Solar in Connecticut costs about $2.77 per watt, so the 6.45 kW system a typical home needs runs about $17,867, and with no federal credit that is also what you pay. What changes your deal most is your utility: Eversource and United Illuminating charge different solar fees and bill different rates for the power your panels replace.
Check Connecticut solar prices for your address
Your utility territory, your roof’s age and how you pay set the final number. Your ZIP code shows local prices and installers.
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- Your details come lastFour quick questions about your home first. Name, email and phone only at the end.
Eversource or United Illuminating: the utility behind your Connecticut price
A new system in either territory joins the Residential Renewable Energy Solutions (RRES) program at interconnection. Your utility sets both the fees you pay to connect and the rate your panels save you from buying.
Eversource (CL&P)
Standard all-in residential rate from July 1, 2026. Solar fees: a $163 application and a $183 Form 2S meter.
United Illuminating
Standard all-in residential rate from July 1, 2026. Solar fees: a $200 application and a $348 meter.
How the two rates are builtEach rate adds the utility’s published delivery charges, set out in the Eversource Rate 1 tariff, to the Standard Service supply rate the Public Utilities Regulatory Authority approved on May 20, 2026: 11.58¢ for Eversource and 11.95¢ for United Illuminating. The Governor of Connecticut said the change would “lower residential electricity rates throughout Connecticut starting May 1, 2026.”
29.76¢ is not your rateThe statewide 29.76¢ per kWh average is a figure for comparing states. Neither utility bills you at it, so compare solar against your own utility’s rate.
Connecticut solar prices from 6 kW to 12 kW
Connecticut’s competitive installed price is $2.77 per watt, or $2,770 per kW. That ranks 16th among the states. A 6 kW system runs about $16,620 and a 12 kW system about $33,240, before financing. For the national picture, see our cost comparisons for all 50 states.
Solar-only figures are the $2.77 per watt Index price times the size. Battery figures add a modeled $13,500 for one 13.5 kWh unit at $1,000 per kWh. Roof, equipment, installer and financing change the contract total.
Why 6.45 kW fits a typical homeThe system is sized for a household using 695 kWh a month. Each kW of panels makes about 1,294 kWh a year in Connecticut, from 4.77 peak sun hours a day. Size follows your use, not your roof area.
What quotes usually showTwo Connecticut marketplace price surveys sit at $2.67 and $2.91 per watt. Both fall inside the $2.30 to $3.60 national range, so $2.77 is a fair benchmark to hold a written quote against.
No federal credit, but Connecticut keeps tax off the invoice
In 2026 the price on a Connecticut quote is the price you pay. The state’s tax breaks lower that price at purchase. None of them arrive later as a check.
The federal homeowner credit is $0Section 25D ended for systems you own that are completed after December 31, 2025. The completion date is what counts: a deposit paid in 2025 does not bring the credit back. Some price pages and proposals still subtract 30%, so check every “net cost” box against the completion date.
Conn. Gen. Stat. §12-412(117) and Form CERT-140 keep the tax off equipment and labor. A correct quote shows no sales tax. Do not subtract the $1,135 again.
CT Department of Revenue ServicesThe value a home renewable-energy system adds is exempt from property tax. How you file varies by town.
For a system you own completed in 2026. Your net cost is the full contract price.
IRSThe third-party owner may claim it. Any value you see is priced into the contract rate. You do not claim 48E on your own return.
Public Law 119-21The RRES tariff, the storage program, income adders and tax treatment are laid out in Connecticut solar incentives in 2026.
What the net-cost box should say in 2026For a system you own: gross installed cost = the full contract price. Section 25D credit = $0. Net cost after the federal credit = the full contract price.
Two jobs, kept apartThe sales-tax exemption changes the invoice. The RRES tariff changes what your future output is worth. Keeping them separate makes a proposal easier to check.
Old roofs and coastal wind: what adds to a Connecticut quote
Connecticut’s older housing and coastal design rules make a site review essential. The base price covers the solar install. Your contract can also carry roof and structural work.
+What pushes a Connecticut quote up
- A roof near the end of its lifeThe largest documented building adder. Removing and reinstalling the array for a later re-roof costs real money.
$1,500 to $4,000 - Coastal towns on Long Island SoundStronger wind and flood-zone requirements under the 2022 State Building Code (ASCE 7-22, with town values in Appendix AY).
- Slate, multi-plane and older roofsThey take more labor to inspect and mount. There is no single statewide dollar figure, so the installer should spell out the scope in writing.
