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5 Best solar companies in Alton, IL (2022 ranking)

UPDATED NOVEMBER 2022

There are plenty of solar companies out there – check out this updated ranking for the top rated solar installers in Alton, IL based on shopper preferences. Compare customer ratings, company tiers, and genuine customer feedback to see which installer is the best fit for your solar project.

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The data on this page comes from real solar quotes to real solar shoppers on the EnergySage Marketplace. We give you access to transparent information so you can confidently make informed energy decisions. Learn more about how our Marketplace works and how we make money.

18 companies
339 customer reviews
5.0 average rating

Solar companies in Alton, IL 2022

  • Chicago, IL
    Elite Installer
    We've been installing solar systems across the country since 2012, many of our customers were large and small businesses, corporations, and municipalities across the United States. In 2018, we recognized a surge in residential solar interest and a need for installers that could offer an economical, educational, and professional solar exp…
    Elite EnergySage badge

    Elite Installer

    Screened & Verified

    We've been installing solar systems across the country since 2012, many of our customers were large and small businesses, corporations, and municipalities across the United States. In 2018, we recognized a surge in residential solar interest and a need for installers that could offer an economical, educational, and professional solar exp…
  • Multi-state
    Elite Installer
    Here at Contemporary Solar we’re family owned and operated with over 50 years of experience combined. The owners are from St. Louis, they grew up working for their late father’s and uncle’s contracting company until they unfortunately passed years back, in doing so they learned from an early age the value of a dollar and hard work. S…
    Elite EnergySage badge

    Elite Installer

    Screened & Verified

    Here at Contemporary Solar we’re family owned and operated with over 50 years of experience combined. The owners are from St. Louis, they grew up working for their late father’s and uncle’s contracting company until they unfortunately passed years back, in doing so they learned from an early age the value of a dollar and hard work. S…
  • Lena, IL
    Established 2017
    Elite Installer
    Stateline Solar is your local expert solar panel installation, maintenance, and repair company in Lena, IL and aims to make solar energy a common source of green energy among all Midwest homes. With over 400 satisfied customers and $2,000,000 + in SRECs awarded, Stateline Solar is a leading solar installation company in NW Illinois.
    Elite EnergySage badge

    Elite Installer

    Screened & Verified

    Stateline Solar is your local expert solar panel installation, maintenance, and repair company in Lena, IL and aims to make solar energy a common source of green energy among all Midwest homes. With over 400 satisfied customers and $2,000,000 + in SRECs awarded, Stateline Solar is a leading solar installation company in NW Illinois.
  • Schaumburg, IL
    Established 2017
    Elite Installer
    PlugPV is your connection to the sun! We started our company as installers for the national solar companies, and now we sell what we install. PlugPV has over a decade of sales and installation experience and are the preferred installer for a number of national solar energy companies. Every installation is inspected by a 3rd Party Insp…
    Elite EnergySage badge

    Elite Installer

    Screened & Verified

    PlugPV is your connection to the sun! We started our company as installers for the national solar companies, and now we sell what we install. PlugPV has over a decade of sales and installation experience and are the preferred installer for a number of national solar energy companies. Every installation is inspected by a 3rd Party Insp…
  • Joliet, IL
    Established 2012
    Elite Installer
    Accelerate Solar sold its install assets to Titan Solar Power in 2020 and the former Owner/CEO, Xavier Veille, has partnered with them as Sunshine Saves Inc. to bring the same level of honest, accurate, and affordable residential solar energy. Titan Solar Power's exclusive partnership with GoodLeap allows for us to offer unique financing…
    Elite EnergySage badge

    Elite Installer

    Screened & Verified

    Accelerate Solar sold its install assets to Titan Solar Power in 2020 and the former Owner/CEO, Xavier Veille, has partnered with them as Sunshine Saves Inc. to bring the same level of honest, accurate, and affordable residential solar energy. Titan Solar Power's exclusive partnership with GoodLeap allows for us to offer unique financing…
  • Bethalto, IL
    Established 2015
    Advanced Installer
    Based in St. Petersburg, FL, we have been selling and installing solar since 2015. We service the state of Florida and Illinois. Excel Home Solar is dedicated to educating Floridians on the benefits of solar energy, as well as energy efficiency and savings measures for their home.
    Advanced EnergySage badge

