Illinois Net Metering Laws & Utility Buyback Explained (ComEd & Ameren)
Spoke ArticleIllinois1 min readVerified Q1 · 2026

Illinois Net Metering Laws & Utility Buyback Explained (ComEd & Ameren)

SBI Editorial DeskUpdated Q1 · 20262 sections

Illinois mandates robust net metering policies that protect homeowners. If you use major utilities like ComEd or Ameren, understanding the true-up cycle is vital to maximizing your savings.

01

How 1:1 Retail Net Metering Works

During bright summer days, your system will likely generate more power than your home can consume. This excess electricity flows backwards into the local grid. Your utility company is required by law to credit your account for this power at a full 1:1 retail rate.

02

The April Annual True-Up

You bank these summer credits to offset your energy consumption during the harsh winter months. Illinois operates on an annualized net metering cycle that traditionally concludes in April, ensuring you have the entire dark winter to drain the massive bank of credits you generated in July and August.

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