−What keeps it in check
- Re-roofing firstIf the roof has under ten years left, replacing it before solar avoids paying to move the array midway through its life.
- The sales-tax exemptionAbout $1,135 stays off the invoice on the typical system.
- Comparing the same scopeConnecticut has an active installer market. Quotes for the same size, equipment and roof work show who is padding the price.
Get two roof answers in writingThe proposal should state the roof’s remaining life, and whether the installer will remove and reinstall the system under a workmanship or roofing agreement. If neither is written down, a big future cost is left open.
Cash, Smart-E loan or lease: pricing each path in Connecticut
Financing can move the price more than the gap between Connecticut installers. Put the cash price next to the total amount financed, with the rate, dealer fee and payment schedule shown separately.
Pay cash
You own the system
Upfront
The full contract price, about $17,867 for 6.45 kW.
Monthly
Nothing.
Credits
No federal credit. The sales-tax exemption is already in the price.
Watch out for
A low cash price that leaves out interconnection, permit work or a needed roof repair.
The shortest contract and the fewest places to hide cost.
Solar loan
You own the system
Upfront
Compare the amount financed with the cash price. The gap is where fees hide.
Monthly
Connecticut Green Bank Smart-E loans: 6.99% to 7.99% APR, no dealer fees, by term and qualification.
Credits
No federal credit, so no 30% refund to make a big first-year payment.
Watch out for
A low advertised rate paired with a higher financed amount.
Ownership without cash, if the amount financed stays close to the cash price.
Lease or PPA
The provider owns the system
Upfront
Set by the contract. Both are legal in Connecticut.
Monthly
A starting payment that can rise with an annual escalator.
Credits
The provider may claim Section 48E. You only see it in the contract rate.
Watch out for
Escalators, transfer terms, maintenance duties and the buyout schedule.
Compare the total with cash and a loan before signing.
Ask the lender for five numbersThe cash price with no financing. The amount financed on the loan documents. The dealer fee in dollars. The APR and term. Any prepayment terms.
$4.0 per watt is not Connecticut’s priceLawrence Berkeley National Laboratory’s 2025 Data Update reports a $4.0 per watt national median for 2024 installs: national, lagged and from the 30%-credit era. The same data shows $3.5 per watt for cash buyers and $4.7 with a loan. That split shows how financing inflates a price. It does not replace Connecticut’s own figure.
Who controls the RRES payments on a leaseThe tariff value is priced into the lease payment or PPA rate. Confirm in writing who controls each payment. See how Connecticut zero-down solar options change the total cost.
What a home battery adds in Connecticut
Treat the battery figure as a planning allowance, not a quote. Power rating, backup setup, electrical work and brand all change it.
Under RRES, Netting credits exports at full retail before the Solar Energy Adjustment, and Buy-All buys all production at a fixed tariff. So moving solar power into the evening does not guarantee savings. A battery’s value comes from Energy Storage Solutions incentives and backup power. Program terms change by enrollment category and funding tranche, so ask the installer to list capacity in kWh, power in kW, installed price, eligible incentive and net price on separate lines.
When a Connecticut house is a poor fit for solar
High electricity rates do not fix a bad roof, low use or a short stay. Think twice if one of these is true:
- A roof with under ten years left. Paying to remove and reinstall the array can erase the value of installing now. Re-roof first, or do both under one scope.
- A move within five years. You may leave before ownership has earned back the upfront price, especially with a loan balance attached.
- Low electricity use. The RRES application and meter fees do not shrink with size, and the monthly customer charge stays on the bill.
- Heavy shade or limited roof area. 6.45 kW assumes an unshaded roof at the statewide production rate. Ask for a site-specific shade report.
- Wallingford or Norwich utility service. Municipal utilities sit outside the Eversource and UI RRES program. The RRES figures here do not apply, so confirm terms directly.
Whether solar is worth it in Connecticut depends on payback, long-term savings and the choice between Netting and Buy-All.
Eight questions that take a Connecticut quote apart
A good quote is easy to rebuild from its parts. If the salesperson cannot separate equipment, utility fees, financing, roof work and tax, the monthly payment tells you little. Ask these before signing:
- What is the cash price at the same size and equipment? Keep the setup fixed so financing is the only thing that changes.
- What is the total amount financed? Compare it with the cash price and ask about every fee in the gap.
- Are the RRES application and meter fees included? They total $346 on Eversource and $548 on United Illuminating.
- Is the 6.35% sales-tax exemption already reflected? A tax-free invoice should not subtract $1,135 again as a later benefit.
