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Best 5 Solar Companies in Thornton, IL

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Written By Max Peterson | Last Updated: February 05, 2024

Thornton homeowners are intentional about preserving its natural resources and living greener lifestyles. That includes embracing alternative energy sources like solar. With all the options to choose from in this vibrant community, you might feel overwhelmed searching for a top-notch provider. On this page, we'll showcase Thornton's premier solar contractors and share valuable advice for your solar journey.

Best High-Efficiency System
  • Builds custom, high-efficiency solar systems suited to each home
  • Extensive coverage area throughout the country
  • Offers energy storage and EV charger add-ons
Most Reputable
  • Offers high-efficiency panels and storage options
  • Provides unique in-house financing options
  • Recognized as one of the most reputable solar companies
Best Solar Panel Leasing
  • Provides system monitoring
  • Offers diverse financing options for various budgets
  • Provides EV and solar battery solutions

Top Thornton Solar Companies

Ailey Solar Electric, Inc. Logo

Ailey Solar Electric

Based on 38 customer reviews.

Services Offered

Consultation Panel Installation


  • Free quotes
  • Clear pricing policy
  • Reliable customer support
1965 W Pershing Rd, Chicago, IL 773-492-1294 aileysolar.com
FreeWorld Solar Logo

FreeWorld Solar

Based on 38 customer reviews.

Services Offered

Consultation Battery Storage Permit Assistance Skilled Repairs Financing Assistance Panel Installation


  • Free quotes
  • Clear pricing policy
  • Informative resources
1212 N Ashland Ave 2nd Floor, Chicago, IL 312-585-7761 freeworldrenewables.com
WindSoleil Solar and Wind Energy Services Logo

WindSoleil Solar and Wind Energy Services

Based on 42 customer reviews.

Services Offered

Grid-Tied Solar System Off-Grid Solar Systems Battery Storage Panel Installation


  • Reliable customer support
  • Informative resources
  • Clear pricing policy
401 N Trumbull Ave # D, Chicago, IL 224-307-4057 windsoleil.com
RxSun Logo


Based on 78 customer reviews.

Services Offered

Consultation Financing Assistance Panel Installation Cleaning And Maintenance Battery Storage Permit Assistance


  • Clear pricing policy
  • Reliable customer support
  • Informative resources
2211 N Elston Ave Suite 208, Chicago, IL 800-607-9786 rxsun.com

More Local Solar Companies

Illinois Solar Express, LLC

User Reviews: 4.7/5 

1 Mid America Plaza 3rd Floor
Oakbrook Terrace, IL 60181

JD Pro Electric Inc

User Reviews: 4.7/5 

9230 Grand Ave
Franklin Park, IL 60131

Solar Power Midwest LLC

User Reviews: 4.2/5 

103 Frances St
Lockport, IL 60441

Atlas Solar Advisors

User Reviews: 4.7/5 

3152 W Devon Ave STE 2D
Chicago, IL 60659

Unity Solar Group

User Reviews: 4.1/5 

1111 W 22nd St ste 240b
Oak Brook, IL 60523

Windfree Solar Co

User Reviews: 4.4/5 

5022 W Foster Ave
Chicago, IL 60630

Reficiency Solar

User Reviews: 4.6/5 

4513 Lincoln Ave # 110
Lisle, IL 60532

Summit Solar

User Reviews: 4.4/5 

2108 McDonough St
Joliet, IL 60436

Kapital Electric, Inc.

User Reviews: 5/5 

1270 Mark St
Bensenville, IL 60106

To share feedback or ask a question about this article, send a note to our Reviews Team at reviewsteam@thisoldhousereviews.com.

Ranking Methodology

Our team used the following criteria to determine the best Thornton solar companies.

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Facts about Thornton
Average Max Temp: 57°F
Solar Payback Period: 13.8 years
Average Daily Sunlight: 53%
Homes Powered by Solar: 356
Average Annual Energy Bill: $1,156
Solar Power per Capita Percentile: 48.0%

Expert Tips By

This Old House empowers homeowners with the knowledge and tools they need to tackle various projects and navigate the complexities of homeownership.

Benefits of Solar Energy

Solar energy provides multiple perks. Here are some highlights.

  • Lower utility costs: Sourcing some or all of your own electricity will spend less on electricity long-term.
  • Reduced carbon footprint: The sun is one of the universe's most abundant clean energy sources, meaning you can lower or beat your home's dependence on non-renewable sources.
  • Better energy independence: Solar energy can keep your home powered through blackouts and emergencies, giving you additional security. You can use your solar energy anytime with an optional battery backup system.

What Solar Incentives Are Available to Thornton Homeowners?

Illinois' public agencies and power companies offer a variety of solar incentives to help reduce your solar system costs. Check out a breakdown of relevant solar programs where you live.

