Connecticut Solar Incentives in 2026

Two things changed for Connecticut homeowners this year, and neither one got much attention.

On December 17, 2025, state regulators approved the 2026 rates for Connecticut's solar tariff program. Buried in that decision was a charge called the Solar Energy Adjustment, which went from half a cent per kilowatt-hour to just over four cents. It applies to every kilowatt-hour your panels make, for the next twenty years, and only to people who apply in 2026.

Then on April 1, the state's battery incentive was rebuilt from the ground up — far less money at installation, considerably more paid out over ten years.

Most Connecticut solar pages you'll find today still quote the old numbers for both. This page uses the current ones, pulled from the program manual and the regulator's decision themselves.

What Actually Changed on January 1

Connecticut hasn't had traditional net metering since the end of 2021. It has the Residential Renewable Energy Solutions program — RRES — run by Eversource and United Illuminating under the Public Utilities Regulatory Authority. You pick a tariff when you apply, and the rate you get is locked for 20 years from the day your system is approved to operate.

The rates are reset every year. Here's how the residential numbers have moved:

Source: RRES Program Manual v2026.1, PURA Docket No. 25-08-02, Order 23. Rates are identical for Eversource and United Illuminating.

The Buy-All rate went up. That part is good news, and it's the number most articles lead with.

The Solar Energy Adjustment went up eight-fold. That's the part that matters more for most homeowners, because it lands on the Netting tariff — the option the large majority of Connecticut homeowners choose.

A detail worth being precise about: the adjustment is charged on total production measured at your production meter, not on the portion you export. Whether a kilowatt-hour powers your dishwasher or goes out to the grid, it pays the 4.02¢. Most coverage of this charge gets that wrong, and it roughly triples the number.

If you applied in 2025, you're locked at half a cent for your full 20 years. Nothing about the 2026 decision touches you.

Where 4.02¢ Came From — and Why United Illuminating Got a Discount

This charge wasn't PURA's idea. Public Act 25-173, "An Act Concerning Energy Affordability, Access, and Accountability," directs PURA to establish a non-bypassable charge on the Netting tariff of at least 3.25¢/kWh beginning January 1, 2026, and to adjust the Buy-All rate to be substantially similar in value. The floor was set by the legislature; PURA set the number above it.

How it got to 4.02¢ is worth knowing, because it tells you something about where this goes next. PURA's residential tariff model returned −$0.0402/kWh for third-party-owned systems in Eversource territory at a 10% target return. PURA used third-party-owned systems as the baseline because roughly two-thirds of RRES systems deployed in 2024 and the first half of 2025 were TPO — leased or PPA, not homeowner-owned.

The same model returned −$0.0927/kWh for United Illuminating. PURA declined to apply it, writing that an eight-cent single-year jump "would run counter to the goal of gradualism," and set UI at 4.02¢ to match Eversource.

Read that plainly: by the regulator's own modelling, the charge in UI territory is currently held about five cents below what the model produced, on gradualism grounds. That is not a promise about future years, and we're not going to predict one. But if you're in UI territory and you've been weighing whether to apply this year or next, that is the single most relevant fact on this page, and it is in the decision document.

Netting or Buy-All — The Choice You Make Once

You pick one at application. There's no switching later, and it runs for two decades.

Netting Tariff. Your panels serve your home first. Anything left over is credited to your bill at your currently applicable retail rate, including the Standard Service supply portion. Credits are calculated monthly, roll forward month to month, and can be applied against supply and delivery charges — which matters in Connecticut, where delivery is a large slice of the bill. The Solar Energy Adjustment is deducted from all production.

One rule people get wrong: Netting credits are not cashed out annually. Under the 2026 program manual, accumulated Netting credits cannot be cashed out until you close your electric account — and with United Illuminating you have to specifically request it at closure. Credits are bill offset, not income. Building a bank of credits you'll never spend is money you don't get back, which is the real argument against oversizing here.

Buy-All Tariff. You sell 100% of your production to the utility at $0.3289/kWh, fixed for 20 years, and buy back everything your home uses at the normal retail rate. No Solar Energy Adjustment applies. Credits are cashed out annually on request, and direct payments are made quarterly with a $5 minimum, smaller balances rolling forward.