    Advanced Installer

    Screened & Verified

    Based in St. Petersburg, FL, we have been selling and installing solar since 2015. We service the state of Florida and Illinois. Excel Home Solar is dedicated to educating Floridians on the benefits of solar energy, as well as energy efficiency and savings measures for their home.
  • Mokena, IL
    Established 2009
    Elite Installer
    YellowLite is a renewable energy company specializing in residential and commercial solar installations. Our team specializes in grid-connected, stand-alone, and hybrid photo voltaic systems. With the help of our professional NABCEP-certified engineers, we can reliably predict the return on your green energy investments and make customiz…
    Elite EnergySage badge

    Elite Installer

    Screened & Verified

    YellowLite is a renewable energy company specializing in residential and commercial solar installations. Our team specializes in grid-connected, stand-alone, and hybrid photo voltaic systems. With the help of our professional NABCEP-certified engineers, we can reliably predict the return on your green energy investments and make customiz…
  • Chicago, IL
    Established 2007
    Advanced Installer
    Ailey Solar is a solar and home battery system designer and installer serving the entire Chicagoland area. We are committed to amazing customer service, quality design and installation, and affordable solar and battery power. We provide quick and easy consultations so you can find out how simple and affordable solar can be for you or yo…
    Advanced EnergySage badge

    Advanced Installer

    Screened & Verified

    Ailey Solar is a solar and home battery system designer and installer serving the entire Chicagoland area. We are committed to amazing customer service, quality design and installation, and affordable solar and battery power. We provide quick and easy consultations so you can find out how simple and affordable solar can be for you or yo…
  • Chicago, IL
    Established 2009
    Approved Installer
    Windfree Solar provides custom solar project consulting and installation across the Midwest. Since our establishment in 2009, we have installed over 22 Megawatts of solar and wind renewable energy system covering homes, businesses, schools, and municipalities. At Windfree, we have a great deal of experience with a variety of projects, in…
    Approved EnergySage badge

    Approved Installer

    Screened & Verified

    Windfree Solar provides custom solar project consulting and installation across the Midwest. Since our establishment in 2009, we have installed over 22 Megawatts of solar and wind renewable energy system covering homes, businesses, schools, and municipalities. At Windfree, we have a great deal of experience with a variety of projects, in…
  • Mokena, IL
    Established 20
    Approved Installer
    We are a very dynamic, efficient, and evolving company. The world is transforming in more ways than one. At Leading Solar Solutions, we know that clean,affordable solar energy is fast becoming an important piece of our worldwide energy mix. and we are commmited to leading the transformation. We operate sustainably, responsibly, and effe…
    Approved EnergySage badge

    Approved Installer

    Screened & Verified

    We are a very dynamic, efficient, and evolving company. The world is transforming in more ways than one. At Leading Solar Solutions, we know that clean,affordable solar energy is fast becoming an important piece of our worldwide energy mix. and we are commmited to leading the transformation. We operate sustainably, responsibly, and effe…
  • Rockford, IL
    Approved Installer
    Approved EnergySage badge

    Approved Installer

    Screened & Verified

  • Skokie, IL
    Established 2010
    Approved Installer
    93Energy Solar is proud to offer Illinois residents and businesses the freedom and flexibility to choose how they buy power. While like all solar companies in IL we started in 2018, Renovations Delivered, the parent company of 93Energy, has been in business since 2010 with warehousing and operations strategically located throughout t…
    Approved EnergySage badge

