Connecticut interconnection applications

Connecticut Public Utilities Regulatory Authority (PURA)

PURA-approved EDC Guidelines: Docket 17-12-03 RE06 'Guidelines for Generator Interconnection - Fast Track and Study Processes' (Eversource/UI, 2023-12-20) and Docket 03-01-15 RE04 'Guidelines for the Interconnection of Residential Single Phase Certified Inverter-Based Generating Facilities' (<=25/50 kW) – Guidelines for Generator Interconnection · source

The two electric distribution companies: Eversource (CL&P) and United Illuminating; not municipal utilities (CMEEC members)

Joint EDC interconnection request submitted through each EDC's online portal (Eversource PowerClerk); separate simplified residential inverter guideline application

Fast Track/Study guideline: receipt confirmation 3 business days, completeness notice 10 business days, applicant 15 business days to cure; generator signs agreement within 30 business days; EDC witness test within 10 business days of request.

$200 inverter-based <=25 kW; $500 Fast Track; $1,000 Study + actual study costs (Table 1 of guideline; Eversource CT page).

General liability per guideline Table 2: <100 kW $300,000; >100 kW-1 MW $1,000,000; >1-5 MW $2,000,000; >5 MW $5,000,000; Eversource page lists N/A for inverter-based 0-25 kW but asks proof of insurance in residential application.

Eversource CT: isolation device (AC disconnect) must be visible and within 10 feet of main utility panel/meter; variance needs written approval.

Net billing – CGS 16-244z (Residential and Non-Residential Renewable Energy Solutions programs); legacy net metering CGS 16-243h
Traditional net metering closed to new residential customers end of 2021; RRES offers netting or buy-all tariff at fixed rates for the program term; NRES for non-residential. Program-year details not verified here.

Municipal electric utilities (CMEEC members, e.g. Norwich, Groton, Wallingford) are not under the PURA EDC guidelines and set their own interconnection/net metering policies.