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The federal residential solar tax credit died on December 31, 2025. Connecticut homeowners receive $0 from Washington in 2026. And CT has no state solar rebate either. But the incentive stack still delivers $25,000-$40,000+ in total value — thanks to RRES netting, the strongest battery incentive in New England, and permanent tax exemptions.
This is the honest guide. No outdated ITC claims. No fake savings numbers. Just the real programs, real dollar amounts, and the exact steps to maximize every one of them.
Federal ITC
$0
Expired Dec 31, 2025
Lifetime Stack Value
$85K+
10 kW system + battery
Battery Incentive
$16K
Strongest in New England
Payback Period
~9 yrs
Cash, with battery + ESS
Quick Answer
The federal residential solar tax credit (Section 25D) expired December 31, 2025. Connecticut homeowners receive $0 from the ITC in 2026, and CT has no state solar rebate either. However, the remaining incentive stack still totals $25,000-$40,000+ over a system's lifetime. The key programs: RRES netting ($2,500-$4,000/year at ~$0.24-$0.25/kWh), 6.35% sales tax exemption (~$1,900), permanent property tax exemption ($400-$600/year), Energy Storage Solutions battery incentive (up to $16,000), and Smart-E Loan financing through CT Green Bank. Follow the 8-step action plan below to claim every dollar.
Before we show you how to maximize what is still available, let us be direct about what is not.
The federal residential solar Investment Tax Credit — the one that gave homeowners 30% back on their solar purchase — is dead. It was eliminated by the One Big Beautiful Bill Act (OBBBA), signed July 4, 2025. There is no pending legislation to reinstate it.
If you buy solar with cash or a loan in 2026, you receive $0 from the federal government.
Unlike Massachusetts (which offers a $1,000 state tax credit) or other states with direct solar rebates, Connecticut does not have a state solar rebate or tax credit. CT also does not have a SMART-style production incentive program. This is an honest reality that other solar guides skip over.
Where CT falls short on solar-only incentives, it makes up for with the strongest battery storage incentive in the region. The Energy Storage Solutions program delivers up to $16,000 in total value — more than MA ConnectedSolutions in upfront incentives. Combined with RRES netting and permanent tax exemptions, a solar+battery system still delivers excellent returns.
The key is knowing about every available program, stacking them correctly, and making the battery decision wisely. This guide ensures you do not leave money on the table.
Each layer stacks on top of the others. Claim all six (including battery) and a $30,000 solar system delivers $85,000+ in total value over 25 years.
Previously 30% of system cost (~$9,000 on a $30,000 system). Now $0 for cash/loan purchases. If you lease or PPA, the third-party owner can still claim Section 48/48E (30%+) on projects beginning construction before July 4, 2026 — and pass some savings to you as lower payments.
Here is what the full incentive stack looks like for a typical Connecticut homeowner on Eversource, purchasing a 10 kW system with battery, paid in cash.
| Item | Value |
|---|---|
| Solar System (10 kW at $3.10/W) | $31,000 |
| Battery Storage (~13.5 kWh) | $14,000 |
| Total Gross Cost | $45,000 |
| Federal ITC (25D) | $0 |
| Sales Tax Exemption (6.35%) | -$2,858 |
| Energy Storage Solutions (upfront portion) | -$7,500 |
| Net Out-of-Pocket Cost | ~$34,642 |
| RRES Net Metering Credits (25 years) ~$0.25/kWh effective, 10,000 kWh/yr excess, 3% annual rate increase | ~$62,500 |
| Property Tax Savings (permanent) $500/yr average at ~1.5% tax rate, 30-year system life | ~$15,000 |
| ESS Performance Payments (10 years) Bi-annual payments for grid participation | ~$8,500 |
| Avoided Utility Bills (25 years) $0.25/kWh rising 3-5%/yr, 12,000 kWh self-consumed | ~$75,000 |
| Total Lifetime Value (solar + battery) | $163,000+ |
| Total Lifetime Value (solar only, no battery) | $85,000+ |
Estimated Payback Period
~9 Years
Cash purchase, 10 kW + battery, Eversource territory, with ESS incentive. Solar only (no battery): ~10.5 years.
