Sources reviewed · 3 regulation sources
What to know in Connecticut.
PURA states that Residential Renewable Energy Solutions replaced legacy net metering and the residential solar incentive program, and is administered by Eversource and United Illuminating.
UI reviews residential program and interconnection applications together through its Renewable Energy Solutions portal.
The PURA program page identifies the regulated utilities administering RRES. Confirm eligibility, current-year tariff choice, and treatment of an existing system with the actual utility.
Who provides electricity here?
Narrow possible delivery utilities by ZIP or confirm yours
Find the delivery utility on your electric bill first. A retail supplier or on-site solar seller may be a different company; your delivery utility handles the local grid connection.
Lists regulated distribution companies and municipal electric providers. Retail suppliers are separate from the local distribution utility.
Electric Distribution Companies — Connecticut PURABrowse 26 reported provider records in Connecticut
26 records
Electric delivery utilities 11
Connecticut Light & Power CoInvestor Owned · EIA 4176Reported counties (8)
Fairfield, Hartford, Litchfield, Middlesex, New Haven, New London, Tolland, Windham
- United Illuminating CoInvestor Owned · EIA 19497
Reported counties (2)
Fairfield, New Haven
- Town of Wallingford - (CT)Municipal · EIA 20038
Reported counties (1)
New Haven
- City of Norwich - (CT)Municipal · EIA 13831
Reported counties (1)
New London
- Groton Dept of Utilities - (CT)Municipal · EIA 7716
Reported counties (1)
New London
- City of South Norwalk - (CT)Municipal · EIA 17569Residential service not separately reported
Reported counties (1)
Fairfield
- Norwalk Third Taxing DistrictMunicipal · EIA 13825Residential service not separately reported
Reported counties (1)
Fairfield
- City of Jewett City - (CT)Municipal · EIA 9734Residential service not separately reported
Reported counties (1)
New London
- Bozrah Light & Power CompanyMunicipal · EIA 2089
Reported counties (1)
New London
- Mohegan Tribal Utility AuthorityPolitical Subdivision · EIA 49826Residential service not separately reported
Reported counties (1)
New London
- Farmington River Power CompanyInvestor Owned · EIA 6207Residential service not separately reported
Reported counties (1)
Hartford
Electricity suppliers / retail marketers 9
- Constellation NewEnergy, IncRetail Power Marketer · EIA 13374
Reported counties (0)
County coverage not reported in this source
- Town Square EnergyRetail Power Marketer · EIA 59059
Reported counties (0)
County coverage not reported in this source
- Direct Energy ServicesRetail Power Marketer · EIA 54820
Reported counties (0)
County coverage not reported in this source
- Think Energy, LLCRetail Power Marketer · EIA 65310
Reported counties (0)
County coverage not reported in this source
- XOOM Energy Connecticut, LLCRetail Power Marketer · EIA 57487
Reported counties (0)
County coverage not reported in this source
- Major Energy Electric ServicesRetail Power Marketer · EIA 56504
Reported counties (0)
County coverage not reported in this source
- North American Power and Gas, LLCRetail Power Marketer · EIA 58667
Reported counties (0)
County coverage not reported in this source
- Reliant Energy Northeast LLCRetail Power Marketer · EIA 57037
Reported counties (0)
County coverage not reported in this source
- Energy Plus Holdings LLCRetail Power Marketer · EIA 56265
Reported counties (0)
County coverage not reported in this source
On-site energy sellers 6
- Sunrun Inc.Behind the Meter · EIA 59647
Reported counties (0)
County coverage not reported in this source
- Tesla Inc.Behind the Meter · EIA 57313
Reported counties (0)
County coverage not reported in this source
- SunPower Capital, LLCBehind the Meter · EIA 59580
Reported counties (0)
County coverage not reported in this source
- Palmetto Solar, LLCBehind the Meter · EIA 66026
Reported counties (0)
County coverage not reported in this source
- Spruce FinanceBehind the Meter · EIA 59943
Reported counties (0)
County coverage not reported in this source
- EverBright, LLCBehind the Meter · EIA 66036
Reported counties (0)
County coverage not reported in this source
No matching providers in this reporting snapshot. Check the official directory above.
