- Ansonia11.5 business days
- Bethel6 business days
- Bloomfield2 business days
- Bridgeport19 business days
- Bristol3 business days
- Burlington1.5 business days
- Cheshire1 business day
- Colchester9 business days
- Danbury10 business days
- East Hartfordsame day
- East Haven12 business days
- East Lyme13 business days
- East Windsor4.5 business days
- Enfield30 business days
- Glastonbury12 business days
- Hamden14 business days
- Hartford21.5 business days
- Killingly1.5 business days
- Manchester6 business days
- Meriden25 business days
- Middletown3.5 business days
- Milford1 business day
- Montville15 business days
- New Britain1 business day
- New Haven6 business days
- New Milfordsame day
- Newtown6.5 business days
- North Haven20.5 business days
- Norwalk12.5 business days
- Orange7.5 business days
- Plainfield4 business days
- Plainville5 business days
- Seymour11 business days
- Shelton2 business days
- South Windsor6.5 business days
- Southington10 business days
- Stamford9 business days
- Stonington1 business day
- Stratford6.5 business days
- Torrington19 business days
- Trumbull2.5 business days
- Vernon3 business days
- Waterbury17.5 business days
- Waterford11 business days
- West Haven1 business day
Connecticut utility interconnection
| Utility | Approval before install | Apply via | Fee | Utility response | System size cap | Capacity map |
|---|---|---|---|---|---|---|
| Connecticut Light & Power Co (CL&P / Eversource) | Required | Portal | Online payment | 15 days (voluntary) | No size cap on record | Hosting capacity map |
| United Illuminating Co (UIC) | Required | No online payment | 15 days (voluntary) | No size cap on record | Yes |
Source: SolarTRACE, National Renewable Energy Laboratory (NREL), 2025-09-09 release. Times are medians for residential solar in the year shown. Requirements change — confirm current rules, fees and forms with the jurisdiction before you submit.