CT · Connecticut

Connecticut sells solar differently.

Most New England states still run classic net metering: every kWh you export earns a credit, every kWh you import gets billed at retail, the meter quietly nets out at the end of the month. Connecticut closed that program to new enrollment and replaced it with the Residential Renewable Energy Solutions tariff, which has two paths. Option A still looks like net metering, with a new 2026 production charge. Option B is a "Buy-All" tariff: every kWh of solar production is sold to the grid at a fixed $0.3289/kWh for 20 years, while every kWh of household consumption is bought back at retail. For most 2026 installs, Buy-All wins on lifetime value. Layer Energize CT and the new ESS battery program on top, and Connecticut's stack ends up among the strongest in the country.

CT · Utilities

An inland Connecticut neighborhood in late afternoon: 1950s capes and center-hall colonials on a tree-lined cul-de-sac, distribution poles at the curb with transmission lines visible in the distance over a hardwood ridge

~$0.288/kWh

Avg residential electric rate

$0.3289/kWh

RRES Buy-All Tariff, 20-yr lock

$2,500/home

Energize CT ASHP rebate cap

The one most homeowners miss

Connecticut's Buy-All Tariff sells every kWh you produce at $0.3289 and buys it back at retail.

Under RRES Option B, the homeowner does not net out anything: 100% of solar production flows to the grid at a fixed $0.3289/kWh, locked for 20 years, while 100% of household consumption is purchased at the prevailing retail rate (currently around $0.288/kWh). Because the export rate is higher than the retail rate at enrollment, Buy-All produces a positive bill spread on every kWh of self-consumption avoided plus a premium on every kWh exported. Income-eligible households at or below 60% State Median Income receive an additional $0.055/kWh adder on the Buy-All path effective Jan 1, 2026.

Utility	Heat pumps	Solar	Storage	Insulation	Windows
Eversource Connecticut	4★	4★	2★	1
United Illuminating	3	3★	1	1

Utility · 1 of 2

Eversource Connecticut

Eversource is the larger of Connecticut's two electric IOUs, serving roughly 1.3 million customers across about 80% of the state, including Hartford, the eastern shoreline, and most of central and northern Connecticut. State efficiency programs run through Energize CT, a joint Eversource and United Illuminating administrator, so most rebate amounts are uniform statewide. Per-utility differences appear in retail rate (Eversource's typically runs slightly lower than UI's) and in legacy tariff transition windows.

Heat pumps · 4 programs

Energize CT Residential Energy Optimization RebateFlagship

$750/ton

Per-ton rebate for systems replacing oil, propane, gas, or electric resistance as the primary heat source. Installations must occur Jan 1 through Dec 31, 2026; application postmark deadline is Feb 27, 2027. Contractor must be in the Energize CT Heat Pump Installer Network.

Energize CT Optimization rebate →

Energize CT Air Source Heat Pump Rebate

Up to $2,500/home

Up to $2,500 per home for adding heat pumps to unconditioned space, replacing an existing heat pump, or for cooling-only installs. Stackable with the Optimization rebate when the install qualifies on both criteria, subject to combined-cap rules.

Energize CT ASHP rebate →

Smart-E Loan

0.99% APR · through Jun 30, 2026

Limited-time financing window at 0.99% APR through June 30, 2026, after which the rate steps back up. Contractor must be in the Energize CT Heat Pump Installer Network. Common pairing: finance the residual cost on a heat pump after the Optimization rebate clears.

Energize CT financing page →

Discounted heat pump electric tariff

Not yet offered

No CT-specific heat pump tariff at present. A heat-pump time-of-use rate may be in scope for the PURA Docket 22-08-01 follow-up, but nothing has cleared filing. [NEEDS RESEARCH, TOU rate for HP customers may be in PURA Docket 22-08-01 follow-up]

Eversource CT rate tariffs →

Solar · 4 programs

RRES Buy-All Tariff (Option B)Flagship

$0.3289/kWh · 20-yr lock

All production exported to the grid at a fixed $0.3289/kWh for 2026 enrollees, locked for 20 years. Homeowner buys all consumption back at retail. For most 2026 systems, Buy-All produces a higher lifetime credit than the Netting Tariff once the new $0.0402/kWh production charge is factored in.

RRES Program Manual (PDF) →

RRES Netting Tariff (Option A)

~$0.288/kWh · less $0.0402/kWh charge

Retail-rate credit (~$0.288/kWh) with monthly rollover. New for 2026: a $0.0402/kWh "Solar Energy Adjustment" charge applied to total production (was $0.005 in prior years). Locked 20 years. Legacy customers grandfathered at the old $0.005 charge through Dec 31, 2039.

RRES Program Manual (PDF) →

Net Metering (legacy)

Closed to new enrollment

Connecticut's classic 1:1 retail net metering tariff is closed to new enrollment and was replaced by RRES. Legacy net-metering customers retain their existing tariff treatment for the remainder of their original term.

