Illinois Commercial Energy

Bills and Data Guides

Reviewed resources in this topic. Dates and official sources are shown within time-sensitive guides.

Commercial Interval Data: Request, Validate, and Use It

A practical Illinois guide to requesting utility interval usage data, checking CSV quality, calculating load shape, and using it in energy procurement.

Updated 2026-07-19

How to Read a ComEd Commercial Electric Bill

A field-by-field guide to ComEd business bills: delivery, supply, usage, demand, capacity context, adjustments, and supplier comparison.

Updated 2026-07-19