Illinois Energy Efficiency Obligation

In 2007, the government of Illinois introduced an energy efficiency obligation for all sectors except transport, covering electricity and gas. Obligated parties include investor-owned electricity and natural gas utilities. Department of Commerce and Economic Opportunity is responsible for 25% of the spending by administering public programmes through a dedicated fund. The obligation seeks to achieve an electricity savings target in 2015 equaling 2% of sales, and a natural gas savings target of 1% of sales. Eligible energy efficiency measures include lighting; motors; drives; heating systems; HVAC; refrigeration; and CHP. In 2017, the Illinois Legislature passed an expansion to the state's EERS requiring ComEd and Ameren to achieve cumulative 21.5% and 165 reductions in energy use by 2030, respectively. Calculation of savings is based on deemed savings and customised savings. Evaluation contractors are managed by the utilities and The Department of Commerce and Economic Opportunity with ICC oversight authority. Illinois has established formal rules and procedures for evaluation. An independent evaluation of the utilities and Department of Commerce & Economic Opportunity's energy efficiency programmes is performed annually.

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