Illinois Solar Installation Contractors

US POWER Solar & Roofing

📍 Los Angeles, CA

US Power Solar and Roofing is a solar and roofing consultancy headquartered in Encino, California, serving homeowners and businesses across nine states including California, Texas, Florida, Pennsylvania, Illinois, Connecticut, New Jersey, Massachusetts, and New York. The company installs factory-direct Qcells solar panels backed by a 25-year performance warranty, offering both residential and commercial solar installations. For each customer, quotes are built around their state's specific net metering programs, tax incentives, and utility rates rather than national averages. Their solar services also include battery storage systems and EV chargers. On the roofing side, US Power offers residential and commercial roofing installations, new roof installation, and roof replacements, with a 10-year zero-leak guarantee on commercial projects. They additionally offer integrated commercial roofing and solar solutions for businesses. US Power operates as a brokerage and project management firm, working with leading solar manufacturers, and has been trusted by over 10,000 homeowners. Flexible financing options, a solar calculator for estimating energy usage, and bilingual service in English and Spanish are available to customers.

AKA Solar LLC

📍 Saint Charles, MO

AKA Solar USA is a solar installation company serving homeowners and businesses across Missouri, Florida, and Southern Illinois, with a focus on the St. Louis region. The company provides both residential and commercial solar panel installation services, with a mission to help clients reduce energy bills and achieve greater energy independence. AKA Solar's team of Solar Specialists guides customers through every stage of the process, from initial consultation to completed installation, addressing questions along the way. The company highlights several benefits of solar adoption for its clients: reduced reliance on the electrical grid, significantly lower energy costs through self-generated electricity, zero greenhouse gas emissions for a smaller environmental footprint, increased property value, and access to federal and state government incentives that can lower upfront installation costs. AKA Solar emphasizes building strong customer relationships and empowering clients to make well-informed decisions about transitioning to renewable energy. Prospective customers can request a free quote through the company's website or reach the sales team directly at [email protected].

Jenkins Solar Systems

📍 South San Francisco, CA

Logic Solar

📍 Overland Park, KS

Logic Solar is a solar energy company based in Overland Park, Kansas, serving residential and commercial customers across Kansas, Missouri, Texas, Oklahoma, Illinois, and Colorado. The company offers rooftop solar installation, battery backup systems, and commercial solar projects, along with guidance on available solar incentives and financing options that include $0-down programs through partners such as Sungage Financial and EnFin. Logic Solar holds Tesla Energy certification and is BBB Accredited. The company works with panel manufacturers including Silfab Solar and Qcells, and uses Enphase and FranklinWH equipment for battery storage. Racking systems come from IronRidge and SunModo. All systems carry a 25-year warranty. According to the company's website, installation teams are led by certified master electricians, and systems are custom-engineered for each roof. Logic Solar reports a 4.9/5 customer rating and states it has completed installations for more than 1,000 homeowners. A customer portal (Logic Portal) is available for system monitoring. Free quotes are offered through their website or by phone.

Solar Energy Solutions

📍 Louisville, KY

Solar Energy Solutions is a solar installation company serving Louisville, Kentucky, along with locations across Illinois, Indiana, Ohio, and Virginia. They work with a broad range of customers, including residential homeowners, for-profit businesses, non-profit organizations (schools, institutions, and government entities), and agricultural operations. On the residential side, they offer solar panel installation along with financing options and ongoing service and maintenance. For businesses, they provide commercial solar systems with access to financing and incentive programs, including utility-scale installations. Agricultural clients can also access solar installations paired with relevant financing and incentive guidance. In terms of technology, Solar Energy Solutions installs solar panels, battery storage systems, Tesla Powerwall 3, Tesla Solar Roof, and solar EV charging equipment. Their service footprint in Kentucky includes both Louisville and Lexington. They publish educational resources including a blog, getting started guides, FAQ, and storm preparedness guidance for Powerwall owners. Case studies are available on their website for prospective customers researching their options. They can be reached by phone at (866) 783-9458 or through an online quote request form.

Solar Energy Solutions

📍 Lexington, KY

Solar Energy Solutions (SES) is a multi-state solar installation company serving residential, commercial, agricultural, and nonprofit customers in Lexington, Kentucky and surrounding regions. The company installs solar panel systems for homeowners and offers residential financing information to help customers navigate incentives. On the commercial side, SES works with for-profit businesses, utility-scale projects, schools, institutions, government agencies, and nonprofit organizations, and provides guidance on commercial solar financing and incentives. Agricultural customers are also served, with dedicated information on agriculture-specific incentives and financing options. In addition to panel installations, SES offers solar battery storage solutions, Tesla Powerwall 3 systems, Tesla Solar Roof installations, and solar EV charging setups. The company provides ongoing service and maintenance for existing solar systems. Beyond Kentucky, SES operates in Illinois, Indiana, Ohio, and Virginia. Their website includes case studies, a resource library, a blog, and an FAQ section. SES holds certifications listed on their site and can be reached at (866) 977-8925 or through an online quote request form. Lexington residents and businesses looking for solar installation can contact SES directly to discuss system options across their full range of residential, commercial, and technology offerings.

GenPro Energy Solutions

📍 Piedmont, SD

GenPro Energy Solutions, based in Piedmont, South Dakota, is a commercial-scale solar contractor offering end-to-end EPC (engineering, procurement, and construction) services for solar projects across the country. The company manages every phase of a solar installation, including feasibility studies, site evaluation, system design, civil and mechanical groundwork, electrical installation, procurement of components, and final commissioning. They also develop battery storage and microgrid systems designed to improve energy resilience and efficiency. GenPro serves a range of institutional and commercial clients, including agricultural operations, municipalities, utilities, commercial and industrial businesses, educational institutions and non-profits, real estate developers, and tribal governments. Their project portfolio includes work such as the Long Meadow Dairy solar installation, the Norfolk Community Solar project, and the City of Schuyler Phase III Solar project. The company provides tax credit guidance as part of its project development process and participates in the Illinois Shines program. GenPro operates with a national footprint, offering an interactive project map on its website to showcase completed work. Clients can reach them at (866) 593-0777 or through their online contact form.