Buy-All at 32.89¢ against a state average retail rate of 27.37¢ looks attractive on paper, and in 2026 it also dodges the 4.02¢ charge entirely. In practice it's the structure most lease and PPA companies build around, because a fixed 20-year payment stream is easy to finance. For an owner-occupier the comparison depends on your rate class and how your usage lines up with production — this is a genuine "model both" situation, and in 2026 more genuinely so than in any prior year.

There are two income-based adders that most homeowners won't qualify for but should know exist. Households at or below 60% of State Median Income get an extra $0.035/kWh on Netting or $0.055/kWh on Buy-All. Homes in an economically distressed municipality get $0.0175 or $0.0275 respectively. These apply even though the base REC rate is zero.

System size is capped at 25 kW AC across all qualified systems at a one-to-four-family property. Paired battery storage does not count toward that cap.

The Full Connecticut Incentive List for 2026

What exists:

• RRES Netting or Buy-All tariff — the primary financial mechanism, 20-year lock, described above.
• Sales tax exemption. Solar electricity generating systems are exempt from Connecticut's 6.35% sales and use tax under CGS §12-412 — and critically, the exemption covers installation labor as well as equipment (DRS Special Notice 2007(7)). It's applied at the point of sale; your contractor takes form CERT-140. On a $31,158 system that's roughly $1,980 you never pay. If an installer's quote shows sales tax on the solar work, ask why.
• Property tax exemption. Under CGS §12-81(57)(A), a Class I renewable system installed for private residential use on a one- to four-unit dwelling is exempt from property tax on the value it adds — permanently, with no expiry for the residential category. Two conditions people miss: the system must have been installed on or after October 1, 2007, and estimated annual production can't exceed the estimated annual load at that location. Some towns apply it at permit; others want OPM form M-44 filed with the assessor by November 1, and filing late waives it for that assessment year.
• Energy Storage Solutions — battery incentives, restructured in April. Details below.
• Smart-E Loan through the Connecticut Green Bank. Up to $50,000, unsecured, terms to 15 years, no prepayment penalty, and up to 25% of the loan can go toward non-energy work like a roof replacement ahead of the install.

What doesn't exist:

• No Connecticut state income tax credit for solar.
• No state rebate. The old Residential Solar Investment Program closed in 2021 when it hit its target; RRES replaced it. A system that already took an RSIP incentive can't enroll in RRES.
• No SREC market. Connecticut has nothing equivalent to New Jersey's SREC-II or Massachusetts' SMART adder. In fact the RRES "REC" rate on the Netting tariff is $0.000 — production earns you bill offset, not a separate payment.
• No federal residential tax credit. The 30% Section 25D credit expired December 31, 2025 under the One Big Beautiful Bill Act. It does not exist for a cash or financed purchase in 2026. PURA's own Year 5 decision builds its 2026 rates around "the loss of the ITC for customer-owned systems" — the state regulator has it on the record, even if a number of Connecticut solar pages are still running payback math with a 30% credit baked in. If a quote shows "after federal credit," that's a 2025 number. See our 2026 tax credit guide.

One clarification on the Smart-E Loan, because it's a common source of confusion: the promotional low rate running through December 31, 2026 is for heat pump installations only. Solar is financed at the standard APR. Any page advertising a sub-2% Smart-E rate for solar is misreading the program — confirm the current rate with a participating lender. Our financing options guide covers how that compares to a lease or PPA.

Running the Numbers on an Average Connecticut System

Here's the math on a typical install, with every assumption stated so you can swap in your own.

Assumptions:

• System size: 11.68 kW (Connecticut marketplace average, EnergySage, August 2026)
• Installed price: $2.67/W → $31,158 (sales-tax exempt, so nothing gets added)
• Annual production: 1,200 kWh per kW installed → 14,016 kWh/year (a modeled estimate, not a verified state figure — run your own address through the free PVWatts tool)
• Retail electricity rate: 27.37¢/kWh (Connecticut residential average, EIA, May 2026)
• Netting tariff, no income adders, no rate escalation assumed

Year one, applying in 2026:

Simple payback: about 9.5 years.

Now the same system for someone who applied in 2025, when the adjustment was half a cent:

Simple payback: about 8.3 years.

So the adjustment alone costs roughly 1.2 years of payback and about $9,900 in nominal dollars across the 20-year term.

