15 Best Solar Companies in Killingworth, CT (2025 Reviews)

We analyzed over 1500 solar companies in the nation,
and have selected the top 15 in Killingworth based on:

  • Customer review scores
  • Service area for Killingworth, CT
  • Company policies and services offered
  • Accreditations and certifications

Average Killingworth homeowner saves $1,906/year with solar panels

By EcoWatch Local Advisors

Data Analysis: James Savino

Ranking Methodology: Karsten Neumeister

Updated January 24, 2025

Why you can trust EcoWatch

We work with a panel of solar experts to create unbiased reviews that empower you to make the right choice for your home. No other site has covered renewables as long as us, which means we have more data and insider information than other sites. Our rankings are never affected by revenue or partnerships.

Best Solar Companies in Killingworth

As a homeowner or business owner in Killingworth, you may be considering switching to solar energy and wondering about the best solar companies in your area. Solar could be a good idea since it comes with lots of benefits. With high amounts of average daily sunlight in Killingworth, the solar industry is doing fairly well. An underrated driver of this has been national and statewide incentives that help with residential and commercial solar panel installation.


To help you comb through the large variety of Killingworth solar installers, we’ve narrowed in on a list of the top ones.Continue reading to see our picks for the top solar companies in the city, or get connected to a vetted solar company in your area right away by clicking the button below.

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Best Regional Coverage

Momentum Solar

★★★★★
4.5
  • Great warranty coverage
  • Representatives are experts on local policies
  • Concierge service ensures steady communication
  • Slightly limited service offerings

Best for Leasing

Sunrun

★★★★★
4.0
  • Expansive service area
  • Many financing options
  • Some reported issues with customer service
  • Some reported issues with door-to-door sales

EcoWatch Rankings for Solar Companies in Killingworth

Best Local Installer
ecowatch badge icon

EcoWatch Rating

4.9/5

Ion Solar Pros

  • Pros icon Reliable Customer Support
  • Pros icon Clear Pricing Policy
  • Pros icon Informative Resources
  • Pros icon Free Quotes
  • Con icon Limited information available on website

Services Offered

  • Service icon Consultation
  • Service icon Battery Storage
  • Service icon Panel Installation

Website: http://www.ionsolarpros.com/
Address: 751 Straits Turnpike Suite 2000, Middlebury, CT 06762
Phone: 8605445362
Outstanding Local Installer
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EcoWatch Rating

5.0/5

Synergy Smart Homes - Connecticut Solar & Elite SunPower Dealer

  • Pros icon Reliable Customer Support
  • Pros icon Clear Pricing Policy
  • Pros icon Free Quotes
  • Con icon Limited information available on website

Services Offered

  • Service icon Panel Installation
  • Service icon Financing Assistance
  • Service icon Consultation
  • Service icon Battery Storage
  • Service icon Cleaning and Maintenance
  • Service icon Tesla Powerwall
  • Service icon Skilled Repairs

Website: https://www.solarinstallationcontractor.com/
Address: 20 Tuttle Pl Suite 7, Middletown, CT 06457
Phone: 8603415001
Outstanding Local Installer
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EcoWatch Rating

5.0/5

GreenLeaf Solar

  • Pros icon Informative Resources
  • Pros icon Free Quotes
  • Pros icon Clear Pricing Policy
  • Pros icon Reliable Customer Support
  • Con icon Limited information available on website

Services Offered

  • Service icon Panel Installation
  • Service icon Solar Carports

Website: https://gogreenleafsolar.com/
Address: 11 Technology Dr, Setauket- East Setauket, NY 11733
Phone: 6315091747
Outstanding Local Installer
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EcoWatch Rating

5.0/5

Leviathan Solar

  • Pros icon Reliable Customer Support
  • Pros icon Clear Pricing Policy
  • Con icon Limited information available on website

Services Offered

  • Service icon Panel Installation

Website: https://leviathansolar.com/
Address: 1993 Pond Rd, Ronkonkoma, NY 11779
Phone: 6315532732
Outstanding Local Installer
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EcoWatch Rating