Follow these steps in order. Each one builds on the previous. Skip none of them.
Request quotes from at least three NABCEP-certified solar installers, including NuWatt. Compare $/W pricing, panel tiers, and warranty terms. Ask each installer about RRES enrollment and battery incentive assistance.
Verify with your installer that your system qualifies for RRES netting (residential, under 25 kW). Confirm the 20-year tariff term and understand the effective credit rate after the 3.25 cent/kWh NBC charge. Compare RRES netting vs Buy-All options for your usage pattern.
The Energy Storage Solutions program can provide up to $16,000 in total incentive value for battery storage. This is CT strongest solar incentive. Get a battery quote alongside your solar quote and compare the combined ROI.
Select from entry-tier (Hyundai 440W, lowest cost), standard (Silfab 440W, FEOC-qualified), or premium (REC 460W, highest efficiency). Your choice affects $/W pricing but all tiers qualify for every Connecticut incentive.
If you need financing, check the Smart-E Loan through CT Green Bank: 6.99-7.99% APR, up to $50,000, 20-year terms. It can cover up to 25% for non-energy improvements like roof repair. Compare against standard solar loans and home equity options.
Review the contract for total cost, warranty terms, battery incentive enrollment commitment, and payment schedule. Typical CT installations are scheduled 4-8 weeks after signing.
A typical residential solar installation takes 1-2 days. If adding a battery, expect an additional half-day. Your installer mounts panels, runs wiring, installs the inverter, connects to your electrical panel, and sets up the battery system.
Your town building inspector reviews the installation. After approval, your installer submits the interconnection application to Eversource or United Illuminating. Permission to Operate (PTO) typically takes 2-4 weeks in CT.
Ready to start with Step 1?
Get Your Free Solar QuoteWe see these mistakes constantly. Each one can cost you $3,000-$16,000+ in lost incentives or wasted money.
Cost: Every month without solar = $250-$400+ to your utility at rates rising 3-5% annually. CT has some of the highest electricity rates in the nation.
Fix: There is no pending legislation. The ITC is gone. Install now while CT incentive programs remain funded.
Cost: You leave up to $16,000 in total battery incentive value on the table — the strongest in New England
Fix: Always get a battery quote alongside your solar quote. The ESS incentive can cover 40-50% of battery cost, making the ROI compelling.
Cost: Buy-All pays ~$0.30/kWh for ALL production but you buy back at retail. For most homes that self-consume 30-50% of production, netting is significantly more valuable.
Fix: Run the numbers with your installer. If you use electricity during the day (EV charging, home office, heat pump), RRES netting almost always wins over Buy-All.
Cost: If your roof needs repair, you pay for it separately at higher rates or delay solar installation
Fix: The Smart-E Loan through CT Green Bank lets you finance up to 25% of the loan for non-energy improvements like roof repair. One loan, one payment, competitive rate.
Cost: Some CT towns require you to apply for the property tax exemption. Missing this costs $400-$600/year permanently.
Fix: Contact your town assessor office within 60 days of installation to confirm the property tax exemption is applied. Bring your solar installation receipt.
We serve both states. Here is the honest comparison. MA is better for solar-only. CT is better for solar + battery.
| Incentive | Connecticut | Massachusetts |
|---|---|---|
| Federal ITC (25D) Expired in both states | $0 | $0 |
| State Tax Credit MA advantage | None | $1,000 |
| Production Incentive MA advantage: $6K-$8K value | None | SMART $0.03/kWh (20yr) |
| Net Metering MA higher rate, CT still strong | ~$0.24-0.25/kWh (RRES) | $0.28-0.32/kWh (1:1) |
| Sales Tax Exempt Similar | 6.35% exempt | 6.25% exempt |
| Property Tax Exempt CT advantage: permanent | Permanent | 20 years |
| Battery Incentive CT stronger upfront | Up to $16,000 (ESS) | $225-$3,250/yr (CS) |
| Green Bank Loan CT advantage | Smart-E: 6.99-7.99% | None (ended 2020) |
| Solar-Only Payback MA faster | ~10.5 years | ~7.5 years |
| Solar+Battery Payback MA still faster, but CT gap narrows | ~9 years | ~5.5 years |
Bottom line: Massachusetts has a stronger overall solar incentive stack thanks to SMART 3.0 and a $1,000 state tax credit. But CT's Energy Storage Solutions battery incentive is the strongest in New England, and CT's permanent property tax exemption outlasts MA's 20-year version. If you are adding battery storage, the CT incentive gap narrows significantly.