    Approved Installer

    Screened & Verified

    93Energy Solar is proud to offer Illinois residents and businesses the freedom and flexibility to choose how they buy power. While like all solar companies in IL we started in 2018, Renovations Delivered, the parent company of 93Energy, has been in business since 2010 with warehousing and operations strategically located throughout t…
  • Quincy, IL
    Established 2016
    Approved Installer
    Sunspot Solar LLC, has been consulting homeowners and business owners on solar power since 2016. We assist homeowners and business owners in West Central Illinois, North East Missouri and North Texas. We believe that renewable energy should be accessible to everyone and with the help of our local partners we're making that happen for som…
    Approved EnergySage badge

    Approved Installer

    Screened & Verified

    Sunspot Solar LLC, has been consulting homeowners and business owners on solar power since 2016. We assist homeowners and business owners in West Central Illinois, North East Missouri and North Texas. We believe that renewable energy should be accessible to everyone and with the help of our local partners we're making that happen for som…
  • Freeport, IL
    Approved Installer
    We are a woman owned, union electrical contractor offering superior electrical service in Northern Illinois. All of our team members receive ongoing training to ensure solar systems are safely installed and perform as expected. We strive to offer best-in-class service from the first contact through the life of your system. Bella Power…
    Approved EnergySage badge

    Approved Installer

    Screened & Verified

    We are a woman owned, union electrical contractor offering superior electrical service in Northern Illinois. All of our team members receive ongoing training to ensure solar systems are safely installed and perform as expected. We strive to offer best-in-class service from the first contact through the life of your system. Bella Power…
  • Lisle, IL
    Established 2018
    Approved Installer
    (OPEN DURING COVID-19) Reficiency Solar is a solar installer in the Chicago Suburbs that focuses on residential solar design and build services. Our full in house team of sales, design, install, and service has a solution for all of your energy needs.
    Approved EnergySage badge

    Approved Installer

    Screened & Verified

    (OPEN DURING COVID-19) Reficiency Solar is a solar installer in the Chicago Suburbs that focuses on residential solar design and build services. Our full in house team of sales, design, install, and service has a solution for all of your energy needs.
  • Chicago, IL
    Approved Installer
    FreeWorld is a mission-driven developer of residential solar projects. FreeWorld helps homeowners gain independence over their energy costs and generate long-term savings with solar. FreeWorld recycles a portion of all earnings into charitable community solar installations in areas devastated by climate-disaster. Ask about our …
    Approved EnergySage badge

    Approved Installer

    Screened & Verified

    FreeWorld is a mission-driven developer of residential solar projects. FreeWorld helps homeowners gain independence over their energy costs and generate long-term savings with solar. FreeWorld recycles a portion of all earnings into charitable community solar installations in areas devastated by climate-disaster. Ask about our …
  • South Holland, IL
    Established 2018
    Approved Installer
    Solar Panels Installation, Battery & Generator Back-up, EV Charging Stations, Tree Removable or Trimming, and Roof Replacement.
    Approved EnergySage badge

    Approved Installer

    Screened & Verified

    Solar Panels Installation, Battery & Generator Back-up, EV Charging Stations, Tree Removable or Trimming, and Roof Replacement.
  • Multi-state
    Elite Installer
    As the Nation’s leading Rooftop Solar Contractor, Titan Solar Power handles all aspects of a solar module installation and has various “no upfront cost” options to fit your family’s specific needs, including financial products that are exclusive to only Titan by the largest solar financiers in the nation.  We take pride in our work an…
    Elite EnergySage badge

    Elite Installer

    Screened & Verified

    As the Nation’s leading Rooftop Solar Contractor, Titan Solar Power handles all aspects of a solar module installation and has various “no upfront cost” options to fit your family’s specific needs, including financial products that are exclusive to only Titan by the largest solar financiers in the nation.  We take pride in our work an…

See the cost of solar in Alton, IL

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How we determine the best solar companies in Alton, IL

At EnergySage, we care about connecting solar shoppers to high-quality solar companies. As such, any solar installers we list above are active on the EnergySage Marketplace in Alton, IL and are pre-screened by our team.

