Municipal (Electrical) Aggregation

The City of Warrenville is continuing its electric aggregation program with Eligo Energy. With this program renewal, residents and small business owners are assured a rate match with ComEd and will continue to receive the benefit of 100% Green Renewable Energy! The program term is twelve months ending October 2022. 
The program is slightly different this year in that some participants will be supplied by Eligo, and others will be supplied by ComEd.  All customers will continue to receive billing and service through ComEd. The net effect will be identical for all: same rate, no added fees, and 100% Renewable Energy Credits representing all power consumed within the program. 
Customers will be receiving notices from Eligo based on their specific account. For questions, please contact the City's electric aggregation consultant, NIMEC at 800-727-3820 or by email.

Learn more about Renewable Energy Certificates.

No one from Eligo, ComEd, or the City will ever visit your home or call you to enroll. 
If a solicitor claims to be the City supplier, Eligo, or ComEd, take their information and report the incident to the ICC at Never reveal your ComEd account number or allow a solicitor to view your ComEd bill unless you are certain you wish to enroll with that supplier and have read all terms and conditions. 


Notices will be mailed to eligible residents and small businesses on August 12, 2021. 

1.    Green Aggregation (Opt-out) Notice: Ratepayer will be switched to supplier Eligo Energy unless they take action to opt out as described in the notice.

2.   Return to ComEd Service: Ratepayer is currently enrolled with supplier Eligo Energy but will be moved back to ComEd. You need not do anything and are still considered part of the program paying the ComEd rate with 100% green energy. In September, you can expect to receive a second letter from ComEd confirming your drop.

3.   Opt-In Notice: Ratepayers are enrolled in a separate individual supplier contract and will remain at their current status. However, if the ratepayer would like to enroll in the City's Green Energy program they may take action to opt in.

4.   Informative Only: Ratepayer previously enrolled in a private contract and the status will not change. 

Program Benefits

  • Supply rate will match ComEd supply rate during the one-year term ending October 2022
  • No hidden fees, no termination fee, flexibility to leave the program
  • The City will earn designation as an EPA Green Power Community
  • Residents’ power consumption is offset by 100% Green Energy via Renewable Energy Certificates
  • The City’s Carbon footprint will continue to be reduced


Many Illinois communities began buying their electric power from suppliers other than ComEd. With a different supplier, nothing changes in the infrastructure; ComEd continues to do the billing and continues to repair any outages. In March 2012, a referendum passed that allowed the City to solicit bids on behalf of residents and small businesses to buy electric power on the open energy market. The goal was to secure lower electric supply rates for residents and small businesses in the community, preserve flexibility in choice, offer a rate guarantee, and utilize 100% renewable energy.

Since the State of Illinois deregulated electric power providers, 75% of commercial businesses now buy their power from suppliers other than ComEd. But few residents have moved to lower-cost energy suppliers. As a result, the State created legislation allowing communities to leverage residential accounts by engaging in a process called "Municipal Aggregation." It enables municipalities to solicit competitive bids from suppliers on behalf of the entire community. This is similar to the way a community sets rates for garbage collection.

Reference Documents

Ordinance 2684 Providing for the Referendum (PDF)

Certified Election Results (PDF)

Ordinance 2721 Adopting a Plan of Operation and Governance (PDF)