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10 Best Solar Companies in Alton, IL

More than 130 people have received a free quote in the last 60 days.

Last Updated: February 25, 2025

Year after year, more Alton residents adopt rooftop solar panels to lower their carbon footprint and add value to their property. Transitioning to solar energy can lower your monthly energy expenses and decrease your carbon output. Before you begin the process, you want to make sure you find a trustworthy installer. That’s why we’ve reviewed the options and assembled a guide to the most dependable solar Installers in Alton. These top installers consistently deliver high-quality and reliable services.

Advertisement This site receives compensation from some of the companies featured in this listing, which may impact where and how products appear. When you click "Get Quote," you will be connected with partners who may contact you with information related to your inquiry. This listing doesn't feature all companies, products, or offers that may be available.

Top 10 Best Solar Companies in Alton

Advertisement This site receives compensation from some of the companies featured in this listing, which may impact where and how products appear. When you click "Get Quote," you will be connected with partners who may contact you with information related to your inquiry. This listing doesn't feature all companies, products, or offers that may be available.

SunSent Solar

SunSent Solar Logo

Our Rating

User Rating

1710 Scherer Pkwy, St Charles, MO 63303 (636) 757-3083 sunsent.com

Reliable customer support

Clear pricing policy

Free quotes

Informative resources

Services Offered

Financing assistance
Battery storage
Panel installation
Cleaning and maintenance
Consultation
Skilled repairs

Sustainable Solar

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Our Rating

User Rating

16226 Veterans Memorial Pkwy, Wright City, MO 63390 (636) 489-2700 sustainablesolarllc.com

Informative resources

Free quotes

Reliable customer support

Clear pricing policy

Services Offered

Panel installation
Grid-tied solar system
Skilled repairs
Battery storage
Permit assistance
Financing assistance
System decommissioning
Off-grid solar systems

Helio Solar Power, LLC.

Helio Solar Power, LLC. Logo

Our Rating

User Rating

119 S Main St, St Charles, MO 63301 (888) 424-3546 heliosolarpower.com

Free quotes

Reliable customer support

Clear pricing policy

Informative resources

Prompt service delivery

Services Offered

Financing assistance
Solar carports
Panel installation
Cleaning and maintenance
Skilled repairs
Battery storage

Astrawatt Solar

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Our Rating

User Rating

222 S Meramec Ave Suite 202-1100, St. Louis, MO 63105 (877) 937-4786 astrawatt.solar

Reliable customer support

Informative resources

Free quotes

Clear pricing policy

Services Offered

Permit assistance
Panel installation
Consultation
Tesla powerwall
Battery storage

StraightUp Solar of St. Louis

StraightUp Solar of St. Louis Logo

Our Rating

User Rating

11696 Lilburn Park Rd, St. Louis, MO 63146 (314) 218-2663 straightupsolar.com

Informative resources

Clear pricing policy

Free quotes

Services Offered

Battery storage
Panel installation
Consultation
Cleaning and maintenance
Financing assistance
Grid-tied solar system

EFS Energy

EFS Energy Logo

Our Rating

User Rating

1283 Research Blvd, St. Louis, MO 63132 (314) 771-5131 efsenergy.com

Clear pricing policy

Reliable customer support

Informative resources

Services Offered

Panel installation
Cleaning and maintenance
Consultation
Financing assistance

Solar city stl

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Our Rating

User Rating

3636 S Geyer Rd #100, St. Louis, MO 63127 (636) 515-4895 solarcitystl.com

Reliable customer support

Informative resources

Free quotes

Services Offered

Financing assistance
Permit assistance
Panel installation
Cleaning and maintenance
Consultation
Battery storage

Route 66 Solar

Route 66 Solar Logo

Our Rating

User Rating

2110 Troy Rd Suite B1, Edwardsville, IL 62025 (618) 900-1280 route66solar.com

Free quotes

Clear pricing policy

Informative resources

Services Offered

Grid-tied solar system
System decommissioning
Panel installation
Financing assistance

Purelight Power of St. Louis

Purelight Power of St. Louis Logo

Our Rating

User Rating

12747 Olive Blvd Suite 302, St. Louis, MO 63141 (314) 582-6129 purelightpower.com

Informative resources

Reliable customer support

Free quotes

Clear pricing policy

Services Offered

Permit assistance
Consultation
Financing assistance
Grid-tied solar system
Panel installation

Solar Luxury LLC

Solar Luxury LLC Logo

Our Rating

User Rating

11252 Midland Blvd Apt 106, St. Louis, MO 63114 (314) 337-7071 solarluxurystl.com

Free quotes

Reliable customer support

Services Offered

Off-grid solar systems
Consultation
System decommissioning
Panel installation
Skilled repairs
Today's Homeowner Ranking Methodology

Today's Homeowner looks at dozens of datapoints on solar companies to come up with our data-driven rankings. It's not possible for a company to pay for preferential treatment in our rankings. We look at the following key factors in determining who should top our list:

  • Company Experience
  • Real User Reviews
  • Company Reputation
  • Accreditations and Licenses
  • Service Area
  • Customer Service
Have questions about our methodology or company ratings? Reach out to FindAPro@TodaysHomeowner.com.

