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Illinois Net Metering (ComEd & Ameren)
Grantya researchSee program
Illinois law requires ComEd and Ameren to offer net metering to customers with renewable generation systems. Credit rate: retail rate (1:1 for energy value). No system size cap for commercial (subject to interconnection agreement). Excess credits roll forward monthly; annual excess may be paid out at avoided cost rate. Net metering is a critical component of commercial solar ROI — it determines the effective value of every kWh produced beyond on-site consumption. Unlike WI/MN which have superior net metering, IL retail-rate net metering is solid but not exceptional.
Program details
- Full Name
- Illinois Net Metering Policy — ComEd and Ameren Territory
- Type
- state
- Client Type
- both
- Project Types
- solar
- Eligibility
- ComEd or Ameren Illinois electric customer | Renewable generation system on customer premises | Commercial: interconnection agreement with utility required | System must be sized to meet no more than annual on-site load (for residential)
- Status
- open
- Stackable With
- federal_itc_solar, section_48e, illinois_shines
- State
- IL
- Notes
- Net metering is policy, not a grant program — include in solar ROI calculations. Illinois rate: retail rate credit. Key comparison: WI and MN have similar or better net metering; IN has worse (avoided cost). Verify current tariff rates with ComEd/Ameren as these are subject to ICC review.
Source: Grantya research. Always confirm current terms on the official program page.