How solar works in Illinois in 2026
The federal tax credit changed
The 30% federal residential clean energy credit (Section 25D) ended for systems installed after December 31, 2025. If you buy a system outright or with a loan in 2026, you cannot claim it. With a lease or power purchase agreement the solar company owns the system and may still qualify for business credits, which can affect the price you are offered. Ask any provider how this applies to your quote.
Illinois Shines
Illinois Shines, the state's Adjustable Block Program, pays for the Solar Renewable Energy Credits (SRECs) your system is expected to produce in its first 15 years. The payment usually goes through your installer and lowers your cost.
Net metering changed in 2025
Systems connected on or after January 1, 2025 are credited for the supply portion of the electricity they send to the grid, rather than the full retail rate. Systems connected before then keep the older terms.
Smart inverter rebate
ComEd and Ameren Illinois offer an upfront rebate for solar or battery systems that use a smart inverter able to communicate with the grid. Most current inverters qualify.
Illinois Solar for All and community solar
Illinois Solar for All helps income-eligible households go solar, including through community solar subscriptions. Community solar projects are also open to other residents through Illinois Shines.
Utilities: ComEd and Ameren Illinois.
Common questions
What changed with net metering in Illinois?
Systems connected from January 1, 2025 are credited for the supply part of the power they export, not the full retail rate. The smart inverter rebate was introduced alongside that change.
Can renters in Illinois get solar?
Often, yes, through community solar, including Illinois Solar for All for income-eligible households.
Official sources
This guide is general information, not financial or tax advice. Program rules and rates change; confirm current terms with the program administrator or a tax professional.