The residential 25D credit is dead. But the commercial 48/48E credit lives on — and there is a way for CT homeowners to benefit.
You sign a solar lease or Power Purchase Agreement (PPA)
A third-party financing company OWNS the system on your roof
That company claims the Section 48/48E commercial ITC (30%+ of system cost)
They pass some of that savings to you as lower monthly payments or a lower PPA rate
You do NOT file anything on your taxes — the benefit is baked into your monthly cost
Deadline: Section 48/48E is available for projects that begin construction before July 4, 2026. After that date, this backdoor closes too. If you are considering a lease or PPA, act before summer 2026.
No. The federal residential solar Investment Tax Credit (Section 25D) expired on December 31, 2025. Connecticut homeowners who buy solar with cash or a loan receive $0 from the federal government in 2026. Many solar company websites still advertise a 30% federal credit — this is false and misleading.
No. Unlike Massachusetts ($1,000 tax credit) or some other states, Connecticut does not offer a state-level solar rebate or tax credit. CT homeowners rely on RRES net metering credits, tax exemptions, battery incentives, and favorable Smart-E financing instead.
Connecticut homeowners can still access $25,000-$40,000+ in total incentive value over the system lifetime. This includes RRES netting credits ($2,500-$4,000/year), sales tax exemption (~$1,800-$2,300), permanent property tax exemption ($400-$600/year), Energy Storage Solutions battery incentive (up to $16,000), and Smart-E loan savings.
RRES (Residential Renewable Energy Solutions) netting credits your electric bill at retail rate for excess solar production sent to the grid. Effective credit value is approximately $0.24-$0.25/kWh after the 3.25 cent/kWh non-bypassable charge (NBC). Credits carry forward monthly with annual true-up. The tariff term is 20 years.
The Energy Storage Solutions (ESS) program provides upfront incentives for residential battery storage, plus bi-annual performance-based payments for 10 years. Total incentive value can reach up to $16,000. This makes CT the strongest battery incentive state in New England — exceeding even Massachusetts ConnectedSolutions.
The Smart-E Loan is offered through the Connecticut Green Bank at 6.99-7.99% APR with terms up to 20 years and a maximum of $50,000. A unique benefit: you can finance up to 25% of the loan amount for non-energy improvements like roof repair — making it ideal if your roof needs work before solar installation.
Without the federal ITC, the payback period for solar in Connecticut is approximately 9-11 years for systems purchased with cash. With a battery enrolled in the Energy Storage Solutions program, payback drops to 7-9 years. After payback, you enjoy 14-16+ years of essentially free electricity plus ongoing RRES credits.
No. There is no legislation pending to reinstate Section 25D. Waiting costs you money: every month without solar means paying $250-$400+ to your utility at rates increasing 3-5% annually. CT electricity rates are among the highest in the nation. Delaying only increases your total cost of electricity.
Every active program in one place
Full guide to CT net metering
ESS incentive + battery sizing
Honest math for 2026 CT solar
CT Green Bank loan details
Sales + property tax savings
Best financing path for 2026
Real pricing by city and utility
Which utility territory is better?
The federal credit is gone and CT has no state rebate. But RRES netting, the strongest battery incentive in New England, and permanent tax exemptions still deliver serious value. Every month you wait, your utility bill keeps climbing.
Free, no-obligation quote. Includes battery storage evaluation and ESS incentive eligibility.