How To Choose a Solar Company

Installing solar panels can reduce your electricity costs and help the environment by reducing your carbon footprint. When evaluating if a solar provider is a good fit for you, consider these key factors.

Check Licensing

It's imperative that your solar installer has the proper licensing. This help guarantee that the work is done properly using current best installation practices. In Illinois, the state Commerce Commission licenses distributed generation energy contractors, including solar installers.

Read Customer Reviews

Check consumer review platforms like TrustPilot, the Better Business Bureau (BBB), and Google Reviews to see feedback from past customers about local solar companies. Detailed reviews can help you evaluate a company's reliability and customer service. Use caution with installers that have very few reviews or mostly negative ones.

Compare Multiple Quotes

Get free, detailed quotes from 3–5 solar companies. A quote should describe all costs and identify the solar parts included. Looking at several quotes can help you find the option that best fits your budget.

Ask About the Warranty

Quality solar installations should come with comprehensive workmanship and performance warranties. The workmanship warranty covers any installation issues such as poor wiring, poor alignment, or cracks in the panels. The performance warranty ensures a specific energy output level. Strong warranties indicate that a solar installer has faith in its installations.

Evaluate Financing and Incentives

Switching to solar power can help decrease your energy expenses over time. Be sure to consider these aspects when judging the cost and value of solar panels.

  • Compare system purchase options: Solar panels can be purchased upfront or financed over time through a lease or loan. Confirm all terms when financing, such as payment schedule, fees, annual percentage rate (APR), and ownership implications.
  • Look into utility rebates: More discounts might be available from local power companies looking to motivate homeowners to go solar. Contact your local utility provider to learn rebate values and eligibility rules, so you can determine your possible savings.
  • Research federal and state tax credits: There’s a 26% federal tax credit available for the full cost of solar systems until 2032. Many states also offer incentives. The credits can add up to significant savings for solar buyers.

Cost of Solar Installation in Alton

Alton homeowners typically spend about $16,101 on home solar systems after federal tax refunds. Solar arrays in Alton cost roughly $3,760 per kilowatt, with an average size of 6.1 kilowatts. A personalized estimate from a local solar provider will include costs for preliminary work, labor, and permit fees, and will account for your system's size, capacity, and panel type. Some homeowners prefer to lease their solar panels in order to reduce upfront costs.

Alton Solar Incentives Guide

Incentive Type: Property Tax Incentive

Incentive Amount:

Varies

Incentive Type: Solar Renewable Energy Credit Program

Website: icc.illinois.gov

Incentive Amount:

Negotiated with procurement administrators

Incentive Type: Rebate Program

Website: powermoves.com

Incentive Amount:

Dual Fuel Heat Pump: $500
Variable Speed Pool Pump: $250
Air-Source Heat Pump: $250 - $750
Geothermal Heat Pump: $1,500
Heat Pump Water Heater: $400/unit
HVAC: Varies depending on ZIP code. See program website

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.

Frequently Asked Questions About Solar in Alton, IL

Generally speaking, a solar photovoltaic (PV) system can be used to power any household appliance or system that uses electricity. In the smallest case, you can use a solar water heating system.

With home solar energy, you can save money on your energy bill, lower your property's emissions, and be better prepared if there's an outage to the local grid.

Absolutely. Alton uses a balanced mixture of solar energy and conventional power sources. While your panels at home will save you money and lower your home's individual emissions, you'll still benefit from access to the local grid.

Generally speaking, your energy bills will decrease significantly after you install solar panels. This is because you're using the energy you generate for free rather than buying it from your power company. In Alton, the average amount someone can save is $989 per year. With net metering programs offered by many utilities, you could ultimately make a profit from your system once the payback period passes.

Your payback period is the time to earn a net profit from your solar panels. It will vary based on the average sunlight in your area, the rate your utility charges per kilowatt of power, and their rated capacity. Alton gets quite a bit of sunlight per day, so an average payback period could last up to 16.3 years per 5 kW of capacity.

When it comes to taxes, the federal government offers a tax credit of up to 30% of the panels' cost. Depending on where you live, you could also claim or apply for state or property tax incentives. As for insurance, your monthly premium may be slightly higher because solar panels increase your property's value. You should speak with your accountant or insurance agent for information specific to your case.

Solar energy is on par with other forms of renewable energy. They have low maintenance costs and today's systems can stand up to the worst conditions.

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