United Illuminating (UI) solar export rate
What United Illuminating (UI) pays for power exported from rooftop solar in Connecticut, with the source and the date it was checked.
No single rate — formula based
RRES Netting: currently applicable retail rate inclusive of Standard Service supply charges; 2026 REC rate $0.000/kWh; 2026 Solar Energy Adjustment $0.0402/kWh. Buy-All 2026 rate: $0.3289/kWh.
United Illuminating (UI) · Connecticut
Residential RRES projects are up to 25 kW AC and receive a 20-year tariff commitment; legacy net metering is closed to new enrollment.
Source: eversource.com
Full United Illuminating (UI) detail →Connecticut rules that apply to United Illuminating (UI)
The state framework sets the default. Where United Illuminating (UI) pays something different, the utility tariff governs and is what the card above reports.
| Compensation mechanism | Residential Renewable Energy Solutions (RRES): customer selects a 20-year Buy-All tariff or a 20-year Netting tariff. Netting nets production against consumption and credits exported monthly net excess generation on the bill; Buy-All pays a fixed total incentive for all production. |
|---|---|
| Export rate | Netting export rate is a formula, not a single statewide dollar figure: the customer's currently applicable retail rate inclusive of Standard Service energy supply charges. For 2026 Netting, the REC rate is $0.000/kWh for both Eversource and UI; a $0.0402/kWh Solar Energy Adjustment applies to 2026 Netting production. |
| Rate effective | RRES Netting formula applies to projects with the applicable program-year application; the current manual is Version 2026.1 effective January 1, 2026, and the 2026 values apply to projects applying January 1 through December 31, 2026. |
| Credit rollover | Monthly excess monetary on-bill credits carry forward from month to month and may offset customer, supply, and delivery charges. |
| Credit expiration | Credits are not given a routine calendar expiration in the cited RRES manual; accrued credits may be cashed out when the customer closes the EDC account. The 20-year tariff term is separate from monthly credit carry-forward. |
| Annual true-up | No annual true-up date is specified for current RRES Netting. Customers may request a monetary on-bill credit cash-out no more than once annually, with eligibility beginning on the one-year anniversary of Approval to Operate/Approval to Interconnect; account-closing cash-out is also provided for accrued credits. |
| Aggregate program cap | No single statewide aggregate cap for current residential RRES enrollment is stated in the cited current manual. The statute separately sets annual procurement ceilings for the broader tariff/procurement categories: up to 10 MW/year for the §16-244z(a)(2)(A) category, 100 MW/year for (B), and 50 MW/year for (C) shared clean energy facilities; these are not a 25 kW residential-system cap. |
| Program status | open for 2026 RRES applications: the current manual publishes 2026 incentive values and the Eversource interconnection page provides an active application process. |
| Grandfathering | Residential systems operational under legacy net metering, and systems whose interconnection application was submitted to Eversource or UI before January 1, 2022, are grandfathered under the former net-metering program; current net-metering customers remain on that rate until the system is removed. |
| Regulator | Connecticut Public Utilities Regulatory Authority (PURA); the program is administered by Eversource Energy and The United Illuminating Company (UI). |
| Governing rule | Conn. Gen. Stat. §16-244z, implemented for RRES through Public Act 19-35 and PURA's Docket No. 20-07-01 decision; the program manual also identifies the Connecticut Class I RPS eligibility requirement. |
Other Connecticut utilities
- Eversource (CT)Formula basedRRES Netting: currently applicable retail rate inclusive of Standard Service supply charges; 20