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Get a Free QuoteThe Connecticut Green Bank was established in 2011 as the first green bank in the United States. It has deployed over $2 billion in clean energy investment across Connecticut. Here is every program it offers in 2026 and how to access each one.
$2B+
Total Deployed
6
Programs Active
0.99%
Smart-E APR
2011
Year Founded
The Connecticut Green Bank is not a traditional bank where you open a checking account. It is a quasi-public state agency created by the Connecticut legislature (Public Act 11-80) to use innovative financing to accelerate clean energy deployment in the state. It was the first green bank in the United States, and its model has been replicated in 20+ states and countries worldwide.
The Green Bank’s core strategy is leverage: it uses a relatively small amount of public capital (from ratepayer funds and state allocations) to attract much larger amounts of private investment. For every $1 of public money, the Green Bank has historically attracted $7-$10 of private capital. This multiplier effect is how it has deployed over $2 billion in clean energy investment across Connecticut.
For homeowners, the Green Bank matters because it is the entity behind the Smart-E Loan — the reason CT homeowners can finance solar panels and heat pumps at 0.99% APR while the rest of the country pays 7-12% for the same improvements.
Many CT homeowners confuse these two entities. They are separate organizations that work together on complementary programs.
| Aspect | Energize CT | CT Green Bank |
|---|---|---|
| Type of Organization | Brand administered by Eversource & UI | Quasi-public state agency (independent) |
| Primary Function | Rebates and incentive programs | Financing and capital deployment |
| Funding Source | Ratepayer funds (CAM charge on utility bills) | Ratepayer funds + bonds + federal grants + private capital |
| Key Residential Program | Rebates (up to $10,000 for heat pumps) | Smart-E Loan (0.99% APR up to $50,000) |
| Contractor Network | HPIN (Heat Pump Installer Network) | Smart-E participating contractors |
| Commercial Programs | Business energy audits, incentives | C-PACE financing (up to 25 years) |
| Can They Stack? | Yes — rebate reduces system cost | Yes — Smart-E finances the remainder |
| Customer Interaction | Through utility bill or contractor | Through participating contractor (not direct) |
How They Work Together (Example)
You install a heat pump: Energize CT provides a $2,500-$10,000 rebate that reduces your system cost. The CT Green Bank’s Smart-E Loan finances the remaining balance at 0.99% APR. Same project, two programs, maximum savings. Your contractor (like NuWatt) handles both applications simultaneously.
Residential Financing
Rate / Return
0.99%
Max Amount
$50,000
Term
5-20 years
Eligibility
Eversource & UI residential customers
Covers
Solar, heat pumps, insulation, windows, HVAC, water heaters, batteries
How It Works
Subsidized interest rate loan delivered through participating contractors and lenders. The CT Green Bank uses ratepayer funds and bond proceeds to buy down the interest rate from market rates (7-10%) to 0.99% APR. Homeowners apply through their contractor, not directly through the Green Bank.
What NuWatt Uses
NuWatt is a registered Smart-E contractor. We handle the entire application process for our CT solar and heat pump customers.
Commercial Financing
Rate / Return
5-7% (fixed)
Max Amount
No cap
Term
Up to 25 years
Eligibility
Commercial, industrial, and multifamily properties
Covers
Solar, HVAC, building envelope, lighting, EV charging, battery storage
How It Works
Property Assessed Clean Energy financing attaches the repayment to the property tax bill rather than the property owner. This means the financing stays with the building if sold, there is no personal guarantee, and terms can extend to 25 years. The CT Green Bank administers the program, reviews applications, and works with capital providers to fund projects.
What NuWatt Uses
NuWatt works with commercial clients to structure C-PACE applications for solar and HVAC projects, coordinating with the Green Bank and capital providers.
Low-Income / Equity
Rate / Return
Subsidized / Grant
Max Amount
Varies
Term
Program-dependent
Eligibility
Income-eligible CT households (below 80% AMI)
Covers
Solar, battery storage, energy efficiency, workforce development
How It Works
Funded through the federal Greenhouse Gas Reduction Fund (IRA), the CT Green Bank is deploying $156 million in Solar for All funding to bring solar and storage to low-income and disadvantaged communities. The program includes direct installations, community solar subscriptions, and workforce training. Specific enrollment pathways are being finalized in 2026.
What NuWatt Uses
NuWatt refers income-eligible homeowners to the Solar for All program and coordinates with the Green Bank when installations overlap with our service area.
Community Solar
Rate / Return
N/A (subscription)
Max Amount
N/A
Term
Flexible enrollment
Eligibility
Any CT ratepayer (Eversource or UI)
Covers
Community solar farm subscriptions with bill credits
How It Works
The SCEF program enables community solar projects across Connecticut. Solar farms (1-4 MW) are built on commercial, industrial, or municipal land. CT ratepayers subscribe for a portion of the output and receive bill credits at a discount. No installation, no upfront cost, and most programs allow month-to-month participation. The Green Bank provides project financing and manages subscriber enrollment.
What NuWatt Uses
NuWatt refers homeowners who are not candidates for rooftop solar (bad roof, renters, shade issues) to SCEF community solar programs as an alternative.
Capital Markets
Rate / Return
Investment return
Max Amount
Per issuance
Term
Varies (5-20 years)
Eligibility
Accredited and retail investors through broker-dealers
Covers
Funds residential solar, energy efficiency, and community solar projects
How It Works
The CT Green Bank issues investment-grade green bonds to raise private capital for its lending programs. These bonds are backed by the repayment streams from Smart-E loans, C-PACE assessments, and other financing products. Investors receive a fixed return while their capital funds clean energy deployment in Connecticut. The Green Bank has issued over $300 million in green bonds since 2014.
