered
Panel Installation
Skilled Repairs
Financing Assistance
Battery Storage
Cleaning and Maintenance
Consultation

StraightUp Solar of St. Louis
Informative Resources
Free Quotes
Clear Pricing Policy
Limited information available on website
Services Offered
Financing Assistance
Consultation
Battery Storage
Grid-Tied Solar System
Panel Installation
Cleaning and Maintenance

EFS Energy
Clear Pricing Policy
Reliable Customer Support
Informative Resources
Limited information available on website
Services Offered
Consultation
Panel Installation
Cleaning and Maintenance
Financing Assistance

Helio Solar Power, LLC.
Reliable Customer Support
Informative Resources
Clear Pricing Policy
Free Quotes
Prompt Service Delivery
Limited information available on website
Services Offered
Solar Carports
Financing Assistance
Skilled Repairs
Panel Installation
Battery Storage
Cleaning and Maintenance

Solar city stl
Reliable Customer Support
Free Quotes
Informative Resources
Limited information available on website
Services Offered
Consultation
Financing Assistance
Panel Installation
Permit Assistance
Battery Storage
Cleaning and Maintenance


Sustainable Solar
Clear Pricing Policy
Reliable Customer Support
Free Quotes
Informative Resources
Limited information available on website
Services Offered
Permit Assistance
Panel Installation
Skilled Repairs
Grid-Tied Solar System
Off-Grid Solar Systems
Financing Assistance
Battery Storage
System Decommissioning

Solar Luxury LLC
Reliable Customer Support
Free Quotes
Limited information available on website
Services Offered
Skilled Repairs
Off-Grid Solar Systems
Panel Installation
System Decommissioning
Consultation



Purelight Power of St. Louis
Reliable Customer Support
Informative Resources
Clear Pricing Policy
Free Quotes
Limited information available on website
Services Offered
Financing Assistance
Grid-Tied Solar System
Panel Installation
Permit Assistance
Consultation

five stars electric and solar LLC
Limited information available on website
Services Offered
Panel Installation
Methodology: How We Ranked the Best Solar Companies in St. Clair
EcoWatch's solar experts analyzed each solar company in St. Clair based on criteria such as its reputation in the industry, customer reviews, services, warranty coverage and financing. Using this solar methodology, we used the data we collected to rate and rank each company and narrow down our picks for the best solar companies in St. Clair
Below are some the criteria we examined specifically for Missouri solar companies
- Brand reputation and certifications (20%): We take each company's Better Business Bureau (BBB) score into consideration, as well as how long the installer has been in business (at least 5 years is required, 10 preferred) and what type of solar certifications it holds.
- Customer reviews (20%): Trust is a top priority at EcoWatch, so we take customer experience under close consideration. We scour different review sites and customer testimonials when ranking our top solar companies, checking sites such as Trustpilot and Google Reviews. We also consider any potential complaints or lawsuits filed against these companies and award or remove points accordingly.
- Warranty (20%): A company earns a perfect score in this category if it offers 25-year warranties that cover performance, product and workmanship. The industry standard that we measure companies against is 25-year product and performance warranties, along with a 10-year workmanship warranty. We also look closely into the track record of the post-installation support each company provides in terms of honoring its contracts
- Solar services (10%): All of the companies we review install solar panels, but we award companies higher points if they offer additional services for customers, like battery installation, energy-efficiency audits, and EV chargers.
- Pricing and financing (10%): It's hard to get exact quotes for solar projects, but we use marketplace research to determine how each company prices its equipment and installation services. Additionally, companies that offer more help for panel financing — like in-house loans, leases, or PPAs — score higher than those that don't.
- Availability (10%): The bigger the service area, the higher the company will score.
- Transparency and accessibility (5%): Solar installers that offer free consultations and easy contact methods score higher in this category.
- Environmental, social and corporate governance factors (5%): A company earns a perfect score in this category if it offers public data disclosure, addresses end-of-life (EOL) products or processes, and demonstrates a commitment to uplifting the communities that it serves.
The Cost and Benefits of Solar in St. Clair
For many people, the decision of which solar installer to hire comes down to how much it’ll cost.Some key things that impact the cost and possible savings include:
- How much energy you use: If your home needs to use a lot of energy, you'll benefit more from going solar.
- Incentives: The federal solar investment tax credit currently lets you lower your taxes by 0 of the project cost. Your state and even local utility companies may also have various incentives that you can use. Additionally, you can save about $16,000 over 20 years on your utility bills, without incentives.
- The type of solar panels you want: More efficient models are more costly, so that will influence your budget for your solar project.
- How much sunlight your roof gets: If your roof doesn’t get a lot of direct sunlight, your solar system won’t be able to make as much energy, which will leave you with lower savings on energy bills than a roof that gets plenty of sunlight.
There are several good benefits of solar even with the upfront cost of installation. It can help the Earth and your finances. Plus, it can raise the value of your home, leading to even more benefits if you decide to sell your home later.
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Adopting clean energy can substantially impact both the environment and your monthly expenses. To see how much, check out the calculator below. You can also view our solar panel cost guide for St. Clair, MO.
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Solar Incentives in St. Clair
Switching to solar power has many considerable benefits. Not only can it help preserve the Earth, but you can also save a good amount of money on your installation with various government incentives.These incentives normally consist of cash rebates, tax benefits and/or performance-based incentives. They can lower the cost you pay for going solar by 0, upwards of 50% in some cases. You can learn about the incentives you can take advantage of in our article on solar incentives
Environmental Impact of Switching to Solar in St. Clair
If you want to add solar panels to your home, one of the principal reasons why may be to lower your greenhouse gas emissions.Many homeowners might be wondering how much exactly they can impact the environment by switching to solar in St. Clair, though. An important thing to be mindful of is your overall carbon footprint. For example, if your commute is very long, your footprint may be bigger, so switching to solar power for your home can help offset that.After you go solar, your carbon dioxide emissions can be lowered by about 100 pounds a year. For those who want to help the environment, the upfront cost of solar is a small price to pay for reducing your carbon footprint.
EcoWatch's St. Clair, MO Solar Company Rankings FAQs
Which solar panel installer is the best in St. Clair?
The top local solar company in St. Clair is Astrawatt Solar, with a rating of 5.00 stars.
Are solar panels actually good for the environment?
Producing solar panels needs to use chemicals and produces toxic waste that can be bad for the environment, which is the main negative thing about solar panels.
Are solar panels worth it?
Solar panels need a significant upfront investment that will cost you several thousands of dollars, but whether or not solar panels are worth it depends on a range of factors like how much you pay for electricity and the amount of direct sunlight your roof gets.
How much solar panel capacity do I need for my house?
Solar panel capacity is how much energy the panels can create under ideal conditions (a sunny day around noon). The average household has to get between 20 and 35 panels to cover their energy needs.
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.