Eversource CT net metering page →

Income-eligible adder (effective Jan 1, 2026)

+$0.035 Netting · +$0.055 Buy-All

Customers at or below 60% State Median Income receive an additional $0.035/kWh on the Netting Tariff, or $0.055/kWh on the Buy-All Tariff. Adder stacks on top of the base RRES rate for the full 20-year lock.

RRES Program Manual (PDF) →

Energy storage · 2 programs

Energy Storage Solutions (ESS)Flagship

$30–$130/kWh upfront + perf payments

Statewide battery program (Eversource + UI + CT Green Bank), restructured April 1, 2026 to a smaller upfront enrollment incentive plus multi-year performance payments. Enrollment incentive is $30/kWh standard or $130/kWh on grid-edge circuits. Performance years 1 to 5 pay $300 to $550/kW per year (income/community tier dependent); years 6 to 10 pay up to $130/kW per year. Standard customers receive $300/avg kW; underserved community $450/avg kW; income-eligible $550/avg kW. Sales-tax and property-tax exemptions apply to qualifying battery equipment.

CT battery incentives 2026 guide →

ConnectedSolutions (legacy, Eversource CT)

Closed to new · $225/kW legacy

Closed to new battery enrollments after Dec 1, 2023. Existing customers may stay at $225/kW until 2027 or transfer into ESS. New CT battery installs should enroll directly in ESS.

Eversource CT battery DR →

Insulation & weatherization · 1 program

Energize CT Home Energy Solutions

Co-pay by income tier

Comprehensive air-sealing and insulation program with co-pay structure that varies by income (no-cost or low-cost for income-eligible households). Typically required as a prerequisite for the Energize CT heat pump rebates. Same program runs across both Eversource CT and UI territory.

Energize CT homepage →

Windows & doors · no utility rebate

No utility rebate available

Eversource CT does not offer a windows/doors rebate. The federal 25C credit (up to $600/year for windows) expired Dec 31, 2025 with no utility replacement program. Inherent ROI (utility savings, comfort, resale value) is the case for the upgrade.

Utility · 2 of 2

United Illuminating (UI)

United Illuminating serves roughly 340,000 customers across 17 cities and towns in southwest Connecticut, including Bridgeport, New Haven, and the western shoreline. UI's retail rate generally runs slightly higher than Eversource's, which means each kWh of net-metering credit (or RRES Netting credit) is worth more on the UI side. Energize CT runs the rebate stack uniformly, so heat pump and weatherization amounts are identical to Eversource's; the difference shows up in solar economics and TOU schedule details.

Heat pumps · 3 programs

Energize CT Residential Energy Optimization Rebate

$750/ton

Same statewide program · identical to Eversource CT's offering.

Energize CT homepage →

Energize CT Air Source Heat Pump Rebate

Up to $2,500/home

Same statewide $2,500/home cap for adding to unconditioned space, replacing an existing heat pump, or cooling-only installs. Available to UI customers under the same rules as Eversource CT.

Energize CT ASHP rebate →

UI-specific HP electric tariff

Not yet offered

No UI-specific heat pump tariff at present. Like Eversource CT, UI customers should monitor PURA filings; nothing of this kind has cleared.

UI homepage →

Solar · 3 programs

RRES Buy-All Tariff (Option B)Best in CT

$0.3289/kWh · 20-yr lock

Same statewide RRES Buy-All structure: 100% of production exported at a fixed $0.3289/kWh for 2026 enrollees, locked 20 years; consumption purchased at UI retail. Because UI retail runs higher than Eversource's, the spread between Buy-All export and consumption cost is slightly tighter on the UI side, though Buy-All still beats Netting for most 2026 installs.

UI distributed generation page →

RRES Netting Tariff (Option A)

~$0.28/kWh · less $0.0402/kWh charge

Same statewide structure: retail-rate credit around $0.

UI distributed generation page →

Net Metering (legacy)

Closed to new enrollment

UI's classic net-metering tariff is closed to new enrollment and was replaced by RRES. Legacy net-metering customers retain their existing tariff treatment for the remainder of their original term.

UI distributed generation page →

Energy storage · 1 program

Energy Storage Solutions (ESS)

$30–$130/kWh upfront + perf payments

Same statewide ESS structure as Eversource CT: enrollment incentive of $30/kWh standard or $130/kWh on grid-edge circuits, plus performance years 1 to 5 at $300 to $550/kW per year and years 6 to 10 at up to $130/kW per year. Sales-tax and property-tax exemptions apply. Enroll through UI's ESS portal after battery commissioning.

UI Energy Storage Solutions page →

Insulation & weatherization · 1 program

Energize CT Home Energy Solutions

Co-pay by income tier

Same statewide Energize CT program.

Energize CT homepage →

Windows & doors · no utility rebate

No utility rebate available

UI does not offer a windows/doors rebate. Federal 25C credit expired Dec 31, 2025; no utility replacement.

Connecticut sells solar differently.

Connecticut's Buy-All Tariff sells every kWh you produce at $0.3289 and buys it back at retail.

Who offers what.

Eversource Connecticut

United Illuminating (UI)

Want the math run for your specific CT address?