Official logo sources · Initials indicate a logo not yet verified. Municipal-owner emblems identify the owning city or village.
Source: EIA-861 final 2025 detailed data · Reporting year 2025. Names and reported counties are historical survey data, not a live address lookup. A county can have several providers, and a listing does not mean every resident can choose it. Small/territory-only reports may not identify residential service separately.
Credits, rebates, and other opportunities.
Check the program’s scope before comparing savings: a tax exemption, equipment rebate, loan and electricity-export payment provide different benefits. Funding, utility territory, income, equipment and installation dates can limit eligibility. Amounts below are not added together or deducted from product prices.
Build a project incentive checklist for Connecticut
1 state & utility record
Energy Storage Solutions
Connecticut Green Bank, Eversource and United Illuminating · Storage
New enrollments use a limited enrollment incentive and performance payments tied to battery dispatch under the April 2026 structure.
- Benefit
- Payment depends on eligibility, battery performance and current program terms; old upfront figures are not assumed.
- Who may qualify
- Eligible Eversource/UI customers and approved equipment/contractor configuration; municipal customers should confirm separate options.
- Before applying or buying
- Use an eligible contractor and complete program/interconnection review before assuming an incentive; ongoing dispatch participation affects compensation.
No matching records in this reviewed selection. Check the official program sources for more options.
Do not use legacy battery-upfront incentive figures for new enrollments: Energy Storage Solutions changed April 1, 2026. This is a curated starting list, not every local incentive or a guarantee of available funding.
Federal programs in every state
The federal rules below apply nationally. State-administered federal rebates still require the local program to be operating and your project to meet its conditions.
Residential Clean Energy Credit (25D)
Closed / endedNot available for new property placed in service after December 31, 2025. Do not assume a federal 30% credit for a new 2026 solar, wind, geothermal or battery installation.
IRS: Residential Clean Energy CreditEnergy Efficient Home Improvement Credit (25C)
Closed / endedThe federal home-efficiency credit, including qualifying heat-pump improvements, ended for property placed in service after December 31, 2025.
IRS: Energy Efficient Home Improvement CreditHOMES / High-Efficiency Electric Home Rebates
Eligibility / funding conditionsFederally funded home-energy rebates operate through participating local administrators. Check the state program’s launch, current funding, eligible measures and application requirements. This is not a blanket rooftop-solar rebate.
DOE: Home Energy Rebates ProgramWeatherization Assistance Program
Eligibility / funding conditionsIncome-eligible households may receive approved home-weatherization services through local agencies. This is assistance delivered through a program, rather than an automatic reimbursement for equipment you buy.
DOE: How to Apply for Weatherization Assistance
Permits and electrical codes.
Connecticut DAS publishes the state building-code framework, electrical requirements, interpretations and inspector contacts. Confirm the permit edition and local review requirements.
Use the adoption authority linked below to check the effective date and amendments. The newest published NEC edition is not automatically the edition adopted for your project.
Before ordering equipment.
Two conversations. Keep their answers separate.
Track permits and interconnection in a project
- Confirm the permit authority
Ask the city, county, or state electrical office which building, electrical and fire-code editions and amendments apply to this address. Request the solar/ESS permit checklist and inspection sequence.
- Confirm the utility process
Give the serving utility your proposed capacity, inverter model and operating mode. Ask which interconnection application, tariff, export limits, meter changes and written operating authorization apply.
- Document the exact equipment
Collect model-specific certificates, installation manuals, a one-line diagram, site/roof plans, and the battery/inverter pairing if storage is proposed. Check them with the permit authority and utility before ordering.
For the general permitting and inspection process: DOE: Permitting and Inspection for Rooftop Solar .
UL, NEMA, and system acceptance.
Different evidence, different scope.
Check the exact model and approved system configuration. A UL 1973 battery listing or UL 9540A fire-test report does not, by itself, establish UL 9540 certification of a complete storage system.
Open the UL & NEMA referenceScope and system-level certification: UL Solutions: Energy Storage System Testing and Certification .
Official sources.
Open the source for current forms, eligibility, tariffs, and adopted rules. Utility-specific examples apply to that provider.
