15 Best Solar Companies in Union, MO (2025 Reviews)
We analyzed over 1500 solar companies in the nation,
and have selected the top 15 in Union based on:
Customer review scores
Service area for Union, MO
Company policies and services offered
Accreditations and certifications
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Average Union homeowner saves $1,379/year with solar panels
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Best Solar Companies in Union
Do you want energy freedom in Union? Installing solar panels can be a rewarding project since you can take advantage of lots of perks when you go solar. Because of Union's great amount of sunshine on average, there are lots of solar companies to choose from.
To help you navigate through the huge variety of Union solar installers, we’ve narrowed down a list of the top ones.To get an estimate of how much it could cost to put solar panels on your roof, you can click the button below to get a quote from a certified installer near you.
EcoWatch Rankings for Solar Companies in Union

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

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


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

Route 66 Solar
Informative Resources
Clear Pricing Policy
Free Quotes
Limited information available on website
Services Offered
Financing Assistance
Panel Installation
Grid-Tied Solar System
System Decommissioning

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

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

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


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

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



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

five stars electric and solar LLC
Limited information available on website
Services Offered
Panel Installation
Methodology: How We Ranked the Best Solar Companies in Union
EcoWatch's solar experts analyzed each solar company in Union 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 Union
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 Union
The cost of installing a solar panel system has decreased significantly over the past few years, but it’s still a significant investment for most homeowners.The overall price and potential savings vary depending on some key factors such as:
- Average daily sunlight: Since Union gets a decent amount of average daily sunlight, your solar panels can generally produce enough energy to power your whole home, which impacts how much your solar panels can save you on your electricity bills.
- The model of solar panel system you can afford: This is dependent on your income and budget.
- Incentives: Along with the federal Solar Investment Tax Credit (ITC), which lets you receive a tax credit curretnly worth 0 of your overall installation cost, your state or local government may offer additional tax exemptions, credits or rebates that can help you save even more. Excluding incentives, you can save an average of $16,000 over the first 20 years with your solar panels, too.
- Energy consumption: Solar may be an expensive investment for households that don’t consume too much energy each month.
There are many wonderful benefits of solar despite the upfront cost of installation. It can help the environment and your bank account. In addition, it can boost the value of your home, resulting in even more benefits if you choose to sell your home later.
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Adopting green energy can substantially impact both the environment and your bills. To see how much, check out the calculator below. You can also view our solar panel cost guide for Union, MO.
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Solar Incentives in Union
Adopting solar power has a lot of great benefits. Not only can it help protect the Earth, but you can also save a good amount of money on your installation with various government incentives.State and city solar incentives depend on the location and, sometimes, utility company. A lot of states offer rebates for solar power systems, in addition to the federal solar tax credit. You can find out about the incentives available to you in our article on solar incentives
Environmental Impact of Switching to Solar in Union
One of the reasons so many homeowners are considering switching to solar power is to help reduce their environmental impact.But how much can using solar energy instead of traditional energy actually help the environment? Something that can drastically shape your carbon footprint is how long your commute is and how much you drive altogether. If you install solar panels and drive an electric car, you can greatly reduce your carbon dioxide emissions by charging your car at home.Since solar panels don’t release carbon dioxide emissions into the atmosphere when generating electricity, they’re a good swap for traditional energy sources. In fact, you could be looking at reducing your carbon dioxide emissions by about 100 pounds each year. Since energy from the sun is abundant and produces electricity without a carbon footprint, adding solar panels to your home is one easy step you can take to help protect the environment.
EcoWatch's Union, MO Solar Company Rankings FAQs
What is the best solar company in Union?
In Union, Astrawatt Solar is the best local solar company. Our team of experts rates it 5.00 stars, so it's a good choice if you're planning to add solar panels to your house.
What is the negative environmental impact of solar panel manufacturing?
Solar panels can be bad for the environment when manufacturers use toxic chemicals in the construction. Chemicals can make solar panels difficult to recycle safely once they’ve reached the end of their lifespan. Solar panel manufacturing needs a lot of energy as well. The energy payback period is about 1 to 4 years.
Are solar panels worth it?
Solar panels can be a great investment for lots of homeowners, but truthfully, they might not be worth it for everyone. If your home doesn't get a lot of direct sunlight or your power bills are already reasonably low, solar panels might not be for you.
How often do solar panels have to be replaced?
On average, solar panels can last about 25 to 30 years. Some even last up to 50 years, but efficiency decreases 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.