What does it mean to be “pre-screened”? We evaluate every solar installer to ensure that they’ll provide quality service to EnergySage users. These high-quality installers are approved based on their years of experience, licensing and insurance, reputation, and certifications. When bringing new installers into the EnergySage Marketplace, here’s how we ensure our partners are the best of the best:

  • At least three years of experience installing solar
  • Licensed and insured for solar installations
  • NABCEP certified
  • Reputation for excellent customer service and quality solar installations
  • Installs high quality solar equipment

Our rating tiers

Choosing the right installer can be difficult, especially when you’re deciding between multiple top-notch companies on EnergySage. To make it easier, we created a unique rating system that evaluates our partners’ performance based on real data from our Marketplace.

Elite+ installers are the most experienced, chosen, and celebrated companies on the Marketplace, having provided exceptional service to a high volume of shoppers for at least a year.

Elite installers earn top ratings from customers, endorsements from vendors, and win customers more frequently than their peers.

Advanced installers are among the top half of companies on the Marketplace for responsiveness, reputation, results.

Approved installers passed our rigorous screening criteria for experience, licensing, and positive reviews.

How to pick the best solar installer

When you’ve already narrowed down your options to reputable installers and are trying to decide which quote to move forward with, here are three final considerations that distinguish the best from the rest:

workmanship warranties for solar panels

Workmanship warranties

What is covered and for how long?

In the unlikely event there’s an issue with your solar panel system, it’s important to know who to call if something goes wrong. There are multiple warranties that come with your solar energy system, from manufacturer warranties for different components to workmanship warranties from your installer.

The workmanship warranty is specific to the work the installer performs, and is typically somewhere between one and 10 years. Be sure to check with your installer to see what’s included in the warranty, if there are any exclusions, and if there’s any cost to you in the event they have to come out and check on or replace some equipment.

house with solar installers and solar panels

The use of sub-contractors

Which crew will install your system?

In some instances, solar installers will rely on subcontractors to perform some, or all, of the work included during your solar installation. Don’t let this put you off: it’s entirely standard procedure in the industry. What is alarming, though, is a lack of transparency from installers about who will install your system and why they use subcontractors.

When you’ve narrowed down your list of potential solar installers, be sure to ask who will install the system–their own crew or subcontractors–and, if they use subs, ask why they do, what portion of the install the subcontractors will complete, and what oversight the company you purchase your system from has over the subcontractors. At the end of the day, the most important question is who will stand behind the quality of your installation.

solar company reviews on a computer

Expertise

How does each installer tailor their system to your needs?

Beyond ensuring that your solar installer has all of the appropriate licenses and industry-specific certifications, it’s important to work with a solar installer who has experience custom designing systems to fit their customers’ needs.

When you’re comparing your options, the best installers will work with you to understand your needs, as well as how solar fits your overall energy plans. Make sure your solar installer provides a consultative, professional solar experience.

By doing the legwork for you, EnergySage makes it easy to find reputable solar installation companies in Alton, IL. We’ve already vetted all of our installer partners, and keep a close watch over their performance to ensure their installations and customer satisfaction are up to the levels that you–and we–expect. Start receiving quotes from reputable installers in your area by creating a free account on the EnergySage Marketplace today.

As of December 2022, the average solar panel cost in Alton is $2.99/W. Given a solar panel system size of 5 kilowatts (kW), an average solar installation in Alton ranges in cost from $12,708 to $17,192, with the average gross price for solar in Alton coming in at $14,950. After accounting for the 30% federal investment tax credit (ITC) and other state and local solar incentives, the net price you'll pay for solar can fall by thousands of dollars.

According to solar shoppers on the EnergySage Marketplace, the top five solar installers in Alton are:

There are 18 solar companies in Alton on the EnergySage Marketplace.
On average, solar shoppers in Alton save $49,502 over the course of 20 years. Shoppers who connect with a solar installer in Alton on the EnergySage Marketplace have a solar payback period of 4.88 years.