What NuWatt Uses
NuWatt installations funded by Smart-E loans are part of the loan pool that backs CT Green Bank green bonds, connecting our customers to the broader clean energy capital market.
Affordable Housing
Rate / Return
Below-market
Max Amount
$100,000
Term
Project-based
Eligibility
Affordable and mixed-income multifamily developers
Covers
Pre-development costs for solar, energy efficiency, and electrification in affordable housing
How It Works
The Green Bank provides pre-development funding to help affordable housing developers assess and plan clean energy improvements. This covers energy audits, engineering studies, financial modeling, and application preparation for C-PACE or other financing. The goal is to remove barriers that prevent affordable housing from accessing clean energy.
What NuWatt Uses
NuWatt provides solar and HVAC assessments for multifamily projects referred through this program.
$2.1B
Total Investment Deployed
Across all programs since 2011
$7:$1
Private Capital Leveraged
For every $1 public, $7 private
60,000+
CT Homes Served
Through Smart-E and residential programs
290K tons
CO2 Reduced Annually
From funded clean energy projects
$300M+
Green Bonds Issued
Investment-grade rated
30,000+
Jobs Supported
Clean energy jobs across CT
350+
C-PACE Projects
Commercial clean energy projects
100+ MW
Community Solar Capacity
Through SCEF program
The CT Green Bank does not have a retail office where you walk in and apply. Its programs are delivered through a network of participating contractors, lenders, and project developers. Here is the access path for each type of customer:
The CT Green Bank model has been studied and replicated worldwide because it solves a fundamental problem: clean energy projects are financially sound but face high upfront costs that prevent adoption. Traditional subsidies (like tax credits) are expensive and politically vulnerable. The green bank model uses a small amount of public capital to de-risk investments, attract private money, and create self-sustaining financing programs.
For Connecticut homeowners, this means:
The Green Bank uses its public capital to buy down interest rates. Smart-E at 0.99% APR vs. 7-12% market rate saves CT homeowners thousands on each project.
Unlike federal tax credits (which expired), the Green Bank is a permanent state institution with ongoing funding. Its programs survive political cycles.
Every $1 of public money brings in $7+ of private investment. This means the Green Bank can serve many more CT homeowners than a traditional rebate program.
The Green Bank earns money from its lending activities. Smart-E loan repayments fund new loans. This creates a revolving fund that grows over time rather than depleting.
The Connecticut Green Bank is a quasi-public agency established by the Connecticut legislature in 2011 — the first green bank in the United States. It uses public funds, ratepayer dollars, and private capital to finance clean energy projects for CT homeowners, businesses, and municipalities. It is not a traditional bank where you open an account; rather, it creates and manages financing programs like Smart-E Loan and C-PACE that are delivered through participating contractors and lenders.
Energize CT is the state's energy efficiency brand administered by Eversource and United Illuminating using ratepayer funds collected through the Conservation Adjustment Mechanism (CAM). It manages rebates, the Home Energy Solutions program, and contractor networks like HPIN. The CT Green Bank is a separate quasi-public entity that focuses on financing — loans, bonds, and investment programs. They often work together: Energize CT provides the rebate and the CT Green Bank provides the financing (Smart-E Loan) for the same project.
You do not apply directly to the CT Green Bank. Instead, you work with an approved Smart-E contractor (like NuWatt) who submits the application on your behalf. The process: (1) Get a quote from an approved contractor, (2) Contractor submits the Smart-E application with project details, (3) Participating lender reviews your credit and income, (4) Approval in 3-5 business days, (5) Installation proceeds, (6) Funds disbursed to contractor upon completion. Current rate: 0.99% APR through June 30, 2026.
Commercial Property Assessed Clean Energy (C-PACE) is a financing program that allows commercial and industrial property owners to finance energy improvements through a voluntary assessment on their property tax bill. The CT Green Bank administers the program. C-PACE covers solar, HVAC, building envelope, lighting, and other energy improvements. Financing terms can extend to 25 years, payments are attached to the property (not the owner), and there is no personal guarantee required.
Solar for All is a federal program (funded through the Inflation Reduction Act's Greenhouse Gas Reduction Fund) that the CT Green Bank administers for Connecticut. It aims to deploy solar and battery storage for low-income and disadvantaged communities. The program provides grants and subsidized financing to reduce energy costs for income-eligible CT households. Specific program details and enrollment are being developed through 2026.
The CT Green Bank issues green bonds periodically to fund its programs. These bonds have been rated investment-grade and are available through participating broker-dealers. They are not available for direct purchase from the Green Bank. Previous bond issuances have funded residential solar, energy efficiency, and community solar projects across Connecticut. Check with your financial advisor for availability of current CT Green Bank bond offerings.
Yes. The CT Green Bank supports community solar through its Shared Clean Energy Facility (SCEF) program. These are solar arrays (typically 1-4 MW) sited on commercial or municipal land where residential and small business customers can subscribe for bill credits. Subscribers typically save 5-15% on their electric bills with no installation, no upfront cost, and flexible enrollment. The Green Bank provides financing for the project developers and manages subscriber enrollment.
NuWatt is a registered Smart-E participating contractor. When CT homeowners finance their solar or heat pump installation through NuWatt, we submit the Smart-E application on their behalf. This gives our customers access to 0.99% APR financing through the CT Green Bank. We also work with commercial clients on C-PACE projects and refer income-eligible homeowners to the Green Bank's Solar for All program when appropriate.
Detailed Smart-E application walkthrough
Smart-E vs HELOC vs personal loan
Commercial PACE financing guide
Subscribe to shared solar farms
Programs for lower-income CT households
Full Energize CT rebate overview