Chicago Solar Overview
Chicago has emerged as one of the Midwest's best solar markets, thanks to Illinois's aggressive clean energy policies. According to NREL data, Chicago averages 4.2 peak sun hours daily. The Illinois Shines program provides significant SREC income, ComEd offers solid net metering, and the state has set ambitious renewable energy targets that support long-term solar growth.
ComEd Net Metering
How ComEd Net Metering Works
ComEd's net metering program is straightforward and favorable for solar customers:
- Full retail credit: Excess generation credited at full retail rate
- Monthly rollover: Credits carry forward month to month
- Annual settlement: Unused credits paid out at avoided cost rate
- System size limit: Up to 25 kW for residential
ComEd Rate Details
| Rate Component | Details |
|---|---|
| Average Rate | ~$0.14-0.16/kWh |
| Net Metering Credit | Full retail rate |
| Fixed Charges | ~$12-15/month (not offset by solar) |
| Time-of-Use | Optional program available |
Illinois Shines (SRECs)
Illinois Shines is the state's SREC program and is a major factor in Chicago solar economics. It provides upfront payments for the clean energy your system produces.
How Illinois Shines Works
- 5-year contract: Locked-in payments based on expected production
- Upfront payment: Most of the value delivered at installation
- REC value: Varies by program year and block
- Installer partnership: Usually facilitated through your installer
Federal Tax Credit (2026 Update)
| Purchase Type | Federal Credit | Notes |
|---|---|---|
| Cash/Loan Purchase | None (25D expired) | Ended Dec 31, 2025 |
| PPA/Lease | 30% (48E) | Through Dec 2027 |
Costs & Savings in Chicago
Typical System Costs
| System Size | Gross Cost | After IL Shines* |
|---|---|---|
| 5 kW | $15,000 | $11,000-13,000 |
| 7 kW | $21,000 | $15,000-18,000 |
| 10 kW | $30,000 | $22,000-26,000 |
*Illinois Shines value varies by program block and timing
Savings Estimates
- Annual production: ~1,150 kWh per kW installed
- Annual electricity savings: $160-185 per kW
- Illinois Shines value: $400-850 per kW (5-year present value)
- Payback period: 8-12 years
- 25-year savings: $20,000-35,000
Windy City Weather Considerations
Chicago Climate Factors
Chicago's climate presents both challenges and advantages for solar:
- Lake effect: Lake Michigan influences cloud patterns, especially in winter
- Cold winters: Panels more efficient in cold; snow usually self-clears
- Wind: Proper racking installation is essential
- Long summer days: 15+ hours of daylight in June offsets shorter winter days
Flat Roof Considerations
Chicago has many flat-roof homes (especially in urban neighborhoods). For flat roofs:
- Ballasted systems: Weighted racking without roof penetrations
- Optimal tilt: Racks angle panels for better production
- Snow shedding: Tilted panels clear snow better than flat-mounted
- Spacing: Rows need spacing to avoid self-shading
The Bottom Line
Chicago is one of the Midwest's best solar markets. Illinois Shines SRECs, ComEd's full retail net metering, and state property tax exemption create favorable economics. Payback periods of 8-12 years are typical—competitive with many sunnier states.
Best candidates: Homeowners with south-facing roofs (flat or pitched), minimal shading, electric bills over $100/month, and plans to stay 8+ years. The Illinois Shines program particularly rewards early adopters in each program block.
Key consideration: Illinois Shines value varies by program block. Getting quotes sooner rather than later can lock in better SREC rates before blocks fill up.
Questions About Chicago Solar?
Our AI can help you understand ComEd programs, Illinois Shines SRECs, and whether solar makes sense for your Chicagoland home.
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