ComEd solar interconnection: what it requires before you energize

Being verified being verified

Being verified being verified

Combined interconnection and net metering application through ComEd's portal, with a certificate of completion and witness test in the flow. No energizing before approval. documented

The big change: systems interconnected after Jan 1, 2025 get supply-only netting under CEJA. Exports earn roughly the 9 to 10 cent supply portion while imports pay full retail, about half the old value. One improvement: credits now roll over indefinitely. documented

Grandfathering trap: pre-2025 systems keep full-retail netting for life, but lose it if a modification forces a new interconnection application, and changing system size, swapping inverter type, or adding a battery all count. Think hard before touching a grandfathered system. documented

The consolation prize: CEJA's smart-inverter rebate pays $300 per kW for solar, more with batteries, potentially $6k+ combined, but the battery rebate requires enrolling in Hourly Pricing, and for grandfathered systems taking the rebate historically meant giving up full-retail netting. documented

sources: Illinois Shines net metering changes FAQ · CUB: what's happening to solar in 2025

ComEd nets your exports, but the meter still logs every reverse-flow interval, including ones you didn't plan. Worth knowing your real number before they do.

Clamp meter on the grid input · energy monitor on the export register

Building battery-first or zero-export anyway? Craftstrom · EZ-1 · EG4

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