Connecticut Solar Incentives 2026: Complete Guide to RSIP, Tax Exemptions & Net Metering

Connecticut has some of the highest electricity rates in the United States — averaging $0.25–$0.31/kWh in 2026, roughly double the national average. That alone makes solar one of the most financially compelling investments a CT homeowner can make.

Add the state's Residential Solar Investment Program (RSIP), a full sales tax exemption, a property tax exemption, and the 30% federal Investment Tax Credit, and Connecticut routinely produces payback periods of 4–7 years — among the fastest in the Northeast despite having fewer peak sun hours than Sun Belt states.

This guide explains every Connecticut solar incentive available in 2026, how they stack, and what a realistic return on investment looks like for CT homeowners.

Connecticut's Solar Incentive Stack at a Glance

Incentive	Type	Value
Federal Investment Tax Credit (ITC)	Tax credit	30% of gross system cost
RSIP Performance-Based Incentive	Cash income over 6 years	$0.20–$0.26/kWh on metered production
Property tax exemption	Tax savings	100% exemption on system value
Sales tax exemption	Upfront savings	6.35% sales tax waived on solar equipment
Net metering (retail rate)	Bill credits	Retail rate (~$0.27/kWh) for exported solar

1. Federal Investment Tax Credit (30%)

The federal ITC remains the foundation of any solar analysis. Connecticut homeowners can deduct 30% of the total installed system cost from their federal income taxes. This credit applies to the full gross cost before any rebates or state credits.

System Size	Gross Cost (estimated)	Federal ITC (30%)	Net Cost Before Other Incentives
6 kW	$17,400	$5,220	$12,180
8 kW	$22,400	$6,720	$15,680
10 kW	$27,500	$8,250	$19,250
12 kW	$32,400	$9,720	$22,680

The ITC is non-refundable — it reduces your federal tax liability dollar for dollar but cannot generate a refund if it exceeds what you owe. Any unused credit carries forward to subsequent tax years. For most working homeowners, the full credit is usable within 1–2 tax years. See the federal solar tax credit guide for IRS Form 5695 claiming instructions.

2. Connecticut RSIP: The State's Signature Solar Incentive

The Residential Solar Investment Program (RSIP) is Connecticut's primary state solar incentive, administered by the Connecticut Green Bank and funded through a small charge on Eversource and United Illuminating ratepayers.

How RSIP Works

The RSIP is a production-based incentive (PBI) — you earn a per-kilowatt-hour payment for every kWh your system produces, metered by your utility, for 6 years from the activation date.

Key mechanics:

• Rate: $0.20–$0.26/kWh depending on the current capacity block and utility territory (Eversource or UI)
• Duration: 6 years from system commissioning
• Measurement: Based on metered production (not self-consumption — you earn on ALL production)
• Payment: Monthly on your utility bill as a credit
• Enrollment: Through your CT Green Bank-registered installer (they handle the paperwork)
• System cap: 10 kW for most residential systems; larger systems may be eligible under commercial RSIP

RSIP Capacity Blocks

The RSIP runs in capacity blocks — when a block fills (a set amount of total solar capacity is enrolled), the next block opens, often at a lower rate. As of 2026, later-block rates are in the $0.20–$0.26/kWh range. Check the CT Green Bank RSIP page for the current open block rate before signing a contract.

Practical tip: Because blocks fill over time, applying sooner generally locks in a higher per-kWh rate. Installers can submit RSIP applications before physical installation — your rate is locked when your application is approved, not when the system turns on.

RSIP-E: Income-Qualified Enhanced Program

Connecticut offers a separate, enhanced incentive for income-qualified households through RSIP-E:

• Available to households at 80% or below Area Median Income (AMI)
• Higher per-kWh payment rate than standard RSIP
• Often combined with Eversource's or UI's low-income assistance programs
• Application through the same CT Green Bank process

If your household income is near or below AMI for your county, ask your installer to check RSIP-E eligibility before signing.

What RSIP Income Looks Like Over 6 Years

For an 8 kW system producing ~9,400 kWh/year in Connecticut (based on ~4.0–4.2 peak sun hours/day):

Year	kWh Produced	RSIP Rate (est.)	Annual RSIP Income
1	9,400 kWh	$0.24/kWh	$2,256
2	9,353 kWh	$0.24/kWh	$2,245
3	9,306 kWh	$0.24/kWh	$2,233
4	9,259 kWh	$0.24/kWh	$2,222
5	9,212 kWh	$0.24/kWh	$2,211
6	9,166 kWh	$0.24/kWh	$2,200
Total			~$13,367

This is in addition to the electricity you save by not buying from the grid. The RSIP effectively turns your solar panels into a dual-income asset during the first 6 years.

3. Property Tax Exemption

Connecticut General Statutes § 12-81(56) provides a complete property tax exemption for the value added by a residential solar energy system.