5.0/5

Harmony Energy

  • Pros icon Free Quotes
  • Pros icon Informative Resources
  • Pros icon Reliable Customer Support
  • Pros icon Clear Pricing Policy
  • Con icon Limited information available on website

Services Offered

  • Service icon Consultation
  • Service icon Panel Installation

Website: http://www.harmonyenergy.org/
Address: 80 Orville Dr, Bohemia, NY 11716
Phone: 6312441679
Outstanding Local Installer
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EcoWatch Rating

5.0/5

Marcor Solar

  • Pros icon Informative Resources
  • Pros icon Clear Pricing Policy
  • Pros icon Family-Operated Business
  • Pros icon Free Quotes
  • Con icon Limited information available on website

Services Offered

  • Service icon Financing Assistance
  • Service icon Skilled Repairs
  • Service icon Panel Installation

Website: https://www.marcorsolar.com/
Address: 135 Dale St, West Babylon, NY 11704
Phone: 6313549106
Outstanding Local Installer
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EcoWatch Rating

4.9/5

Everlast Energy

  • Pros icon Informative Resources
  • Pros icon Reliable Customer Support
  • Con icon Limited information available on website

Services Offered

  • Service icon Battery Storage
  • Service icon Panel Installation
  • Service icon Grid-Tied Solar System

Website: http://everlastenergyct.com/
Address: 1344 Silas Deane Hwy Suite 515, Rocky Hill, CT 06067
Phone: 8603623129
Outstanding Local Installer
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EcoWatch Rating

4.9/5

GreenLogic Energy

  • Pros icon Clear Pricing Policy
  • Pros icon Reliable Customer Support
  • Pros icon Prompt Service Delivery
  • Pros icon Free Quotes
  • Pros icon Informative Resources
  • Con icon Limited information available on website

Services Offered

  • Service icon Battery Storage
  • Service icon Consultation
  • Service icon Panel Installation

Website: https://www.greenlogic.com/
Address: 97 N Sea Rd #3, Southampton, NY 11968
Phone: 6317715152
Outstanding Local Installer
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EcoWatch Rating

4.9/5

Earthlight Technologies

  • Pros icon Reliable Customer Support
  • Pros icon Informative Resources
  • Pros icon Prompt Service Delivery
  • Pros icon Free Quotes
  • Con icon Limited information available on website

Services Offered

  • Service icon Consultation
  • Service icon Battery Storage
  • Service icon Panel Installation
  • Service icon Tesla Powerwall
  • Service icon Skilled Repairs

Website: https://www.earthlighttech.com/
Address: 128 West Rd, Ellington, CT 06029
Phone: 8608719700
Outstanding Local Installer
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EcoWatch Rating

4.9/5

NYS Essential Power

  • Pros icon Informative Resources
  • Pros icon Reliable Customer Support
  • Pros icon Prompt Service Delivery
  • Pros icon Clear Pricing Policy
  • Con icon Limited information available on website

Services Offered

  • Service icon Battery Storage
  • Service icon Panel Installation
  • Service icon Consultation

Website: https://www.nysessentialpower.com/
Address: 13 Trade Zone Dr, Ronkonkoma, NY 11779
Phone: 6314002680
Outstanding Local Installer
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EcoWatch Rating

4.9/5

Long Island Power Solutions

  • Pros icon Clear Pricing Policy
  • Pros icon Informative Resources
  • Pros icon Reliable Customer Support
  • Pros icon Free Quotes
  • Con icon Limited information available on website

Services Offered

  • Service icon Panel Installation
  • Service icon Consultation
  • Service icon Battery Storage
  • Service icon Financing Assistance
  • Service icon Grid-Tied Solar System

Website: https://www.lipowersolutions.com/
Address: 2060 Ocean Ave, Ronkonkoma, NY 11779
Phone: 6313480001
Outstanding Local Installer
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EcoWatch Rating

4.8/5

Green Power Energy

  • Pros icon Free Quotes
  • Pros icon Clear Pricing Policy
  • Pros icon Informative Resources
  • Pros icon Reliable Customer Support
  • Con icon Limited information available on website

