The Glen Ellyn Aggregation Program is an opt-out program. That means that there is nothing you need to do to enroll. You will automatically be included in the aggregation program, unless you choose not to participate and opt-out. Qualifying Glen Ellyn residents who previously opted-out of the program, recently moved to the Glen Ellyn community, or are receiving service from another supplier may still enroll in the program. To enroll, call Eligo Energy at (312) 262-6656. Please have your utility account number for enrollments.