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Municipal Electric Aggregation

UPDATE:  Starting in September 2015, the Village is using Dynegy for energy services.  The new rates are $0.06935 per kw/hr for the first 12 months (September 2015-September 2016) and which steps down to $0.06579 per kw/hr for September 2016- September 2017.  ComEd rates float every month and are available here:

Existing residents were automatically enrolled in the program, however new residents or residents changing location in the Village must sign up to participate. If you are interested in enrolling, take the following steps:

1.      Set up an electricity account with ComEd.

2.      Call Dynegy at 1-844-351-7691 and request to be added to the Village of Clarendon Hills Aggregation Program.


Since implemented through a referendum in November 2012, electric aggregation has saved residents of Clarendon Hills over $625,000 in comparison ComEd Supply rates.  Due in part to competitive pressure, ComEd has reduced rates and amended rate setting practice to allow for a more adjustable rate during the year.  Now ComEd is allowed to float approximately $.005 per kilowatt hour monthly above or below rate and is allowed two rate setting dates (one in October, one in June).  This flexibility has allowed ComEd to undercut much of the municipal aggregation market, and many communities have returned to ComEd.

How can I enroll in the program?
You need do nothing if you have an eligible resident or small commercial electric account; you will automatically be enrolled unless you opt out.

What is an eligible resident or small commercial account?
Any resident who is currently with ComEd and has not already switched to an Alternate Retail Electric Supplier (ARES) or who is not enrolled in a special Residential Real-Time Pricing (RRTP) program is eligible, and small commercial accounts are eligible. You must also have a residence or business located in the Village of Clarendon Hills.

What is a “small commercial account?”
A small commercial account is defined by the ICC as a commercial account using under 15,000 kWh per year.

What if I don’t want to be in the program? 
You may opt out before the program begins. All eligible resident and small commercial ratepayers will receive an opt out notice. They must sign and return the notice as directed within the letter within the 14-day opt out period if they do not wish to be in the program. Otherwise, they will automatically be enrolled.

I am located in Clarendon Hills’ Village limit, have already switched to another ARES, but would like to join the program. Can I do this?
Yes. Contact Dynegy directly to enroll (1-844-351-7691). You are advised to check your current contract to review any early termination fees for which you may be liable. You may wait for your current contract to expire before enrolling in the aggregation program. You may join the program at any time during the two-year contract, for no fee. Please be aware of ComEd's stay requirement, however. It is advised that you remain with your ARES until the Constellation Program has been implemented in order to avoid the stay requirement.

What is ComEd’s 12-month “stay” requirement?
Please note ComEd regulation prohibiting customers from switching accounts frequently. If your account was with an ARES and you moved back to ComEd more than two months ago, you are under a 12-month “stay” and may not switch to a new supplier for that period. If you are automatically enrolled in the Village’s aggregation program, and later switch back to ComEd, you must switch to a new supplier within two months or you will be subject to that 12-month stay. If you have never chosen a supplier and choose to opt out of the aggregation program, you are not under a 12-month stay and may switch to another supplier at any time.
If I am automatically enrolled in the program now, can I leave the program at any time?
Yes, you may leave the program and move your account back to ComEd or another ARES, and at no early termination fee. 
When can I expect to begin saving money?
Your account will be enrolled in the aggregation program sometime early 2013, with the savings reflected on the following month’s bill.
What is the history of electric aggregation?
The Illinois General Assembly began deregulating electric supply in 1997. Since that time, commercial consumers and, more recently, residential consumers have been able to independently purchase power from a third party, known as Alternative Retail Electric Suppliers (ARES). In 2009, Governor Quinn signed Public Act 96-176 that allows municipalities to negotiate for electric supply on behalf of residents and small businesses, commonly referred to as municipal electric aggregation.
What impact does aggregation have on ComEd?
The local aggregation program will not affect how consumers receive electricity, report outages or pay bills. ComEd, which manages the delivery system, but does not generate electricity, will continue to be responsible for the electricity infrastructure, billing and consumer response. As a result, aggregation will have no impact on the reliability of the electric system, either positive or negative.

