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 manuals 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.

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¢.

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

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 roll 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. You can request a cash-out of accumulated credits once a year, starting on your first anniversary. The Solar Energy Adjustment is deducted from all production.

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. Paid quarterly as a direct payment rather than a bill credit.

Buy-All at 32.89¢ against a state average retail rate of 27.37¢ looks attractive on paper. 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 specific rate class and how your usage lines up with production — this is a genuine "model both" situation, not a foregone conclusion.

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 when the base REC rate is zero.

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 generating systems are exempt from Connecticut's 6.35% sales and use tax under CGS §12-412(117). It's automatic at the point of sale. On a $30,000 system that's roughly $1,900 you never pay. If an installer's quote shows sales tax on the solar hardware, ask why.
• Property tax exemption. Under CGS §12-81(57)(A)(i), 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. There's a condition people miss — the estimated annual production can't exceed the estimated annual load at that location, measured as of installation. Some towns apply it automatically at permit; others want the M-44 form filed with the assessor by November 1.
• 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 350 MW target; RRES replaced it.
• No SREC market. Connecticut has nothing equivalent to New Jersey's SREC-II or Massachusetts' SMART adder. 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. 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 1.99% rate running through December 31, 2026 is for heat pump installations only. Solar is financed at the standard APR, currently 6.99%–7.99% depending on term. Any page advertising a sub-2% Smart-E rate for solar is misreading the program. 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: 11.4 kW (Connecticut marketplace average)
• Installed price: $2.67/W → $30,438 (sales-tax exempt, so nothing gets added)
• Annual production: 1,200 kWh per kW installed → 13,680 kWh/year (this is a modeled estimate, not a verified state figure — run your own address through NREL's 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 $11,000 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 — $9,131 on this system — which dropped their net cost to $21,307 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, and it still beats twenty-five years of Eversource bills at 27¢ and rising. But anyone telling you the math is unchanged is not doing the math. Our 2026 cost breakdown shows how installers build these quotes.

Two things this calculation deliberately leaves out, both of which push in your favor: Connecticut electricity rates have historically risen a few percent a year, and this assumes no battery and no income adders.

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. The old design paid roughly $250/kWh up front. The new one pays much less at installation and much more over ten years:

The program's own comparison for a 20 kW / 30 kWh system: a standard customer used to get $6,375 up front plus $11,627 in performance payments. Now it's $900 up front plus roughly $18,000 in performance — more money overall, arriving much later, and contingent on your battery actually showing up during dispatch events. There are roughly 50 summer events and 5 winter events a year, and payments are calculated from real inverter data, not nameplate capacity.

"Grid-Edge" means you're on one of the circuits with the worst outage history since 2012 — the top 10% by frequency or duration. Eversource and UI each publish an address lookup map. If you're on one, your enrollment incentive is 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. Our solar battery guide works through the general math.

Two Things That Quietly Cost Connecticut Homeowners Money

Oversizing the system. Connecticut caps RRES at 25 kW nameplate, which almost no home approaches. The binding constraint is elsewhere: the property tax exemption under §12-81(57) requires that estimated annual production not exceed estimated annual load. Build a system meaningfully bigger than your usage and you can put that exemption at risk — while also paying the 4.02¢ adjustment on 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 — $163 at Eversource, $200 at UI. 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, that's worth confirming with your installer in writing before a year boundary.

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 (CGS §12-412(117)) and an exemption from property tax on the value the system adds (CGS §12-81(57)). The 30% federal residential credit expired December 31, 2025.

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. For 2026 applicants it's 4.02¢/kWh, up from 0.5¢ in 2025. It's locked for your 20-year term.

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 retail rate, credits rolling over month to month.

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 and is the structure most lease and PPA companies use. 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 July 2026, putting an average 11.4 kW system near $30,400 before incentives, with typical quotes ranging from roughly $26,000 to $35,000. No sales tax is added.

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 somewhere around nine and a half years on our assumptions, against panels warrantied for 25. Connecticut electricity averaged 27.37¢/kWh in May 2026, roughly 48% above the national average of 18.44¢, and that spread is what carries the math now.

I applied in 2025. Does the new charge apply to me?
No. Your rates were fixed at application and hold for the full 20-year term. The 4.02¢ adjustment applies only to projects whose completed applications land in 2026.

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 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 ESS 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 Net Metering by State (2026) guide covers how every state credits solar exports, and Solar Incentives 2026 covers what survived federally. 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, eligibility, application fees: CT PURA — RRES Program (Program Manual v2026.1, Docket No. 25-08-02, Order 23). Battery incentives: Energy Storage Solutions — April 1, 2026 program changes. Electricity rates: U.S. EIA Electric Power Monthly, Table 5.6.A, May 2026. Installed cost: EnergySage Connecticut local data, July 2026. Sales tax exemption: CGS §12-412(117), CT DRS. 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.