United Illuminating (UI), now a subsidiary of Avangrid, serves the Greater New Haven and Greater Bridgeport areas — including New Haven, West Haven, Hamden, Milford, Orange, Derby, Ansonia, Seymour, Shelton, and Bridgeport. UI customers face similar electricity rates to Eversource CT, making solar ROI consistent throughout its territory.
Key facts for United Illuminating solar customers:
- UI offers net metering under CT's netting tariff — excess solar earns bill credits at the retail rate
- UI administers its own CT RSIP block separate from Eversource CT's allocation
- Interconnection applications submitted by your installer through UI's portal
- Typical UI interconnection timeline: 6–14 weeks
- UI rates: $0.22–$0.27/kWh — comparable to Eversource CT
UI territory covers some of Connecticut's most densely populated municipalities. If you're unsure whether you're in UI or Eversource territory, your electric bill will show your utility provider. The Home Service Guide matches you with installers experienced in your specific utility's RSIP and interconnection process.