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Ameren Illinois Custom Energy Efficiency Incentives.

Custom incentives support measured energy-saving projects that do not fit Ameren Illinois standard incentive applications.

Offered byAmeren Illinoisverified 2026-07-10

Overview

What it does.

Ameren Illinois calculates custom incentives from projected energy reductions for eligible projects. Applicants should engage the program before committing to a custom project because engineering review and preapproval may be required.

Best for: A larger or process-specific energy project without a matching prescriptive incentive.

Eligibility

Who and what may qualify.

Eligible applicants

  • Nonresidential Ameren Illinois electric and/or gas delivery customers with qualifying projects not covered by standard incentives

Applicants excluded by the source

  • Applicants without applicable Ameren Illinois delivery service for the proposed measure

Eligible uses

  • Compressed air
  • Large HVAC and controls
  • Heat recovery
  • Water-treatment process improvements
  • Combined heat and power
  • Other measured energy-saving projects

Application

How to start.

  1. Request an Ameren Illinois energy consultation.
  2. Document the proposed measure and expected energy savings.
  3. Obtain required preapproval before purchase or installation.

Timing: Applications are handled through current business program forms, subject to available funds.

Planning notes

Limits to account for.

  • A Chester address alone does not establish eligibility; the facility must have an applicable Ameren Illinois electric and/or gas delivery account and rate.
  • Savings calculations and project eligibility must be accepted by the program.
  • Do not begin work before confirming preapproval requirements.

Coordinate other incentives with Ameren Illinois so combined assistance does not exceed eligible project costs or program caps.

Evidence

Official sources.