- How many years are left on the roof? Who pays to remove and reinstall the system if the roof needs work?
- Which production figure supports the size? The statewide reference is 1,294 kWh per kW a year and 695 kWh a month; the proposal should also use your address and bills.
- Which Connecticut license covers the work? Solar electrical work needs a PV-1 contractor or E-1/E-2 electrical license. Check it on the DCP solar licensing page.
- Who files RRES, and which tariff is on the application? Netting and Buy-All are different 20-year elections. The installer should explain the choice before it is filed.
Compare the same scope across firms. Compare Connecticut solar installers on license status, itemized pricing, interconnection experience and warranty service, and ignore a one-number monthly-payment pitch.
Test your Connecticut quotes by ZIP code
Eversource or UI, slate or shingle, cash or loan. Enter your ZIP code to compare a properly sized system against the 2026 Connecticut benchmarks, then check each proposal line by line.
- Quotes built for your roofEach quote is designed around your home and your bills.
- Installers we keep checkingPartners are screened before they join and monitored after.
- No cost, no pressureComparing quotes is free, and you are never obliged to sign.
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Frequently asked questions
How Much Do Solar Panels Cost in Connecticut in 2026?
Connecticut’s competitive installed price is $2.77/W. A representative 6.45 kW system costs $17,867, and the gross price equals net price for an owned 2026 installation because Section 25D is $0.
Does Connecticut Still Get the 30% Federal Solar Credit?
No homeowner credit applies to a system you own whose installation completed after December 31, 2025. A third-party owner may access Section 48E for a lease or PPA, with any benefit reflected in the contract rather than claimed by the homeowner.
How Much Does the Connecticut Sales-Tax Exemption Save?
The 6.35% exemption is worth $1,135 on the typical $17,867 system. The installer should leave the tax off the invoice through Form CERT-140 and should not charge it with a promise of a later refund.
What Are the Eversource and UI Solar Fees?
RRES application and meter fees total $346 in Eversource territory when a Form 2S meter applies. United Illuminating’s application and meter fees total $548. Confirm whether the installer includes them in the contract.
How Much Does a Solar Battery Cost in Connecticut?
Use $13,500 as a modeled round planning figure for a 13.5 kWh unit at $1,000/kWh installed. Replace it with a written quote that reflects power rating, backup scope, electrical work, and equipment.
Why Is a Loan Quote Higher Than the Cash Price?
National 2024 LBNL data shows a $3.5/W cash median and a $4.7/W loan median. Dealer fees and financing costs can widen the gap, so compare the cash price with the amount financed before comparing monthly payments.
Should I Replace My Roof Before Installing Solar?
Replace the roof first if it has under ten years of useful life. Removing and reinstalling a Connecticut array later costs $1,500 to $4,000.
How we calculate these costs
The $2.77 per watt behind every figure is Connecticut’s entry in the EcoGen Solar Cost Index (v2 method): a standardized installed price blended from current marketplace data and ranked against all 50 states and Washington DC. It sits 4.5% under the $2.90 national figure. Payback and 25-year figures use the EcoGen Solar Payback Methodology at 4% yearly rate growth (Connecticut’s own 5-year rate growth, capped at the model ceiling) and 0.5% panel degradation over 25 years. Eversource and United Illuminating supply rates are read separately and carry their own as-of date. Your written quote will vary with roof, equipment and installer.
Sources (16)
- Connecticut Department of Revenue Services, Solar Sales-Tax Guidance: portal.ct.gov
- Internal Revenue Service, One Big Beautiful Bill Provisions: irs.gov
- United Illuminating, 2026 RRES Program Update
- Eversource, Connecticut Residential Solar Incentives
- Connecticut Department of Consumer Protection, Solar Energy Work Licensing: portal.ct.gov
- Eversource, Connecticut Rate 1 Tariff: eversource.com
- National Renewable Energy Laboratory, PVWatts Calculator
- U.S. Energy Information Administration, Form EIA-861
- Lawrence Berkeley National Laboratory, 2025 Distributed Solar Data Update
- EnergySage, Connecticut Solar Cost Data
- SolarReviews, Connecticut Solar Panel Cost
- Connecticut Green Bank, Smart-E Loans
- U.S. Government Publishing Office, Public Law 119-21, Section 48E: govinfo.gov
- International Code Council, Connecticut Building Code Appendix AY
- Connecticut Office of Consumer Counsel, July 2026 Standard Service Rate Advisory: portal.ct.gov
- Connecticut DEEP, Governor Announces Lower Electricity Rates