Incentive Type: Property Tax Incentive

Incentive Amount:


Incentive Type: Rebate Program

Website: comed.com

Incentive Amount:

Air Purifier: $50
Clothes Washer: $50
Dehumidifier: $50
Electric Clothes Dryer: $50
Freezer: $50
Refrigerator: $50
Room Air Conditioner: $25

Refrigerator/Freezer Recycling: Free pickup and $50, plus an additional $10 if recycling a room A/C at the same time
Heating & Cooling
Air Source Heat Pump: $400 - $600
Central A/C: $300 - $600
Ductless Mini-Split Heat Pump: $400
Geothermal Heat Pump: Up to $6,000/home
Furnace Blower Motor (ECM): $50 - $100
Advanced Power Strip: $10
Air Sealing: Up to $400/home
Attic Insulation: Up to $300/home
Duct Sealing: Up to $500/home
Lighting: In-store discounts, varies
Pool Pump: $275
Smart Thermostat: $100
Wall Insulation: Up to $400/home

Incentive Type: Solar Renewable Energy Credit Program

Website: icc.illinois.gov

Incentive Amount:

Negotiated with procurement administrators

Incentive Type: Personal Tax Credit

Website: ecowatch.com

Incentive Amount:

30% federal tax credit for systems placed in service after 12/31/2021 and before 01/01/2033. Good for: solar water heat, solar photovoltaics, biomass, geothermal heat pumps, wind (small), fuel cells using renewable fuels.

How To Choose the Best Solar Company in Thornton

The cost and performance of solar panels often hinge on which company installed them. Consider all of these aspects in your service provider search.

Licensing and Training

In Illinois, the state Commerce Commission licenses distributed generation energy contractors, including solar installers. Look for private accreditations from the North American Board of Certified Energy Practitioners (NABCEP), among the solar sector's most credible trade groups. Its program includes certifications for both solar photovoltaic and water heating installers.

Cost of Solar Panels in Thornton

Your solar modules' type will influence how much power you can generate. Monocrystalline panels perform the best but cost the most. Polycrystalline panels offer you a budget panel with a traditional design, but at the cost of less power generation. Thin-film panels have a low cost and are excellent for non-traditional roofs, but aren't recommended for large home installations.

You can also add electric car (EV) chargers and battery backup systems. These will increase your total project price, but they can boost your solar system's efficiency. Not every solar provider provides these optional components, so look for a contractor that installs them if it's crucial for you.

Generally speaking, it will cost about $18,800 for a five-kilowatt solar array in Thornton. This table shows more specific costs for different solar panel types and system components in your area.

Solar Panel Cost Average Cost
Solar Monocrystalline $1,198
Solar Polycrystalline $935
Thin-Film $546
Solar Battery $767
Solar Home EV Charger $2,876

Financing Solar Energy in Thornton

Choosing the optimal financing solution will affect your overall solar system cost and potential savings. Common payment options include loans, leases, power purchase agreements, and cash payments. Most solar experts recommend a cash payment or using a solar loan. Cash payments demand a large up-front sum, but they help you avoid paying interest, grant you system ownership, and qualify you for cost-saving incentives. Solar loans have the same benefits, though you'll pay more in total due to interest and fees. Similar to an auto or home loan, you'll pay a set monthly rate with potentially $0 down. Solar leases involve paying a set monthly rate to use rooftop panels. A PPA (Power Purchase Agreement) lets you pay a monthly rate determined by the energy you use, as with an electric bill. We usually don’t recommend these two options because you won't own the solar system and are disqualified from using solar incentives. We suggest working with a provider that offers multiple financing options. Speak with each salesperson about what's available, and get more than one estimate for the best odds of keeping within your spending limits.

The table below lists the average payback periods for different capacities of solar systems in Thornton.

You are eligible for a 26% federal tax credit for new solar energy equipment until the year 2032. Municipal and state governments and utility companies might also offer rebates, discounts, and specialized financing options that could save you more.

Solar System Capacity Estimated Payback period
1 kW 2.8 years
2 kW 5.5 years
5 kW 13.8 years
10 kW 27.6 years

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Frequently Asked Questions About Solar in Thornton

How much energy and money could I save per year by switching to solar?

Most Thornton homeowners spend about $1,156 on energy each year. Your costs could drop by $707.72 for each kilowatt you generate after you pay off a solar array.

Is solar energy common in Thornton?

Yes, solar energy is spreading quickly in Thornton. Some homes already use solar power on-site or through utility grids, and they're backed by a state solar economy with 5513 workers and counting.

Should I anticipate a boost in my property value after switching to solar energy?

Yes, solar energy systems will raise your property value. According to the National Renewable Energy Laboratory, for every dollar you reduce on energy bills, your home value rises by $20. So, if your panels save you $600 per year on energy costs, your property could appreciate $12,000.

What if I live in a heavily-wooded or dark

Even if your property has high tree cover, you could still use solar energy. Your provider will optimize your system's performance by selecting the proper site for panels, installing a battery backup system, positioning them to capture the most sunlight throughout the year, and cleaning them regularly. This way, you can store solar power and utilize it as necessary.

What can I do to predict my home's solar viability?

One common way to determine your home's solar viability is by using PVWatts. This powerful free tool considers panel efficiency, system size, tree cover, and local weather and topography to determine how much electricity your array could generate. However, it's not a substitute for consulting with a local solar installation company, who can build a full estimate with the most updated data.

What size should my new Thornton solar system be?

A typical Thornton solar home has a 6.4-kW panel array, but you might need a smaller system if your energy needs are higher. Solar experts will consider your property's power usage and roof shading to determine the right system for you.

How many estimates should I get before making a final solar company decision?

It's wise to collect at least three different estimates before committing to a single solar company. This lets you evaluate product quality, customer feedback, warranty options, and pricing. It also helps you gauge a provider's knowledge, reliability and responsiveness, all of which are positive signs.

To share feedback or ask a question about this article, send a note to our Reviews Team at reviewsteam@thisoldhousereviews.com.