Services Offered

  • Service icon Skilled Repairs
  • Service icon Permit Assistance
  • Service icon Financing Assistance
  • Service icon Battery Storage
  • Service icon Panel Installation
  • Service icon Consultation

Website: http://www.greenpowerenergy.com/
Address: 42 Ozick Dr Suite 3, Durham, CT 06422
Phone: 8669835793
Outstanding Local Installer
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EcoWatch Rating

4.8/5

Savkat Solar

  • Pros icon Free Quotes
  • Pros icon Reliable Customer Support
  • Pros icon Clear Pricing Policy
  • Con icon Limited information available on website

Services Offered

  • Service icon Cleaning and Maintenance
  • Service icon Panel Installation
  • Service icon Consultation
  • Service icon Battery Storage
  • Service icon Financing Assistance
  • Service icon Grid-Tied Solar System

Website: https://savkat.com/
Address: 71 Dolphin Rd, Bristol, CT 06010
Phone: 8608314141
Outstanding Local Installer
ecowatch badge icon

EcoWatch Rating

4.8/5

Element Energy Systems (E2SYS)

  • Pros icon Reliable Customer Support
  • Pros icon Informative Resources
  • Pros icon Free Quotes
  • Pros icon Clear Pricing Policy
  • Con icon Limited information available on website

Services Offered

  • Service icon Panel Installation
  • Service icon Cleaning and Maintenance
  • Service icon Solar Carports
  • Service icon Battery Storage
  • Service icon Consultation

Website: https://www.e2sys.com/
Address: 7470 Sound Ave, Mattituck, NY 11952
Phone: 6317797993
Outstanding Local Installer
ecowatch badge icon

EcoWatch Rating

4.8/5

Hytech Home

  • Pros icon Free Quotes
  • Pros icon Reliable Customer Support
  • Pros icon Clear Pricing Policy
  • Con icon Limited information available on website

Services Offered

  • Service icon Consultation
  • Service icon Panel Installation
  • Service icon Skilled Repairs
  • Service icon Cleaning and Maintenance

Website: https://hytechhome.com/
Address: 6 Washington Ave, Bay Shore, NY 11706
Phone: 8883943111

Methodology: How We Ranked the Best Solar Companies in Killingworth

EcoWatch's solar experts analyzed each solar company in Killingworth based on criteria such as its reputation in the industry, customer reviews, services, warranty coverage and financing. Using this solar methodology, we used the data we collected to rate and rank each company and narrow down our picks for the best solar companies in Killingworth


Below are some the criteria we examined specifically for Connecticut solar companies

  • Brand reputation and certifications (20%): We take each company's Better Business Bureau (BBB) score into consideration, as well as how long the installer has been in business (at least 5 years is required, 10 preferred) and what type of solar certifications it holds.
  • Customer reviews (20%): Trust is a top priority at EcoWatch, so we take customer experience under close consideration. We scour different review sites and customer testimonials when ranking our top solar companies, checking sites such as Trustpilot and Google Reviews. We also consider any potential complaints or lawsuits filed against these companies and award or remove points accordingly.
  • Warranty (20%): A company earns a perfect score in this category if it offers 25-year warranties that cover performance, product and workmanship. The industry standard that we measure companies against is 25-year product and performance warranties, along with a 10-year workmanship warranty. We also look closely into the track record of the post-installation support each company provides in terms of honoring its contracts
  • Solar services (10%): All of the companies we review install solar panels, but we award companies higher points if they offer additional services for customers, like battery installation, energy-efficiency audits, and EV chargers.
  • Pricing and financing (10%): It's hard to get exact quotes for solar projects, but we use marketplace research to determine how each company prices its equipment and installation services. Additionally, companies that offer more help for panel financing — like in-house loans, leases, or PPAs — score higher than those that don't.
  • Availability (10%): The bigger the service area, the higher the company will score.
  • Transparency and accessibility (5%): Solar installers that offer free consultations and easy contact methods score higher in this category.
  • Environmental, social and corporate governance factors (5%): A company earns a perfect score in this category if it offers public data disclosure, addresses end-of-life (EOL) products or processes, and demonstrates a commitment to uplifting the communities that it serves.