The larger gap is the federal credit. That same 2025 buyer also took a 30% Section 25D credit — $9,347 on this system — which dropped their net cost to $21,811 and their payback to about 5.8 years.

That's the honest comparison: an average Connecticut system that paid for itself in under six years in 2025 takes closer to nine and a half in 2026. It still pays for itself inside the panel warranty, and 27¢ power is still 27¢ power. But anyone telling you the math is unchanged is not doing the math. Our 2026 cost breakdown shows how installers build these quotes.

Two notes on what this calculation leaves out. In your favour: no battery and no income adders are included. Against the usual sales pitch: we assumed no rate escalation, and we'd point out that Connecticut residential rates actually fell 13.4% year over year — 31.59¢ in May 2025 to 27.37¢ in May 2026, per EIA. Connecticut solar works on today's rate. Be sceptical of any proposal whose savings depend on rates climbing every year for 25 years.

Want these numbers for your actual roof and utility? Get a free, no-obligation Connecticut estimate →

Why the Battery Question Is Different Here

In most states with reduced solar compensation — California under NEM 3.0, Arizona, Illinois — the case for a battery is arbitrage. Exports earn a few cents, retail power costs five times that, so you store your production and use it yourself.

Connecticut's Netting tariff doesn't work that way. Exports are credited at the full retail rate, and the Solar Energy Adjustment hits all production regardless of where it goes. A kilowatt-hour you store and use is worth almost exactly what a kilowatt-hour you export is worth. There is no meaningful arbitrage to capture.

Which means the battery decision in Connecticut rests on two other things: outage protection, and the Energy Storage Solutions program.

ESS was restructured effective April 1, 2026, and the change was substantial — much less at installation, much more over ten years:

Source: Energy Storage Solutions, program changes effective April 1, 2026 (PURA Docket No. 25-08-05).

Performance payments run for ten years and are paid twice a year, calculated from your battery's actual measured contribution during dispatch events — real inverter data, not nameplate capacity. If the battery isn't available when called, that period doesn't pay.

"Grid-Edge" means you're on one of the circuits with the worst outage history — customers who lose power more often than average. Eversource and UI each publish an address lookup. If you're on one, your enrollment incentive is more than four times higher, and you're also the household most likely to actually use the backup.

If you were counting on a large check at installation, that structure is gone. If you're going to be in the house for a decade and you're willing to let the utility call on the battery, the new design pays more in total — later, and conditionally. Our solar battery guide works through the general math.

Three Things That Quietly Cost Connecticut Homeowners Money

Oversizing the system. Two separate rules bite. The property tax exemption under §12-81(57) requires that estimated annual production not exceed estimated annual load — build meaningfully bigger than your usage and you put that exemption at risk. And because Netting credits can't be cashed out until you close your account, banked credits you never spend are simply gone. Meanwhile you're paying 4.02¢ on every kilowatt-hour of the production you didn't need.

Timing the application. Your rate is set by the year your completed application lands, not the year the panels go up. Applications are complete once every required field and document is in and the fee is paid. A project that starts in December and finishes its paperwork in January gets the following year's rates. Given that the adjustment moved eight-fold in one annual review, get the target application year confirmed with your installer in writing before a year boundary.

Assuming the rate resets when you sell. It doesn't, and that's good news. Under the program manual, a buyer moving into a home with an existing qualified system receives the same rate originally assigned to that system. A 2024-vintage system carries a zero Solar Energy Adjustment to its next owner — a genuine, transferable asset that's worth naming in a listing.

Frequently Asked Questions

Does Connecticut have a solar tax credit in 2026?
No state income tax credit. Connecticut's tax benefits are a full exemption from the 6.35% sales tax on both equipment and installation labor (CGS §12-412) and a permanent exemption from property tax on the value the system adds to a home (CGS §12-81(57)). The 30% federal residential credit expired December 31, 2025 and does not exist in 2026.

What is the Solar Energy Adjustment?
A per-kilowatt-hour charge on RRES Netting tariff customers, applied to all solar production measured at the production meter — not just the portion you export. For 2026 applicants it is 4.02¢/kWh, up from 0.5¢ in 2025 and zero in 2024. It is locked for your 20-year term. Buy-All customers do not pay it.

