Solar Panels in Illinois
Everything you need to know about going solar in Illinois (IL).
| Average Sun Hours/Day | 3.9 hours |
| Average System Cost (8 kW) | $24,800 |
| Federal Tax Credit (30%) | -$7,440 |
| Net Cost After Federal Credit | $17,360 |
| Estimated Annual Savings | $1,480/year |
| Estimated Payback Period | 11.7 years |
| State Solar Incentives | Yes — state incentives available |
Solar Incentives in Illinois
Federal Investment Tax Credit (ITC)
The 30% federal solar tax credit is available to all Illinois residents. For an 8 kW system, this saves approximately $7,440.
State Incentives Available
Illinois offers additional state-level solar incentives, which may include tax credits, rebates, net metering, or renewable energy certificates. Check with your local utility and the DSIRE database for current programs.
Recommended Solar Panels for Illinois
With lower sun exposure (3.9 hours/day), Illinois homeowners need high-efficiency panels to maximize output:
- LONGi Hi-MO 7 — High efficiency N-type panel, excellent value
- Trina Solar Vertex S+ — Reliable performance, competitive pricing
- REC Alpha Pure-RX — Premium panel with industry-leading warranty
Frequently Asked Questions
How much do solar panels cost in Illinois?
The average cost of an 8 kW solar system in Illinois is approximately $24,800 before incentives. After the 30% federal tax credit, the net cost is around $17,360.
How much can I save with solar in Illinois?
An 8 kW solar system in Illinois can save approximately $1,480 per year on electricity bills, with an estimated payback period of 11.7 years.
Does Illinois have solar incentives?
Yes, Illinois offers state-level solar incentives in addition to the federal 30% tax credit.