In practice, this means:

• Your home's assessed value increases when you add solar panels (most CT assessors add $10,000–$20,000 in assessed value for a residential system)
• That additional assessed value is fully exempt from property taxes
• The exemption applies for the life of the system, not just a set number of years

Dollar value example: In Hartford (mill rate of ~74 mills), a system adding $15,000 of assessed value would otherwise cost $1,110/year in additional property taxes ($15,000 x 0.074). With the exemption, that cost is zero — saving $27,750 over 25 years in nominal terms.

Important nuance: While the state statute provides the exemption, some municipalities require homeowners to file an exemption application with the local assessor. Contact your town's assessor office after installation to confirm the exemption is in place and submit Form M-26 if required.

4. Sales Tax Exemption

Connecticut General Statutes § 12-412(116) exempts solar energy systems and components from the state's 6.35% sales and use tax.

For a typical residential system:

• Equipment subject to tax (panels, inverter, racking): roughly $8,000–$14,000
• Tax saved: $508–$889

In practice, a properly registered CT Green Bank installer will not charge sales tax on solar equipment. If your installer quotes sales tax on the solar hardware, flag it — either the equipment is incorrectly categorized or the installer is not registered correctly.

5. Net Metering in Connecticut

Net metering in Connecticut is regulated by the Public Utilities Regulatory Authority (PURA) under Connecticut General Statutes § 16-243h.

Key rules:

• System size eligible: Up to 2,000 kW (2 MW) for commercial; residential systems are typically 6–20 kW and all qualify
• Netting period: Monthly — excess generation rolls over as a credit at the retail rate
• Annual true-up: Any remaining credit balance at the end of the 12-month netting period is purchased by the utility at the avoided cost rate (~$0.04–$0.07/kWh), which is much lower than the retail rate
• Rate credited: Full retail rate (~$0.27–$0.30/kWh) for monthly netting; reduced avoided-cost rate for year-end excess

Design implication: Because the annual year-end true-up pays avoided cost rather than retail rate, do NOT design your system to produce significantly more than your annual consumption. Size the system to cover roughly 90–100% of your annual electricity use, not more. Excess generation beyond your annual usage is essentially wasted value.

Eversource vs. United Illuminating: Which Territory Are You In?

Connecticut has two investor-owned utilities, each administering RSIP within their territory:

Eversource Energy serves most of Connecticut — Hartford, New Haven (much of it), New London, Windham, Tolland, and Middlesex counties, plus parts of Fairfield County.

United Illuminating (UI) serves southwestern Connecticut — parts of New Haven County (Ansonia, Derby, Milford, Orange, Shelton, West Haven) and the Bridgeport/Stratford area in Fairfield County.

The RSIP program operates under both utilities with similar rates, though block capacity and opening dates differ slightly by territory. Your installer will register your RSIP application under the correct utility. Net metering rules are identical under both utilities (both operate under the same PURA regulations).

If you are on a municipal electric utility or rural co-op (rare in CT), different net metering rules may apply — confirm with your utility.

Full Incentive Stacking Examples

Example 1: Hartford 8 kW (Eversource Territory)

A homeowner in Hartford installs an 8 kW south-facing system on an asphalt shingle roof.

Item	Amount
Gross system cost	$22,400
Federal ITC (30%)	-$6,720
Net cost after ITC	$15,680
Sales tax exemption (already waived by installer)	$0 additional (saves ~$700 at purchase)
Annual electricity savings (9,400 kWh x $0.27/kWh)	$2,538/year
Annual RSIP income (9,400 kWh x $0.24/kWh, Year 1)	$2,256/year
Total annual benefit, Years 1–6	$4,794/year
Total annual benefit, Years 7–25	$2,538/year
Simple payback period	~3.3 years
25-year electricity savings (estimate)	~$63,450
Property tax exemption (25 years, Hartford rate)	~$20,000+
Net 25-year profit	~$65,000+

Example 2: New Haven 10 kW (Eversource Territory)

A homeowner in New Haven installs a 10 kW system. New Haven's electricity rates are among the highest in the state at $0.29/kWh.

Item	Amount
Gross system cost	$27,500
Federal ITC (30%)	-$8,250
Net cost after ITC	$19,250
Annual electricity savings (11,700 kWh x $0.29/kWh)	$3,393/year
Annual RSIP income (11,700 kWh x $0.24/kWh, Year 1)	$2,808/year
Total annual benefit, Years 1–6	$6,201/year
Simple payback period	~3.1 years
25-year net savings	~$80,000+

Example 3: Bridgeport 8 kW (United Illuminating Territory)

A homeowner in Bridgeport with moderate shading installs a 8 kW system using microinverters to mitigate partial shading losses. Effective production is ~8,800 kWh/year.

Item	Amount
Gross system cost (microinverter premium)	$24,800
Federal ITC (30%)	-$7,440
Net cost after ITC	$17,360
Annual electricity savings (8,800 kWh x $0.28/kWh)	$2,464/year
Annual RSIP income (8,800 kWh x $0.24/kWh)	$2,112/year
Total annual benefit, Years 1–6	$4,576/year
Simple payback period	~3.8 years
25-year net savings	~$60,000+

Connecticut Solar Financing Options

CT Green Bank Solar Loan: The Connecticut Green Bank offers low-interest unsecured loans for residential solar through partner lenders. Terms range from 7 to 25 years at competitive rates. A Green Bank loan preserves your ITC ownership (unlike a lease/PPA) and lets you capture all RSIP income.