Why did the Solar Energy Adjustment go up eight-fold in 2026?
Public Act 25-173 requires PURA, beginning January 1, 2026, to set a non-bypassable charge on the Netting tariff of at least 3.25¢/kWh. PURA's rate model returned 4.02¢ for third-party-owned systems in Eversource territory, and PURA applied that figure. It set the same 4.02¢ for United Illuminating even though its model returned 9.27¢ there, reasoning that an eight-cent single-year jump would run counter to the goal of gradualism.

Does Connecticut still have net metering?
Not in the original form — that closed to new residential customers at the end of 2021. The RRES Netting tariff is its replacement and behaves similarly: exports credited at your currently applicable retail rate, with credits rolling over month to month against both supply and delivery charges.

Which tariff should I pick, Netting or Buy-All?
Most homeowners choose Netting. Buy-All pays a fixed $0.3289/kWh for everything you generate, carries no Solar Energy Adjustment, and is the structure most lease and PPA companies use. Netting credits cannot be cashed out until you close your utility account, while Buy-All pays out in cash quarterly. Because the choice is locked for 20 years, model both against your actual usage before you apply.

How much do solar panels cost in Connecticut?
About $2.67 per watt installed as of August 2026, putting an average 11.68 kW system near $31,158 before incentives. No sales tax is added — Connecticut exempts both the equipment and the installation labor.

Is solar still worth it in Connecticut without the federal credit?
For most homes with decent roof exposure, yes — simple payback on an average system runs around nine and a half years on our stated assumptions, against panels warrantied for 25. Connecticut electricity averaged 27.37¢/kWh in May 2026, about 48% above the national average of 18.44¢ and the 8th highest in the country, and that spread is what carries the math now.

I applied in 2025. Does the new charge apply to me?
No. Once a project receives a Statement of Qualification naming a rate, that rate does not change for the 20-year tariff term. A 2025 enrollee stays at 0.5¢ and a 2024 enrollee at zero. The 4.02¢ adjustment applies only to projects whose completed applications land in 2026. If you buy a house with an existing system, you inherit the rate originally assigned to that system.

Does a lease or PPA still get a federal credit?
Indirectly, and not as 30% off your price. The residential credit (25D) is gone. The commercial credit (48E) survives for company-owned systems, so a lease or PPA provider may claim it and pass some of that value through as a lower monthly rate — how much, if any, is up to them. That's a different product from owning your system: you don't get the asset, and the savings profile is different. Compare a PPA quote against a cash or loan quote on total 20-year cost, not on the headline monthly payment.

Do I need a battery to make solar work in Connecticut?
No. Because exports are credited at retail and the production charge applies to all generation either way, storage doesn't unlock extra rate value here the way it does in California or Arizona. Batteries are worth it in Connecticut for outage protection and for the Energy Storage Solutions performance payments, not for arbitrage.

Keep Going

Compare Connecticut against its neighbours: Rhode Island, Massachusetts, New York, and New Hampshire. For the nationwide picture, our Solar Break-Even Map ranks all 51 jurisdictions by payback, and Net Metering by State (2026) covers how every state credits solar exports. Weighing the decision generally? Start with Is Solar Worth It in 2026, then use the Solar Quote Comparison Tool and check installers against our vetted installer list. Full state index: Solar by State.

Sources

RRES tariff rates, Solar Energy Adjustment, cash-out rules, eligibility and transfer on sale: CT PURA — RRES Program, Program Manual v2026.1 (Docket No. 25-08-02, Order 23). Rate derivation, the United Illuminating gradualism decision, Public Act 25-173's 3.25¢ floor, and the ITC rationale: PURA Docket No. 25-08-02, Year 5 Decision, December 17, 2025. Battery incentives: Energy Storage Solutions — April 1, 2026 program changes (PURA Docket No. 25-08-05). Electricity rates: U.S. EIA Electric Power Monthly, Table 5.6.A, data month May 2026. Installed cost and system size: EnergySage Connecticut local data, August 2026 (marketplace quote data). Sales tax exemption: CGS §12-412; CT DRS Special Notice 2007(7). Property tax exemption: CGS §12-81(57); CT OPM Form M-44. Financing: EnergizeCT Smart-E Loans. Federal credit expiration: One Big Beautiful Bill Act, Section 25D. Payback figures are Solar Energy Nerds calculations from the sources above, with assumptions stated in full.