15 Best Solar Companies in Williamstown, MA (2024 Reviews)

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

  • Customer review scores
  • Service area for Williamstown, MA
  • Company policies and services offered
  • Accreditations and certifications

Average Williamstown homeowner saves $1,766/year with solar panels

By EcoWatch Local Advisors

Data Analysis: James Savino

Ranking Methodology: Karsten Neumeister

Updated February 01, 2024

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 Williamstown

If you’re looking for the best solar companies in Williamstown, combing through so many options can be challenging, but it can pay off since adopting solar energy can offer so many great perks. Plus, eco-conscious government support resulted in surging numbers of solar companies, setting the groundwork for a clean and lucrative future in the state.


There are tons of installers to choose from, but in this article, we’ll help you pin down your options by recommending some of the best solar companies in Williamstown.To help you figure out if solar panels are something you should get for your home, you can get a free, no-obligation quote from one of the best solar companies in Williamstown by clicking the button below.

Best National Provider

SunPower

★★★★★
5.0

  • Most efficient panels on the market
  • National coverage
  • Cradle to Cradle sustainability certification
  • Great warranty coverage
  • Expensive
  • Customer service varies by local dealer

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 Williamstown

Best Local Installer
ecowatch badge icon

EcoWatch Rating

5.0/5

New England Solar + Green

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

Services Offered

  • Service icon Residential Panels
  • Service icon Battery Storage
  • Service icon Financing Assistance
  • Service icon Maintenance
  • Service icon Consultation

Website: http://www.nesolarandgreen.com/
Address: 65 North St, Williamstown, MA 01267
Phone: 4134584966
Outstanding Local Installer
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EcoWatch Rating

3.0/5

BPVS

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

Services Offered

  • Service icon Commercial Panels
  • Service icon Consultation
  • Service icon Residential Panels
  • Service icon Permit Assistance

Website: http://www.bpvs.com/
Address: 60 Roberts Dr #109, North Adams, MA 01247
Phone: 4136640152
Outstanding Local Installer
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EcoWatch Rating

4.6/5

Kasselman Solar

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

Services Offered

  • Service icon Battery Storage
  • Service icon Residential Panels
  • Service icon Financing Assistance
  • Service icon Commercial Panels

Website: https://kasselmansolar.com/
Address: 279 Broadway Building 2, Menands, NY 12204
Phone: 5184788365
Outstanding Local Installer
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EcoWatch Rating

3.0/5

High Peaks Solar

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

Services Offered

  • Service icon Maintenance
  • Service icon Consultation
  • Service icon Residential Panels
  • Service icon Commercial Panels
  • Service icon Battery Storage
  • Service icon Solar Carports

Website: http://www.highpeakssolar.com/
Address: 180 Main Ave, Wynantskill, NY 12198
Phone: 5182096727
Outstanding Local Installer
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EcoWatch Rating

4.7/5

PV Squared Solar (Pioneer Valley Photovoltaics)

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

Services Offered

  • Service icon Consultation
  • Service icon Maintenance
  • Service icon Commercial Panels
  • Service icon Residential Panels
  • Service icon Permit Assistance
  • Service icon Financing Assistance
  • Service icon Battery Storage

Website: http://www.pvsquared.coop/
Address: 311 Wells St, Greenfield, MA 01301
Phone: 4137728788
Outstanding Local Installer
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EcoWatch Rating

4.4/5

AEC Solar

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

Services Offered

  • Service icon Residential Panels
  • Service icon Commercial Panels
  • Service icon Consultation
  • Service icon Battery Storage
  • Service icon Tesla Powerwall

Website: http://aecsun.com/
Address: 210 Washington Ave Ext, Albany, NY 12203
Phone: 5182138786
Outstanding Local Installer
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EcoWatch Rating

3.0/5

Seed Solar, Electric and Engineering

  • 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 Commercial Panels
  • Service icon Residential Panels
  • Service icon Consultation
  • Service icon Maintenance

Website: http://seedsolar.com/
Address: 405 Jordan Rd, Troy, NY 12180
Phone: 8005800248
Outstanding Local Installer
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EcoWatch Rating

5.0/5

Northeast Solar

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

Services Offered

  • Service icon Commercial Panels
  • Service icon Battery Storage
  • Service icon Residential Panels
  • Service icon Permit Assistance
  • Service icon Consultation

Website: https://northeast-solar.com/
Address: 136 Elm St, Hatfield, MA 01038
Phone: 4132476045
Outstanding Local Installer
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EcoWatch Rating

4.9/5

Insight Solar

  • Pros icon Informative Resources
  • 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 Consultation
  • Service icon Financing Assistance
  • Service icon Solar Roof Assessment
  • Service icon Residential Panels

Website: https://www.getinsightsolar.com/
Address: 59C North St, Hatfield, MA 01038
Phone: 4133387555
Outstanding Local Installer
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EcoWatch Rating

4.9/5

Valley Solar

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

Services Offered

  • Service icon Full-Service
  • Service icon Residential Panels
  • Service icon Off-Grid Solar Systems
  • Service icon Battery Storage
  • Service icon Tesla Powerwall
  • Service icon Financing Assistance
  • Service icon Consultation
  • Service icon Maintenance
  • Service icon Commercial Panels
  • Service icon Solar Carports

Website: http://valleysolar.solar/
Address: 116 Pleasant St Suite 321, Easthampton, MA 01027
Phone: 4135848844
Outstanding Local Installer
ecowatch badge icon