The Cost and Benefits of Solar in Killingworth

For a lot of homeowners, whether or not to invest in solar energy comes down to the cost.A few main factors that affect the cost of installing solar panels on your home and how much it could save you over time are:

  • Your income and budget: This affects what model of solar panels you can purchase.
  • The amount of sunlight your house gets: Due to Killingworth’s high amount of average daily sunlight, you should be able to save a decent amount on your energy bills.
  • Incentives: Along with the federal Solar Investment Tax Credit (ITC), which lets you deduct 0 of your overall installation cost, your local government may offer additional tax exemptions, credits or rebates that will help you save even more. Aside from incentives, you can save an average of $23,000 over 20 years with your solar panels, too.
  • How much electricity your home consumes: Households that need plenty of energy each month may call for more solar panels and, therefore, be more expensive, but will also save more on their energy bills over time.

Due to solar panels decreasing in cost as well as several solar incentives, they are a worthwhile investment for most homeowners.

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Solar Incentives in Killingworth

To increase the adoption of solar power, federal, state and local governments – and even some utility companies – offer incentives to help make solar more affordable and accessible.When you install solar panels on your home, you become eligible to claim the federal tax credit, or ITC. This credit currently reduces your tax bill by 0 of the cost of your solar panels. Additionally, there are often some regional incentives that you can benefit from to further save. Our article on solar incentives has more in-depth information on the incentives you can benefit from in Killingworth.

Environmental Impact of Switching to Solar in Killingworth

Going solar can have a positive effect on the environment.You may be wondering – how much do solar panels help the environment anyway? Something that can severely influence your carbon footprint is how long your commute is and how much you drive generally. If you go solar and drive an electric car, you can significantly cut back on your carbon dioxide emissions by charging your car at home.In Killingworth, the average person can reduce their carbon footprint by 40 pounds a year once they go solar. As you can see, trading traditional energy for solar has so many other rewards beyond saving money. One of the most important ones is that you can help save the planet too.

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Best Regional Coverage

Momentum Solar

★★★★★
4.5
  • Great warranty coverage
  • Representatives are experts on local policies
  • Concierge service ensures steady communication
  • Slightly limited service offerings

Best for Leasing

Sunrun

★★★★★
4.0
  • Expansive service area
  • Many financing options
  • Some reported issues with customer service
  • Some reported issues with door-to-door sales

EcoWatch's Killingworth, CT Solar Company Rankings FAQs

What is the best solar installer in Killingworth?

In Killingworth, Ion Solar Pros is the most reputable local solar company. Our team of experts rates it 4.90 stars, so it's a solid choice if you're planning on installing solar panels on your roof.

What is the negative environmental impact of solar panel manufacturing?

Manufacturing solar panels needs to use chemicals and produces toxic waste that can be harmful for the environment, which is the main downside of solar panels.

Is it worth installing solar panels on my roof?

Solar panels can be a good investment for most homeowners, but admittedly, they might not be worth it for everyone. If your home doesn't get enough sunlight or your electricity bills are already reasonably low, solar panels might not be for you.

What is the best type of solar panel?

There are three main types of solar panels: monocrystalline, polycrystalline and thin-film. As for efficiency and price, monocrystalline has the highest for both, then polycrystalline, and then thin-film. The best choice for you is highly influenced by your roof layout, how much you're willing to spend and how much efficiency you're looking for.

Our goal is to reach as many people as we can with sensible solutions like solar energy. Our team of full-time local researchers collects solar price and installation data for every city in America then compiles it to create these digestible city guides. If you want to read our solar expert’s opinion on the top solar companies featured here, follow this link.

Company research was conducted by Melissa Smith and Karsten Neumeister. Local data analysis was conducted by James Savino. See something we missed or could do better? Email the editor.