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An arrow graphic shows that Connecticut, is scheduled to reach a renewable portfolio standard 27% by 2020.

Carve-out: None
Tracking system: New England Power Pool Generation Information System (NEPOOL-GIS)

All electric electricity providers are subject to the Renewable Portfolio Standard (RPS) in Connecticut. Renewable energy resources are divided into three classes. Class I, which includes solar, is scheduled to reach 20% by 2020.

Connecticut requires the state's investor-owned utilities (IOUs) to buy Zero Emission Renewable Energy Credits (ZRECs) from large systems. Mid-market customers may be eligible for incentives, including Property Assessed Clean Energy (PACE) financing, from the Connecticut Clean Energy Fund. Connecticut's net metering policy allows for up to 2 MW of capacity, allowing for a full spectrum of midscale solar projects.

Latest Updates

  • In November 2016, the Connecticut Public Utilities Regulatory Authority (PURA) required suppliers to compensate customers for net excess generation at the wholesale cost for two annual banking periods starting on April 1st or October 1st as chosen by the customer.

Net Metering

Connecticut's Electric Distribution Companies (United Illuminating and Eversource) offer net metering for electricity generated from Class I renewable energy through a billing credit. In November 2016, the Connecticut PURA modified the state's net metering credit banking policy. Under this interim decision, suppliers are not obligated to serve net metering customers. Further, they are no longer required to cash out net excess generation for customers when they switch electric suppliers. Customers will be reimbursed for net excess generation at the wholesale cost for two annual banking periods starting on April 1st or October 1st as chosen by the customer. This is an interim decision which may be modified and the final decision is expected in August 2017.

System size limit: 2 MW

Aggregate cap: 5% of the utility's aggregate customer peak demand for investor-owned utilities

Credit: Not specified

RECs: Customers retain ownership of renewable energy certificates (RECs)

Meter aggregation: Virtual net metering allowed for state, municipal, and agricultural customers for up to 3 MW. Other customers may participate in virtual net metering as a "beneficial account" under a state, municipal, or agricultural host under certain conditions. Net excess generation from virtual net metering facilities is credited at the retail rate plus a declining percentage of the transmission and distribution charges billed to beneficial accounts.


Connecticut follows Federal Energy Regulatory Commission (FERC) Orders 792 and 792-A for small generator interconnection standards and procedures:

Eligible Systems Type of Interconnection
Inverter-based systems ≤10 kW Special process; Application fee of $100
Systems ≤2 MW Fast-track process; Application fee of $500
All other systems: ≤20 MW Study process which includes "additional process steps" for generators greater than 5 MW; Application fee of $1000; Additional study fees

System size limit: 20 MW

Liability insurance: Varies by system size and/or type; levels established by the PURA

External disconnect switch: Required

Third Party Ownership

Third-party solar power purchase agreements (PPAs) are allowed in Connecticut.

Community Solar

In 2015, Connecticut launched the Shared Clean Energy Facility Pilot program. The pilot program allows <6 MW of projects in Investor Owned Utilities (IOU) service territories. Virtual net metering permits up to 3 MW of capacity.

State Incentive Programs

Program Administrator Incentive
Connecticut Clean Energy Fund (CCEF) Connecticut Green Bank The Connecticut Green Bank has broad flexibility to use the CCEF to make green energy more accessible and affordable. Non-residential systems are eligible for Commercial Property Assessed Clean Energy (C-PACE) financing through the CCEF. C-PACE allows building owners to finance solar PV projects through a special assessment on their property value. The Green Bank also offers a solar lease program to non-residential customers.
Low-interest loans Connecticut PURA Long-term, low-interest financing is available for systems >50 kW, administered by Banc of America Leasing and Capital. Interest rates are fixed and determined at the time of the loan. Power purchase agreements are not eligible.

Utility Incentive Programs

The state of Connecticut requires the IOUs, Eversource (previously called Connecticut Light and Power) and United Illuminating Company, to offer 15-year standard contracts to buy ZRECs from solar projects. Both utilities offer to buy ZRECs from small solar projects (<100 kW) through a small ZREC tariff.

Utility Incentive Limitations
Eversource $81/ZREC <100 kW; expired January 1, 2017
United Illuminated Company (UI) $84/ZREC <100 kW; expired February 1, 2017
Eversource $326/ZREC >100 kW and <1 MW; expires May 1, 2018
United Illuminated Company (UI) $303/ZREC >100 kW and <1 MW; expires May 1, 2018


The list below provides some resources for each type of policy or program. Please reference and contact relevant authorities and local utilities for the most up-to-date and accurate information on state and utility policies and incentive programs.

Renewable Portfolio Standard

Net metering and interconnection

Community solar

Programs and incentives