Illinois Residential Solar in 2026: What Homeowners Need to Know

If you’re looking into Illinois residential solar, 2026 is shaping up to be a pivotal year. The federal residential tax credit is gone; that chapter closed on December 31, 2025. But Illinois has stepped up in a big way.

The state’s SREC program just got stronger. Residential SREC values increased by 34-43% for the 2026-27 program year (according to official Illinois Power Agency program updates), making now one of the best times in recent years to go solar.  Pair that with utility rebates and the property tax exemption, and the math still works, maybe better with rising electricity costs.

Here’s what Illinois homeowners need to know about going solar in 2026.

SUMMARY

• The federal residential tax credit expired after 2025 and is no longer available for homeowner-owned systems 
• Illinois Shines SREC payments increased 34-43% for residential systems in the 2026-27 program year 
• A typical 8 kW system in ComEd territory earns roughly $10,900-$14,000 in SREC payments 
• ComEd and Ameren offer $300/kW rebates for solar and $300/kWh for battery storage 
• Payment timing matters: SREC payments arrive about one year after installation, then shift to quarterly payments over 6 years

TABLE OF CONTENTS

• The Federal Credit Is Gone: Here’s What’s Replaced It
• Illinois Shines: What Homeowners Get in 2026
• The SREC Payment Timeline: What’s New
• Utility Rebates: Stacking the Savings
• Property Tax Exemption and Net Metering
• Getting an Accurate Number for Your Home
• Frequently Asked Questions
• Your Next Step

The Federal Credit Is Gone: Here’s What’s Replaced It

Let’s address this head-on. The federal residential tax credit that many homeowners used to rely on expired on December 31, 2025. It is not available for homeowner-owned systems in 2026.

This is a significant change. But Illinois has responded by strengthening its own programs.

Why Illinois Residential Solar Still Works Without Federal Incentives

Illinois has some of the strongest state-level solar programs in the country. The state’s incentives are funded by Illinois ratepayers, not federal dollars, which means they’re stable and secure despite federal policy changes.

The combination of:

• Increased SREC values
• Utility rebates
• Property tax exemption
• Net metering (supply-only)

…still delivers strong economics for homeowners with good sun exposure and a meaningful electric bill.

Illinois Shines: What Homeowners Get in 2026

The Illinois Shines program, also known as the Adjustable Block Program, is administered by the Illinois Power Agency. It’s the state’s primary solar incentive and operates by paying for the Renewable Energy Credits (RECs) a system is expected to generate over 15 years.

Higher SREC Values in 2026-27

For the 2026–27 program year, the Illinois Power Agency has implemented significant increases in SREC values. The finalized data outlines increases ranging from 34% to 43%, depending entirely on system size and utility territory: 

System Size	Ameren / Rural Co-ops	ComEd
Under 10 kW	36% increase	34% increase
10-25 kW	41% increase	43% increase

What That Means in Dollars

Current SREC prices for the 2025-26 program year are:

• ComEd (Group B): $83.87 per REC for systems under 10 kW 
• Ameren (Group A): $73.71 per REC for systems under 10 kW 

A typical 8 kW system in ComEd territory generating roughly 130 RECs over 15 years would earn approximately $10,900-$14,000 in SREC payments.

Who Qualifies

Illinois residential solar SRECs are available to homeowners with systems under 25 kW AC who work with an Illinois Shines Approved Vendor. The program is available statewide, regardless of whether your electricity is supplied by an investor-owned utility or an electric cooperative.

The SREC Payment Timeline: What’s New

Starting June 1, 2026, the SREC payment structure for residential systems changed. Instead of a single lump sum, payments are now distributed over seven years :

• 50% of the SREC value is paid in the first year (approximately 12-18 months after installation)
• The remaining 50% is divided into quarterly payments through years 2-7

This means homeowners won’t receive the full value upfront as a single check. But the total value is still the same, and the state has increased the overall SREC rates to compensate.

The payment process is streamlined through an approved SREC aggregator, Carbon Solutions Group. Homeowners sign a separate contract directly with the aggregator, who manages the state documentation and facilitates the SREC rebate payments straight to you. 

Utility Rebates: Stacking the Savings

On top of SRECs, Illinois homeowners can also qualify for utility rebates.

Distributed Generation Rebate

ComEd and Ameren offer a $300 per kilowatt (kW) DC rebate for Illinois residential solar systems with smart inverters. For a typical 8 kW system, that’s an additional **$2,400.

Battery Storage Rebate

If you add battery storage, the rebate increases to $300 per kilowatt-hour (kWh)** of storage capacity. A typical 10 kWh battery would add another **$3,000 in rebate value.

These rebates are applied after your system is interconnected and producing, which typically comes 3–6 months after the installation. 

Property Tax Exemption and Net Metering

Property Tax Exemption

Illinois law exempts Illinois residential solar installations from property tax assessments. While solar panels typically increase home value by $15,000-$25,000, this added value won’t increase your property tax bill.

Net Metering (Smart Solar Billing)

For Illinois residential solar systems installed after January 1, 2025, net metering operates on a supply-only credit basis. You receive credits for the supply portion of your excess electricity, not for delivery charges. This is part of Smart Solar Billing, which took effect in 2025.

Getting an Accurate Number for Your Home

The ranges in this post reflect the current Illinois residential solar market., but your home has specific inputs that determine the final number:

• Roof orientation and usable area
• Shade exposure
• Current ComEd or Ameren bill
• Electricity usage patterns

SREC values also vary by utility territory. ComEd and Ameren have different rates. A general estimate does not replace a site-specific one.

Windfree Solar has been installing in the Chicagoland area since 2009. We offer free, no-obligation estimates and can give you an estimated pricing breakdown, your specific SREC income estimate, and a realistic payback projection based on your actual home and energy usage. 

Get a free estimate for your home in 2026

Stop by our Solar Cafe to walk through the details in person.

Frequently Asked Questions

Q: Is the federal tax credit still available for residential solar in 2026?
A: No. The federal residential tax credit expired for homeowner-owned systems placed in service after December 31, 2025.

Q: What’s replacing it?
A: Illinois has strengthened its state-level programs. SREC values increased 34-43% for the 2026-27 program year, making the state incentives more valuable than before.

Q: How much can I save with Illinois SRECs?
A: For a typical 8 kW system in ComEd territory, SREC payments range from roughly $10,900 to $14,000. The value depends on your system size and utility territory.

Q: How does the SREC payment work now?
A: Starting June 1, 2026, residential systems receive 50% of the SREC value in the first year (after installation), with the remaining 50% paid in quarterly installments over the next six years.

Q: Do utility rebates still apply?
A: Yes. ComEd and Ameren offer $300/kW rebates for solar and $300/kWh for battery storage.

Q: How do I get started?
A: Contact Windfree Solar for a free, no-obligation estimate. We’ll give you current pricing, an SREC income estimate, and a realistic payback projection based on your actual home. 

Your Next Step

The federal residential tax credit is gone. But Illinois has stepped up with stronger state incentives than ever before. For homeowners with good sun exposure and a meaningful electric bill, the math still works and now might be the best time for the unforeseeable future to make the switch. 

Windfree Solar has been installing in Chicagoland since 2009. We offer free, no-obligation estimates and can give you current pricing, an SREC income estimate, and a realistic payback projection based on your actual home and energy usage. 

 Get a free estimate for your home in 2026

 Stop by our Solar Cafe to walk through the details in person.