Illinois residents are seeing energy prices rise steadily, especially during extreme winters and humid summers. That’s why more homeowners across the state — from Chicago to Champaign — are investing in solar energy. With state programs like Illinois Shines and SRECs (Solar Renewable Energy Credits), it’s easier than ever to make the switch. Solar gives you financial savings, energy independence, and long-term peace of mind.
Choosing the right installer matters just as much as choosing to go solar in the first place — the difference between a company that’s licensed, experienced with the Illinois Shines program and net metering rules, and backed by a real workmanship warranty and one that isn’t can add up to thousands of dollars over the life of your system. Below, you’ll find Illinois’s solar companies compared side by side, including which ones have completed EnergyScout’s verification process, so you can start your search with a shorter, more confident list.
EnergyScout tracks local and national solar companies serving homeowners throughout the state. Use the directory below to compare installers based on experience, service area, products, certifications, and other company information.
Companies displaying the EnergyScout Verified badge have completed an additional review process that includes a direct interview, screening customer feedback, and providing evidence of completed installations. Verification provides another layer of information when comparing solar companies, but homeowners should still evaluate multiple installers to find the right fit for their home.
Est. 1999
Est. 2009
Source: Solar Energy Industries Association (SEIA), State By State data, as of January 2026 — seia.org/solar-state-by-state
Illinois Solar Market and Policy Support:
Illinois ranks #10 in residential solar and #5 in commercial solar installations, with over 5,400 MW of total capacity. The state’s Illinois Shines program (part of the Future Energy Jobs Act) has been instrumental in driving solar adoption by providing upfront incentives and ongoing income through Solar Renewable Energy Credits (SRECs). Illinois employs nearly 6,000 solar workers, and the market has matured significantly over the past five years with strong installer networks across Chicagoland, the Metro East, and downstate regions. While Illinois doesn’t receive Arizona-level sunshine, solar panels still perform well throughout the state, with solid production from spring through fall.
SREC Income and Long-Term Economics:
One of Illinois’ strongest solar selling points is the SREC program. For every megawatt-hour of solar energy your system produces, you earn one SREC, which you can sell for additional income beyond your electricity savings. Illinois Shines offers two pathways: upfront rebates (which reduce your installation cost) or the Illinois Adjustable Block Program (which provides ongoing SREC payments over 15 years). Combined with net metering — which allows you to earn bill credits when your system produces excess energy — Illinois delivers strong financial returns despite moderate electricity rates. Most Illinois solar systems pay for themselves within 8-12 years, with decades of free electricity and SREC income following.
Winter Performance and Grid Resilience:
Many Illinois homeowners worry that solar won’t work during long, cloudy winters — but modern solar technology performs well even in overcast conditions, generating power from diffuse sunlight. Illinois’ cold temperatures actually help solar panels operate more efficiently (panels lose efficiency in extreme heat). The bigger challenge is winter snowfall, which can temporarily cover panels, though snow typically melts quickly and solar production resumes. Illinois experiences severe weather year-round — from winter ice storms to summer derechos — that can cause extended power outages. Pairing solar with battery backup provides critical energy security, keeping your heating, refrigeration, and essential systems running when the grid fails.