Solar loans from local credit unions: Connecticut has a strong credit union market. Many local credit unions offer solar loans at lower rates than national installers' financing partners.

Cash purchase: Provides the fastest payback and the most flexibility. With 4-year payback in many cases, cash buyers see exceptional ROI.

Solar lease / PPA: Available from some national installers (Sunrun, SunPower). Monthly payments with no upfront cost, but you forgo the 30% ITC and the RSIP income goes to the system owner (the installer), not you. Calculate the 25-year total payment vs. cash purchase before signing.

See the solar financing options guide for a full analysis of loan vs. lease vs. cash vs. PACE financing tradeoffs.

Connecticut vs. Neighboring States

State	State Program	Property Tax	Sales Tax Exempt	Payback (Est.)
Connecticut	RSIP ($0.24/kWh, 6 yr)	Yes (full)	Yes (6.35%)	3–5 years
New York	NY-Sun + 25% state credit	Yes	Yes	5–8 years
Massachusetts	SMART PBI ($0.15–$0.22/kWh, 10 yr)	Yes (20-year)	Yes (6.25%)	4–7 years
Rhode Island	Renewable Energy Fund rebate	Yes	No	6–9 years
New Jersey	SREC II ($185–$270/MWh, 15 yr)	Yes	Yes (6.625%)	4–6 years

Connecticut compares very favorably to all New England neighbors. The RSIP's 6-year PBI is shorter than Massachusetts' SMART (10 years) but comes on top of some of the highest electricity rates in the country. The result is that Connecticut's payback periods often beat Massachusetts despite CT having fewer peak sun hours.

If you are near the New York border, see the New York solar incentives guide and Massachusetts solar incentives guide.

How to Go Solar in Connecticut: Step-by-Step

1. Get multiple quotes — aim for 3+ bids from CT Green Bank-registered installers. Compare on a cost-per-watt basis to normalize for different system sizes.

2. Verify RSIP registration — confirm the installer is registered with the CT Green Bank to submit RSIP applications. Unregistered installers cannot enroll your system in RSIP.

3. Check the current RSIP block rate — before signing a contract, verify the current open block rate at the CT Green Bank website. This determines your 6-year income stream.

4. File the property tax exemption — after installation, contact your local assessor to confirm the exemption is applied (Form M-26 in some towns). Do not assume it is automatic.

5. Review your net metering agreement — understand the monthly netting vs. annual true-up mechanics and size your system to avoid large year-end excess production.

6. Claim the federal ITC on Form 5695 — file IRS Form 5695 in the tax year your system is placed in service (not when you sign the contract or pay the deposit).

7. RSIP payments begin automatically — after commissioning, the installer submits your RSIP enrollment. Monthly RSIP credits appear on your utility bill, typically starting 1–2 months after commissioning.

Connecticut Solar Market Outlook

Connecticut has one of the most durable solar policy environments in the country. The RSIP has been running in successive blocks since 2015 with no indication of discontinuation. PURA has consistently protected retail-rate net metering and shows no current movement toward a California-style NEM 3.0 reform. The CT Green Bank's legislative mandate to promote clean energy remains in place.

Rising electricity rates are the strongest long-term driver. Connecticut's rates have increased at roughly 4–5% annually over the past decade, driven by Eversource transmission costs, ISO-New England capacity prices, and fuel oil dependence. Each rate increase makes existing solar systems more valuable. At 4% annual growth, a 2026 rate of $0.27/kWh becomes $0.40/kWh by 2035 and $0.59/kWh by 2045 — dramatically accelerating the savings for systems installed now.

Battery storage is growing rapidly in CT due to Eversource's Time-of-Use (TOU) rate options. A home battery (Tesla Powerwall 3, Enphase IQ 5P) paired with solar can shift consumption to avoid peak rates ($0.35–$0.45/kWh in Eversource's EV-TOU and Peak Savings Time-of-Use rates). The 30% federal ITC applies to battery storage paired with solar. See the home battery storage costs guide for product pricing and installation costs.

Summary

Connecticut is one of the best states for residential solar in the Northeast, despite not being the sunniest state on the map. The combination of:

• 30% federal ITC reducing net cost by nearly one-third
• RSIP performance payments adding $11,000–$15,000 in income over 6 years on a typical system
• Full property tax exemption worth $15,000–$30,000 over system life at Connecticut property tax rates
• Full sales tax exemption saving $500–$900 at purchase
• High retail electricity rates ($0.27–$0.31/kWh) making every kWh of solar production especially valuable
• Retail-rate net metering with monthly credit rollover

...produces payback periods of 3–5 years for well-sited systems — among the fastest solar economics in New England.

To understand how Connecticut compares to the national picture, see the solar payback period calculator or the solar vs. grid electricity cost comparison. For the full inventory of state programs, see the state-by-state solar incentives guide.