EcoWatch Rating

3.0/5

Greenfield Solar

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

Services Offered

  • Service icon Financing Assistance
  • Service icon Commercial Panels
  • Service icon Permit Assistance
  • Service icon Battery Storage
  • Service icon Maintenance
  • Service icon Residential Panels

Website: http://www.solargreenfield.com/
Address: 2 Fiske Ave, Greenfield, MA 01301
Phone: 4137723122
Outstanding Local Installer
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EcoWatch Rating

4.6/5

PosiGen

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

Services Offered

  • Service icon Battery Storage
  • Service icon Consultation
  • Service icon Permit Assistance
  • Service icon Maintenance
  • Service icon Solar Panel Upgrades
  • Service icon Energy Efficiency Audit
  • Service icon Residential Panels

Website: https://www.posigen.com/
Address: 280 Moody St, Ludlow, MA 01056
Phone: 4132389281
Outstanding Local Installer
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EcoWatch Rating

3.0/5

Beyond Green Construction

  • Pros icon Reliable Customer Support
  • Pros icon Family-Operated Business
  • Pros icon Informative Resources
  • Con icon Limited information available on website

Services Offered

  • Service icon Commercial Panels
  • Service icon Solar Panel Upgrades
  • Service icon Residential Panels

Website: http://www.beyondgreen.biz/
Address: 13 Terrace View, Easthampton, MA 01027
Phone: 4135290544
Outstanding Local Installer
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EcoWatch Rating

4.5/5

HB Energy Solutions

  • 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 Commercial Panels
  • Service icon Emergency Services
  • Service icon Residential Panels
  • Service icon Maintenance

Website: https://www.hbenergy.com/
Address: 132 Bridge St, Springfield, VT 05156
Phone: 8028852300
Outstanding Local Installer
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EcoWatch Rating

3.0/5

Sunnyside Solar

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

Services Offered

  • Service icon Residential Panels
  • Service icon Maintenance
  • Service icon Commercial Panels
  • Service icon Off-Grid Solar Systems

Website: https://www.sunnysidesolar.com/
Address: 5805 Calvin Coolidge Memorial Hwy, Guilford, VT 05301
Phone: 8022807319

Methodology: How We Ranked the Best Solar Companies in Williamstown

EcoWatch's solar experts analyzed each solar company in Williamstown 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 Williamstown


Below are some the criteria we examined specifically for Massachusetts 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 Williamstown

While solar panels can save you a good amount of money on energy bills over time, it’s important to take into consideration the upfront costs.There are several factors you should consider when trying to determine costs and your potential savings, including:

  • The type of solar panels you want: More efficient models are more highly priced, so that will affect your budget for your solar project.
  • average energy usage: The more energy your home consumes on average and the steeper your current power bills are, the more likely you'll benefit from switching to solar.
  • Incentives: The federal solar investment tax credit, which can save you some money, lets you deduct 0 of the cost of your solar system installation from your taxes. Plus, not including incentives, you can save about $21,000 over 20 years on your energy bills.
  • Your current electric bills: Solar panels can greatly reduce, or completely eliminate, your utility bills. In Williamstown, you can save an average of $1,723 a month.

There are many good benefits of solar in spite of the upfront cost of installation. It can help the planet and your bank account. Additionally, it can boost the value of your home, leading to even more benefits if you decide to sell your home later.

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Solar Incentives in Williamstown

Although installing solar panels is typically a big investment, it can save you much money over time due to smaller utility bills and government incentives.On top of the federal tax credit incentive, there are also some local programs, which in most cases, stack with the federal incentive, so you can save even more. For detailed information about incentives that apply to you, see our article on solar incentives.

Environmental Impact of Switching to Solar in Williamstown

Switching to solar energy can have a beneficial effect on the environment.You may be wondering – how much do solar panels help the planet anyway? If your home uses lots of energy, you can help the environment even more by switching to solar power.Although making solar panels emits carbon dioxide, the panels make up for it by considerably lowering the amount of CO2 you would have produced if you still used nonrenewable energy. In Williamstown, you can reduce your carbon footprint by 40 pounds a year with solar panels. For people who want to help the environment, the upfront cost of solar is a small price to pay for the offset carbon emissions.

Best National Provider

SunPower

★★★★★
5.0

  • Most efficient panels on the market
  • National coverage
  • Cradle to Cradle sustainability certification
  • Great warranty coverage
  • Expensive
  • Customer service varies by local dealer

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 Williamstown, MA Solar Company Rankings FAQs

What is the best solar installation company in Williamstown?

The top local solar company in Williamstown is New England Solar + Green, with a rating of 5.00 stars.

What is the negative environmental impact of making solar panels?

Solar panels can be harmful for the environment when manufacturers use toxic chemicals in the manufacturing process. Chemicals can make solar panels difficult to dispose of safely once they’ve reached the end of their lifespan. Solar panel manufacturing needs a lot of energy as well. The energy payback period is about 1 to 4 years.

How long does it take for solar to pay for itself?

The average payback period for solar panel installation is about 12.9 years, but the exact period varies by local electricity costs, incentives and net metering programs.

When should I install solar panels?

You can put up solar panels whenever it's convenient for you, but consider doing so in the winter when the demand is less. With fewer homeowners going solar, you could potentially see faster installation times and more savings.

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.