Grayslake Electric Aggregation
Grayslake’s municipal electric aggregation buys electricity from MC Squared Energy Services at a price that matches ComEd’s price to compare each month, through September 30, 2028.
How Grayslake’s Rate Compares With ComEd
The Illinois Commerce Commission lists Grayslake’s rate as “ComEd Match PTC+PEA.” MC Squared Energy Services charges ComEd’s price to compare plus the Purchased Electricity Adjustment (PEA), so the supply price moves with ComEd’s default rate instead of staying fixed. ComEd’s price to compare is 10.103¢ per kWh from Oct 1, 2026 through May 31, 2027.
These are supply prices only. ComEd still delivers the power and bills its delivery charges either way.
About Grayslake’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 Grayslake, Lake County |
| Households | 8,165 occupied homes (Census 2020-2024 ACS 5-year) |
| Supplier | MC Squared Energy Services |
| Delivery utility | ComEd |
| Contract ends | September 30, 2028 |
| Enrollment | Opt-out: residents are enrolled unless they return the opt-out notice |
| Referendum | April 2011 |
| ICC list entry | “Grayslake | MC Squared Energy Services | ComEd Match PTC+PEA | September 30, 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 Lake County
14 other Lake County communities have an active aggregation program, cheapest first.
| Community | Supplier | Rate | vs. default | Ends |
|---|---|---|---|---|
| North Barrington | MC Squared Energy Services | 10.8¢ | +0.7¢ | Dec 2027 |
| Lake Zurich | MC Squared Energy Services | 10.9¢ | +0.8¢ | Aug 2027 |
| Buffalo Grove | MC Squared Energy Services | Utility match | — | Dec 2027 |
| Deer Park | MC Squared Energy Services | Utility match | — | Oct 2027 |
| Deerfield | MC Squared Energy Services | Utility match | — | Oct 2027 |
| Hawthorn Woods | MC Squared Energy Services | Utility match | — | Feb 2027 |
| Highland Park | MC Squared Energy Services | Utility match | — | Oct 2027 |
| Kildeer | MC Squared Energy Services | Utility match | — | Sep 2032 |
| Lake Barrington | MC Squared Energy Services | Utility match | — | Aug 2027 |
| Lake Bluff | MC Squared Energy Services | Utility match | — | Oct 2027 |
| Lake Forest | MC Squared Energy Services | Utility match | — | Oct 2027 |
| Libertyville | MC Squared Energy Services | Utility match | — | Aug 2027 |
| Round Lake Beach | MC Squared Energy Services | Utility match | — | Feb 2027 |
| Zion | MC Squared Energy Services | Utility match | — | Aug 2027 |
Frequently Asked Questions
Who supplies electricity in Grayslake’s aggregation program?
MC Squared Energy Services, under a contract that runs through September 30, 2028, according to the Illinois Commerce Commission’s municipal aggregation list (checked November 2, 2026). ComEd still delivers the power.
What is Grayslake’s electric aggregation rate?
The ICC lists it as “ComEd Match PTC+PEA”: MC Squared Energy Services charges ComEd’s price to compare plus the Purchased Electricity Adjustment, so the price moves with ComEd’s default rate instead of being fixed. ComEd’s price to compare is 10.103¢ from Oct 1, 2026 through May 31, 2027.
How do I opt out of Grayslake’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 Grayslake’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 Grayslake approve electric aggregation?
The ICC list gives Grayslake’s aggregation referendum date as April 2011. 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.
- 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.