Is my commercial account included in the aggregation?
Only very small commercial accounts in the category of 0-15,000 kWh annual use are included. The program includes “small commercial” accounts, and the ICC has defined small commercial to include only those business accounts using under 15,000 kWh per year.

What happens if the power goes out? Whom do I call?
You should always continue to call ComEd with any service issues. ComEd will still deliver your electricity. Dynegy is the electricity supplier. (ComEd is no longer an electric supplier; they only deliver the power, and maintain the network of wiring, stations, etc.)

Will I get two bills?
No. You will continue to receive a bill from ComEd, and will remain on any budget billing payment plan you currently have. You will still have an account with ComEd. The only difference on your bill is the new lower rate and Dynegy will be listed as the supplier. The transition of power supply to the new ARES is expected to be seamless; you would observe no change in your supply. 

What savings can I expect to receive?
The Village's new electric supply rate is 39.8 percent lower than the current ComEd rate. Based on average electricity usage in Clarendon Hills, this results in an average savings of $458 annually. Individual savings may be more or less depending on electricity usage. These rates will be in place for 24 months, however in the event that ComEd's rates were to fall below the supplier rate of 5.313 cents per kWh, the Village has the ability to end the contract and return customers to ComEd. The electric market prices are not static, and the Village cannot project the trend of rates in the future.

What if the ComEd rate drops below the Village’s contracted rate at some future time?  
Residents can drop out at anytime.  If the rate falls far below the ComEd rate, the Village will make every effort to inform residents.

Will someone come to my home or call to sign me up?
No. You need do nothing to automatically be enrolled in the program. If someone contacts you, requesting your ComEd account number and claims to be representing the Clarendon Hills program, please report such activity to Village Hall or file a complaint with the ICC at

What is the length of the Village contract? How long will I receive this rate?
The Village entered into a 24 month contract with a rate guaranteed for that time frame. 

What will happen after the contract term? 
Following the initial contract term, the Village would either enter into another electric supply contract using the same biding process or return power to ComEd, depending on the market situation. In addition, there may be other market changes or other issues that arise during the first contract term that would cause the Village to re-evaluate the program. The goal of the current aggregation program is to bring the best available electric supply rates to eligible customers. That goal would continue in the future. However, due to market fluctuations, it is not possible to predict what that rate would be.

I am getting offers from retail electric suppliers to switch for lower rates. What should I do?
If you switch your electric account to a new supplier prior to the aggregation program, you will not be included in the community aggregation. If you switch to a new supplier, and later want to join the community aggregation, it is possible you may have to pay a termination fee. Be sure to review the details of the offer. If you do not switch to a new retail supplier, you will automatically be included in the aggregation program.

Will I still be able to participate in the PIPP and LIHEAP low-income assistance programs?
Yes. If you are currently receiving low-income assistance through these programs, the aggregation would not change your status. You may continue to participate. Should you sign up with an alternative electric supplier outside of the Village’s aggregation program in your own individual contract, however, you would no longer be able to enjoy these low-income assistance programs.

What if I am enrolled in ComEd's real-time pricing program?
Customers in ComEd's real time pricing program are automatically excluded from the program. However, you may choose to still opt-in if you believe it will be advantageous for you. Because of the way the program works, it is difficult to compare what cost savings a real-time pricing customer would see under aggregation because of the changes in the electric market pricing. A customer could compare their average cost per kWh from the previous year versus the aggregation rate, however the past year's rates are not a guarantee of the next year's rates.  

Are other municipalities engaging in municipal aggregation programs?
Yes, in 2011, nineteen Illinois municipalities began the first municipal aggregation programs in the State. In the March 2012 election, an additional 245 municipal bodies passed referenda to undertake municipal aggregation programs for their communities. Over 1.5 million residents in northern Illinois have successfully switched to new, lower cost power suppliers through municipal aggregation programs and are today saving money on their electric bills.

If you have additional questions about Electric Aggregation, please contact Zach Creer, Assistant to the Village Manager, at 630-286-5402 or

Additional Resources
Citizen's Utility Board Guide to Electric Aggregation
ComEd's web page on Electric Aggregation

Additional Materials

Operation and Governance
Electric Aggregation Press Release
lectric Aggregation Presentation (PowerPoint)
lectric Aggregation Press Release 11-7-12