All 60 utilities / Pepco
Pepco solar interconnection: what it requires before you energize
How does Pepco detect unpermitted backfeed?
Being verified being verified
What happens if they catch you?
Being verified being verified
Small and DIY interconnection requirements
Green Power Connection portal. Written approval required before install or operation. documented
DC approval times reported at 12 to 24 weeks. reported
MD plug-in solar legal since May 2026 (HB 1532), systems under 391 W exempt from UL listing. DC's GRID Act still pending in Council. documented
Full retail 1:1 in both territories. documented
sources: Pepco Green Power Connection · MD Level 1 form (PDF)
How Pepco interconnection works in practice
Pepco interconnection runs through the Green Power Connection portal, the same Exelon system its sister utilities Delmarva and BGE's neighbors use. Application before installation, with the single-line diagram and equipment cut sheets attached, and installers usually file but homeowners can submit directly.
Territory matters here: Pepco spans DC and the Maryland suburbs, and the rules differ by side. Maryland customers get the statewide Level 1 process and the plug-in solar exemption that went live in May 2026. DC customers follow DC's own interconnection rules and SREC market, one of the strongest in the country.
Netting is 1:1 retail on both sides, with credits rolling forward monthly. The practical sequence: portal application, approval, install, jurisdiction inspection, then Pepco's authorization before the system exports anything.
Verify your export before Pepco does
Pepco 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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Related: Central Maine Power (ME)
Planning a zero-export or plug-in setup here? See the zero-export reality check and equipment notes.
Every claim above is evidence-graded: documented means it traces to the tariff or the utility's own filings, reported means a dated community report. The full table covers 60 utilities: see all of Gridrules.