Winnebago Electric Aggregation
Winnebago’s municipal electric aggregation buys electricity from MC Squared Energy Services at 10.4¢ per kWh, fixed through May 31, 2028. That’s 0.3¢ above ComEd’s current price to compare of 10.103¢.
How Winnebago’s Rate Compares With ComEd
Winnebago’s 10.4¢ rate is 0.3¢ above ComEd’s price to compare of 10.103¢, which applies from Oct 1, 2026 through May 31, 2027. On 1,000 kWh in a month, that’s about $2.97 more for supply.
| Supply price | Per kWh | On 1,000 kWh |
|---|---|---|
| Winnebago aggregation (MC Squared Energy Services) | 10.4¢ | $104.00 |
| ComEd price to compare | 10.103¢ | $101.03 |
| Difference | +0.3¢ | +$2.97 |
ComEd’s price to compare changes several times a year. It was 10.399¢ from June 1 to September 30, 2026, when Winnebago’s rate was the same as it. Among the 95 fixed-rate aggregation programs in ComEd territory, Winnebago’s is the 81st lowest.
These are supply prices only. ComEd still delivers the power and bills its delivery charges either way.
About Winnebago’s Program
MC Squared Energy Services supplies 118 of the 418 active Illinois aggregation programs, at a median fixed rate of 9.99¢.
| Community | Village of Winnebago, Winnebago County |
| Households | 1,134 occupied homes (Census 2020-2024 ACS 5-year) |
| Supplier | MC Squared Energy Services |
| Delivery utility | ComEd |
| Contract ends | May 31, 2028 |
| Enrollment | Opt-out: residents are enrolled unless they return the opt-out notice |
| Referendum | March 2012 |
| ICC list entry | “Winnebago | MC Squared Energy Services | 10.40 | May 31, 2028” |
How to Opt Out or Leave
Illinois rules are the same in every aggregation community. In the Illinois Commerce Commission’s words:
- Opting out. “The chosen supplier will send opt-out notices to all residents and eligible small businesses within the municipality or county. You will need to fill out and return the opt-out notice in order to be excluded from the aggregation program.”
- Leaving later. “Suppliers are prohibited from applying early termination fees or penalties to residential and small commercial retail customers who terminate their contracts and switch to a different supplier or go back to the utility's service.”
- If you already buy from a supplier. “If you are enrolled with a supplier or the utility's residential real-time program at the time the opt-out notices are being sent out, you will likely not be included in your municipality's or county's aggregation program.”
Source: Municipal Aggregation, Plug In Illinois (Illinois Commerce Commission). More on how Illinois aggregation works on the Illinois aggregation page.
Other Aggregation Programs in Winnebago County
13 other Winnebago County communities have an active aggregation program, cheapest first.
| Community | Supplier | Rate | vs. default | Ends |
|---|---|---|---|---|
| Burritt Township | Dynegy Energy Services | 9.39¢ | −0.71¢ | Aug 2027 |
| Pecatonica Township | MC Squared Energy Services | 9.45¢ | −0.65¢ | May 2027 |
| Seward Township | MC Squared Energy Services | 9.45¢ | −0.65¢ | May 2027 |
| Harlem Township - Winnebago County | Dynegy Energy Services | 9.67¢ | −0.43¢ | Sep 2027 |
| Owen Township | Dynegy Energy Services | 9.67¢ | −0.43¢ | Sep 2027 |
| Durand Township | MC Squared Energy Services | 9.85¢ | −0.25¢ | May 2028 |
| Loves Park | MC Squared Energy Services | 9.99¢ | −0.11¢ | Jun 2028 |
| Pecatonica | MC Squared Energy Services | 9.99¢ | −0.11¢ | Sep 2028 |
| Rockford | MC Squared Energy Services | 9.99¢ | −0.11¢ | Jun 2028 |
| Roscoe | MC Squared Energy Services | 9.99¢ | −0.11¢ | Jun 2028 |
| Laona Township | MC Squared Energy Services | 10.3¢ | +0.2¢ | Apr 2028 |
| Cherry Valley | MC Squared Energy Services | 10.4¢ | +0.3¢ | May 2028 |
| Durand | MC Squared Energy Services | 10.4¢ | +0.3¢ | May 2028 |
Frequently Asked Questions
Who supplies electricity in Winnebago’s aggregation program?
MC Squared Energy Services, under a contract that runs through May 31, 2028, according to the Illinois Commerce Commission’s municipal aggregation list (checked November 2, 2026). ComEd still delivers the power.
What is Winnebago’s electric aggregation rate?
10.4¢ per kWh, fixed until May 31, 2028. That is the supply price only; ComEd’s delivery charges are billed separately on the same bill.
Is Winnebago’s aggregation rate lower than ComEd’s?
No. Winnebago’s 10.4¢ rate is 0.3¢ above ComEd’s price to compare of 10.103¢, which applies from Oct 1, 2026 through May 31, 2027. ComEd’s price was 10.399¢ from Jun 1 to Sep 30, 2026, when Winnebago’s rate was the same as it.
How do I opt out of Winnebago’s electric aggregation?
Return the opt-out notice. The Illinois Commerce Commission says: “The chosen supplier will send opt-out notices to all residents and eligible small businesses within the municipality or county. You will need to fill out and return the opt-out notice in order to be excluded from the aggregation program.”
Is there a fee to leave Winnebago’s aggregation program?
No. The Illinois Commerce Commission says: “Suppliers are prohibited from applying early termination fees or penalties to residential and small commercial retail customers who terminate their contracts and switch to a different supplier or go back to the utility's service.”
When did Winnebago approve electric aggregation?
The ICC list gives Winnebago’s aggregation referendum date as March 2012. In Illinois, an opt-out program needs voters to approve it in a referendum.
Sources
- Municipal Aggregation List, Plug In Illinois (Illinois Commerce Commission), checked November 2, 2026: supplier, rate, contract end and referendum date.
- Price to Compare - ComEd | Plug In Illinois (Illinois Commerce Commission): the current price to compare, effective October 1, 2026.
- Historical prices to compare, Plug In Illinois (ICC): ComEd’s earlier prices.
- Municipal Aggregation, Plug In Illinois (Illinois Commerce Commission): opt-out and early-exit rules.
- U.S. Census Bureau, American Community Survey 2020-2024 ACS 5-year estimates, table B25002: occupied homes.
