The 5 best solar installers in Illinois
New Day Solar Local
Why listed: Chicago-area residential installer with strong reputation in northern Illinois.
Stateline Solar Local
Why listed: Stateline-area residential solar installer with strong reputation across the IL/WI border region. Local design and install expertise for the Rockford metro and surrounding communities.
Sunrun National
Why listed: Largest U.S. residential solar provider. Strong IL presence with lease/PPA financing.
Tesla Energy National
Why listed: Tesla solar and Powerwall integration; strong fit for IL TOU rate plans.
Windfree Solar Local
Why listed: Chicago-based residential installer with strong city expertise and Illinois Shines program experience.
Illinois solar economics in 2026
| Metric | Illinois average |
|---|---|
| Average residential rate | $0.14–$0.18 / kWh |
| Typical 8 kW system cost (cash) | $22,000–$28,000 before incentives |
| Average $/W | $2.75–3.50 |
| Average annual production (kWh per kW) | ~1,200–1,350 kWh/kW/year |
| Net metering structure | Net metering at retail (ComEd, Ameren) — strong for residential |
| Average cash payback | 9–11 years |
For full state-by-state cost comparison see solar cost by state.
Illinois incentives and rebates
- Illinois Shines (Adjustable Block Program): Production-based SREC payments — strong incentive (often $5,000–$10,000+ over 15 years).
- Illinois Solar for All: Income-qualified incentive program.
- Property tax exemption: Added home value from solar exempt from property tax.
- Federal commercial ITC: Lease and PPA structures benefit from the commercial ITC pass-through. See federal tax credit guide.
What to verify before signing in Illinois
- Contractor license: Verify with your state contractor licensing authority before signing.
- NABCEP certification: Most reputable installers carry NABCEP-certified installers on staff. Ask which crew member holds the certification.
- Insurance: General liability + workers comp + roofer's insurance separate from electrical insurance.
- References from your county: Permitting and inspection requirements vary. Ask for 2–3 references from your specific county.
- Get at least three bids: Solar bids vary by 20–35% on the same scope of work. See how to compare solar bids.
Got bids from Illinois installers? Compare them properly.
Upload up to four solar proposals from any Illinois installer. The analyzer compares $/W, production estimates, equipment, and financing structure — and tells you which one to sign.
Analyze My Bids →Frequently asked questions about Illinois solar
Does solar make sense in Illinois?
Yes for most homeowners with a $150+ monthly electric bill, an unshaded roof, and 8+ years of expected ownership. Illinois's specific economics are summarized in the table above.
How much does a typical Illinois solar install cost in 2026?
$22,000–$28,000 for an 8 kW system before incentives. Effective net cost depends on your state and utility incentives.
Should I get more than three bids?
Yes — three is a minimum. Four or five is better. Solar bids vary by 20–35% on the same scope of work. See how to compare solar bids.
Are there other reputable Illinois solar installers besides these?
Many. The list above represents installers with strong public profiles in Illinois; reputable installers exist beyond it. Get bids from a mix and compare them objectively rather than relying on any one list.