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CUB Q&A: What’s happening to solar power in Illinois in 2025? 

A solar benefit called “net metering” is NOT going away in 2025, but it is changing, under state law.   

What is net metering?
Net metering is a benefit for solar users. Under Illinois law, investor-owned utilities (ComEd, Ameren, MidAmerican) are required to offer net metering for renewable energy generation (such as solar power).

This means anytime the solar panels a consumer installs generate more power than the household needs, that consumer can sell that excess electricity back to the utility and receive electric bill credits. The utility will only charge the solar customer for the net amount of electricity consumed, plus any other fixed delivery charges (such as the customer charge, standard metering charge, delivery service cost adjustment).

It used to be difficult for solar users in Illinois to sell excess power back to the utility, but in 2008 legislation took effect that simplified the process. 

So what’s happening in 2025?
On Jan. 1, 2025, the net metering benefit is being reduced for Illinois residents who decide to install solar panels on their homes. Two important points: 

  1. The benefit is being reduced for new solar customers only. Illinois consumers who already have solar panels on their homes will continue to get the full net metering benefit over the life of their system.
  2. While the benefit is being reduced, it is still a benefit, and solar is still a good deal for Illinois consumers.

How will the net metering benefit change after 2025?
Net metering currently gives 1:1 per kilowatt-hour credits on these parts of your electric bills: Supply, Delivery and taxes and fees.

If you have solar panels on your home now: You are guaranteed this current version of net metering for the lifetime of your system (defined, under net metering regulations, as 30 years from the date the solar installation received permission to operate). That means you will continue to have this full benefit on all three sections of your bill.  

If you install solar panels after Jan. 1, 2025 a few significant changes:  

  • Net metering credits will be applied to the Supply section of your bill only, rather than all three sections.
  • You also will be eligible for a “Distributed Generation (DG) Rebate.” The rebate requires the use of a smart inverter (equipment that helps transfer electricity from the solar panels to your home) and the value of the rebate will depend on the size of your installation. (Under law, the value of the rebate will be at least $300 per kilowatt of generating capacity.)
  • Your net metering credits will not be subject to an annual reset or zeroing out. This means, your excess net metering credits will roll over month to month and never expire. (Note: Current net metering customers not on Hourly Pricing and who have not taken the DG Rebate will continue to see an annual expiration on their excess rollover credits.)

To summarize, this new system means customers who install solar panels after Jan. 1, 2025 will receive 1) a larger benefit upfront; 2) a reduced net metering benefit throughout the lifetime of the system; and 3) credits that never expire.

If I’m considering solar, what should I do?
If you are interested in getting the full net metering benefit, CUB recommends that you explore if it’s realistic to install solar panels before the end of the year. The law sets a deadline of Dec. 31, 2024, and based on discussions with solar advocates, ComEd and Ameren Illinois have released more details on what that means.

ComEd:
ComEd residential and small business customers will receive full net metering benefits if by 5 p.m. (Central) Dec. 31, 2024:

  • The solar system has been installed, tested and a final inspection (if required by the local authority) has been completed. 
  • These documents have been submitted through the utility’s designated online portal:
    • Net Metering Application
    • Certificate of Completion (COC), including this supporting documentation: 
      • Close-up photo clearly showing the nameplate with model and serial number of the inverter.
      • Signed approved inspection form (if required by the local authority). If no inspection form is required by the local authority an itemized invoice or receipt including inverter model/serial number and address of installation is required.
      • If microinverters are installed, include a single file listing all the serial numbers.
      • If a storage system is installed, include a photo of the battery nameplate.

Ameren:
Residential and small business customers will receive full net metering benefits if by 5 p.m. (Central) Dec. 31, 2024: 

  • The solar system has been installed, tested and a final inspection (if required by the local authority) has been completed.
  • These documents have been submitted through the utility’s designated online portal:
    • Net Metering Application.
    • Witness Test Request (WTR).
    • Certificate of Completion (COC), including this supporting documentation:
      • Photos of required signage / placarding.
      • Proof of insurance.
      • Installer certification.
      • Signed approved inspection from the local authority having jurisdiction (where applicable)

Note for both Ameren and ComEd customers: It is NOT required to have utility approval by the Dec. 31 deadline–just that all documentation has been submitted. Check with your installer to make sure they understand all that is required by this deadline. The installer should provide the Certificate of Completion (COC)–but if they don’t, make sure to ask for it.

If you have any questions about these deadlines, please contact your utility, Ameren or ComEd.

Will I lose savings?
If you currently have panels on your home, the way you are compensated for net metering will not change.

If you install panels after Jan. 1, you will continue to save on your utility bills, but the net metering benefit will be lower.

Why is this happening?
A transition like this is typical in states as they achieve higher levels of solar adoption–and Illinois in recent years has enjoyed a solar boom. 

A reduction in the net metering benefit was planned in state law as far back as the Future Energy Jobs Act of 2016. The utilities would have preferred this change happen much sooner than 2025, but consumer advocates successfully extended full net metering benefits for years.

While advocates like CUB would have preferred to see the benefit extended further, even without that full benefit, solar will continue to secure lower utility bills into the future.  

For more info on rooftop solar, read CUB’s fact sheet.

Is the Community Solar program impacted by this change?
No. Illinois’ Community Solar program allows consumers to get the benefits of solar power without having to install panels on their property. Under the program, participants can subscribe to a portion of an off-site solar farm, and get credits on their electric bills based on the energy output of that subscription. Community Solar participants are not impacted by this change in solar policy.