Nelnet Renewable Energy

📍 Lincoln, NE

Nelnet Renewable Energy, headquartered in Lincoln, Nebraska, provided commercial and industrial (C&I) solar solutions along with engineering, procurement, and construction (EPC) services across multiple states, including Nebraska, Colorado, Indiana, Iowa, Illinois, Missouri, and Wisconsin. The company has since been acquired by MARS Energy Group, a national provider of commercial and utility-scale solar and EPC services. New commercial and industrial customers are now directed to MARS Energy Group for solar solutions, while Nelnet continues to support a defined set of legacy programs for existing customers during the transition. Residential and C&I customers in Illinois, Missouri, and Wisconsin can access service and support through the MARS website. For existing commercial solar customers in Nebraska, workmanship warranty support has been transferred to Nebraska Solar Providers, a state-based partner. Separately, Nelnet's tax equity and co-investment division remains active, managing over $313 million in tax equity across its own portfolio and co-investment partnerships. This team focuses on identifying and funding CleanTech and ClimateTech opportunities, with financing and co-investment platforms administered through parent company Nelnet, Inc. The company emphasizes reliability, transparency, and long-term performance as it transitions commercial solar operations to MARS Energy Group while maintaining continuity of support for current customers.

BKJ Solar

📍 Florissant, MO

BKJ Solar is a NABCEP-certified solar installation company serving residential, commercial, and agricultural customers in the St. Louis, Missouri area and across Illinois. Based in Hazelwood, Missouri, the company offers three distinct service categories: residential solar, commercial solar, and farm land solar arrays. With more than 10 years in business and over 30 years of combined team experience, BKJ Solar provides free estimates and backs its work with warranties of up to 30 years on labor and up to 25 years on equipment, using equipment sourced from top solar brands. The company positions itself as a local St. Louis business dedicated to quality first-time installations. Skilled technicians handle all aspects of solar panel installation regardless of the size of the home, business, or agricultural property. BKJ Solar is available Monday through Saturday from 9:00 a.m. to 7:00 p.m. and can be reached by phone at (314) 899-5527 or by email at [email protected]. Free estimates are available through their website for anyone interested in exploring solar options.

Sun Solar

📍 Springfield, MO

Sun Solar is a Springfield, Missouri-based solar company offering residential and commercial solar installation services across Missouri, Kansas, and Illinois. The company has been voted the number one residential solar installer in Missouri and provides in-house installation and financing, eliminating the need for third-party lenders or subcontractors. For homeowners, Sun Solar offers rooftop solar systems, battery backup solutions including Tesla Powerwall 3 integration through a limited battery pilot program, and Tesla Solar Roof installations. A solar calculator on their website helps prospective customers estimate costs and savings before committing. Commercial solar solutions are also available for businesses looking to reduce energy expenses. Sun Solar emphasizes long-term financial benefits including lower utility bills and reduced grid dependence, as well as practical advantages like emergency preparedness through battery storage. The company serves customers connected to a range of Missouri and Illinois utility providers, including Ameren Missouri, Ameren Illinois, Evergy, Springfield City Utilities, and several electric cooperatives. Free quotes are available through their website.

Freedom Forever.

📍 Sandy, UT

Freedom Forever is a large-scale residential solar installation company with a location in Sandy, Utah, serving customers across more than 30 states nationwide. The company claims to be the number-one solar installer in the nation and sets itself apart through a 25-year production guarantee that goes beyond standard equipment warranties. Under this guarantee, if a customer's solar system generates less energy than Freedom Forever projected at the time of installation, the company issues a check to cover the difference in lost savings — covering guaranteed power output and returned lost savings over the full guarantee period. The company targets homeowners seeking to lower utility bills and gain greater control over their energy costs. Customer stories on the site highlight outcomes such as reduced monthly bills and the ability to produce energy at home. Freedom Forever offers free quotes to prospective customers, who can submit their address and state to receive a customized estimate. A customer portal allows existing clients to manage their systems, and a Volt mobile app is available for ongoing monitoring. The company also maintains a learning center with educational resources about going solar and publishes content through social media channels including Facebook, Instagram, YouTube, and a podcast on Spotify.

CTEC Solar, LLC

📍 Bloomfield, CT

CTEC Solar, LLC is a solar and energy storage developer, EPC contractor, and operations and maintenance provider headquartered in New England, with offices in Bloomfield, Connecticut. Founded in 2011, the company operates three distinct business units — Development, EPC, and O&M — each serving specialized segments of the renewable energy market, including utilities, solar developers, and commercial property owners. Its project portfolio ranges from commercial rooftop installations to utility-scale solar plants, including solar-plus-storage systems. CTEC Solar originated in Massachusetts and Connecticut before expanding operations to the Mid-Atlantic, South, and Midwest. The company manages the full project development lifecycle in-house: siting, design, engineering, interconnection, permitting, procurement, financing, construction, and ongoing asset management. Its O&M division provides maintenance and repair services for both distributed generation and utility-scale assets, regardless of which contractor originally built the system. The company also maintains in-house expertise in energy storage design, marketing, and optimization. CTEC Solar is privately owned and describes itself as product-agnostic, allowing flexibility in equipment selection. Its team includes electricians, installers, engineers, and business development professionals. The company engages in community partnerships in areas where its projects are sited, including local hiring initiatives, donations, and sponsorships.