The City of Carbondale participates in the Southern Illinois Aggregation Partnership (SIAP), a group of 94 communities that purchase electricity supply together to help secure competitive rates for residents. 

The current aggregation rate through Homefield Energy is $0.11789/kWh, fixed from June 1, 2025, through June 2026. This is lower than Ameren’s summer price to compare of $0.12547/kWh (June–September 2025). 

What to Expect Going Forward 

• The program is being updated to provide more stable pricing through December 2028  

• The base portion of the rate will be locked in long-term, with only capacity costs changing over time  

• Residents can opt out at any time with no fees  

• A new website tool will be available to track current rates  

• Fewer opt-out letters will be sent moving forward  

One final opt-out mailing is expected before the current contract period ends in 2028. 

Opt-Out Information 

Residents will receive a letter from Homefield Energy if eligible. 

• Do nothing to remain in the program  

• Opt out by following the letter instructions or calling 866-694-1262  

There is no penalty to opt out at any time. 

Important Notes 

• Residents who have previously opted out will generally not receive additional letters  

• Ameren’s 12-month minimum stay rule may apply if switching back to their supply  

• Solar customers may want to opt out to avoid losing net metering credits 

For questions on the aggregation program with Homefield Energy Jordan Haarmann at 618-203-8328 or email at jordan.h@agellc.com 

For media requests contact Public Relations Officer, Eva Fisher, at 618-713-0711 or email at efisher@carbondaleil.gov.