Best Solar Companies in Massachusetts: How to Compare

Last reviewed: October 23, 2026

The short answer. No official body ranks Massachusetts solar companies, so the “best” one is the installer that checks out on the things you can verify: current state licenses, who physically installs the system, warranty terms in writing, and a Google rating backed by a large number of reviews. The table below puts five installers that serve Massachusetts homes side by side using only what each company, or a named review platform, publishes. Use it as a template for your own quotes.

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Massachusetts Solar Companies Compared

This table lists five installers that serve Massachusetts homes, in alphabetical order. Google ratings come from each company’s Google Business Profile, read on the date shown. Every other cell comes from the source linked in the last column. Where a company does not publish something, the cell says “not stated”. “Not stated” means we could not find it, not that the company lacks it. Ratings change daily, so treat each figure as a snapshot and check the live profile before you decide.

Massachusetts Solar Companies Compared
Company	HQ and region served	Crews	Rating (platform, review count, date read)	Warranty as the company publishes it	Source
Beacon Solar	Swansea, MA. Lists CT, MA and RI	Profile says design, installation and service “are all done by Beacon”	Google: 4.8 stars from 125 Google reviews (Beacon Solar Construction listing, Berkley) and 4.9 stars from 67 Google reviews (sales office listing, Swansea), read 2026-10-23. EnergySage 5.0 from 8 reviews (read 2026-10-18).	30-year workmanship warranty from Solar Insure covering the system and, on roof-mounted systems, roof penetrations, in addition to manufacturer warranties	EnergySage profile
Evergreen Solar	Pawtucket, RI office address in site footer. Says it serves MA, RI, CT, NJ and PA	Not stated	Google: 4.9 stars from 375 Google reviews (read 2026-10-23)	Q.Tron panels “backed by a 25-year product warranty and 25-year performance guarantee”. Workmanship term: not stated	goevergreen.solar
Isaksen Solar	Fall River, MA. Lists MA, RI, CT and NH	“All technicians are highly trained employees, not contractors”	Google: 5.0 stars from 656 Google reviews (read 2026-10-23). EnergySage 5.0 from 4 reviews (read 2026-10-18)	“We always offer a 25-year warranty on your solar panels.” Workmanship term: not stated	isaksensolar.com, EnergySage profile
Rooftop Power	Warehouse in Warwick, RI. Serves RI, MA and CT	In-house crews, not subcontractors	Google: 4.9 stars from 904 Google reviews (updated daily from Google). BBB A+ accredited. 4,000+ projects, solar and roofing together	Workmanship warranty covers labor and roof for up to 25 years from install date. Every new roof carries a 50-year warranty (roof only, not the solar equipment). Equipment terms follow each manufacturer	Rooftop Power, EnergySage profile, BBB profile
Summit Energy	Mansfield, MA. Lists CT, ME, MA, NH, RI and UT	Not stated	Google: 4.7 stars from 834 Google reviews (read 2026-10-23). EnergySage 4.5 from 68 reviews (read 2026-10-18).	“Industry Leading 30 Year Equipment and Labor Warranty; 25 year roof penetration warranty”	EnergySage profile

A few notes on reading the table honestly:

Different platforms are not the same number. A Google rating, an EnergySage rating and a BBB grade measure different customer pools. We did not average or blend them.
A rating is only as good as its volume. Five stars from 4 or 8 reviews has barely been tested. A 4.8 or 4.9 across hundreds of reviews is a pattern.
Ratings on a company’s own website are self-reported. They are usually pulled from Google, but you can confirm them in one step by searching the company name on Google Maps.
Warranty wording is not interchangeable. “25-year warranty” can mean the panels, the labor, the roof penetrations, or all three. See the warranty section below.
We did not include companies whose public profiles do not list Massachusetts as a service area. A national brand can run ads in your area without installing there.

Rooftop Power is in this table because homeowners will compare us anyway. We are not claiming the top spot. We are showing the evidence in the same format for everyone, and you can check every row yourself.

How We Compared

These are the same criteria we suggest you apply to any quote, including ours.

1. Licensing

Massachusetts splits solar credentials across more than one office, and a company can hold one without the others. Check each by name before you sign:

Home improvement contractor (HIC) registration. Required for contractors doing work on existing owner-occupied homes of 1 to 4 units. Look the company up by name or registration number at the state’s contractor lookup: contractorhub.mass.gov.
Construction supervisor license (CSL). A separate credential from the HIC registration. Ask for the number and confirm it with the state’s Office of Public Safety and Inspections.
Electrician license. The electrical side of a solar system is licensed work. Ask for the electrical business license number and the master electrician’s number, and search them in the state license lookup run by the same office. Start at the Office of Public Safety and Inspections.

Compare what the lookup returns with what the installer told you. Do not rely on a number printed on a flyer or website alone. For reference, Rooftop Power lists Massachusetts electrical business license 916-EL-A1 in its site footer, and you should run it through the same lookup as everyone else’s.

2. Crews Versus Subcontractors

Ask who physically installs the system and who they work for. Some companies sell solar and hand the installation to another firm. That is not automatically bad, but it changes who answers your call in year three. In the table, a company is credited with in-house crews only where its own materials say so. Everything else is “not stated”, and it is a fair question to put to any of them.

3. Warranty Layers

A solar project carries several separate warranties, and each has a different owner:

Panel (equipment) warranty. The panel maker warrants the product and, usually, its output over time.
Inverter warranty. The inverter maker warrants it on a separate timeline, often shorter than the panels.
Workmanship warranty. The installer’s promise about its own work. It is only as strong as the company standing behind it years from now.
Roof penetration coverage. Panels are fastened through the roof. Ask whether the workmanship warranty explicitly covers leaks at those penetrations, and for how long.

Ask for each in writing with the responsible company’s name and the start date. Then ask what happens to the workmanship warranty if the installer is sold or closes. Some installers back theirs with a third-party insurer, as Beacon’s profile describes.

4. Review Volume and Recency

Look at the star rating and the number of reviews together, then sort by newest. A high rating on a dozen reviews is easy to produce. Read the most recent reviews for how problems were handled, not only for praise. Note which platform each number comes from.

5. Complaint History

Check the Better Business Bureau profile for the company name and any prior names, and read how complaints were answered. A resolved complaint tells you more than a blank record. Also search the company name with the words “delay” or “refund” and see what appears.

6. Red Flags

Any one of these is a reason to slow down and ask more questions:

A guaranteed savings figure before anyone has seen your roof and utility bills.
High-pressure tactics, or a deal that is only available if you sign today.
Vague answers on licenses, crews or warranty length.
Quotes that hide the panel and inverter brands.
Pricing that only appears after you sign something.
Reluctance to share Massachusetts references or a link to real reviews.

Best Solar Panel Company: Panel Brand or Installer?

When people search “best solar panel company” they usually mean one of two different things, and the answer differs.

Panel manufacturers make the hardware: the panels, and separately the inverters and batteries. Their warranties cover the product and its output over time. Brand matters, but a premium panel installed badly performs badly.

Installers design the system, pull the permits, mount the equipment, wire it and connect it to your utility. For a Massachusetts home, the installer determines most of what goes right or wrong: roof layout, permitting, interconnection with Eversource, National Grid or Unitil, and who you call when something fails.

So compare in this order. First choose an installer you can verify. Then ask that installer which panel and inverter brands are in the quote, why those, and who honors each warranty. A quote that hides equipment brands fails the first test. Compare equipment on the model number and warranty documents, not on the brand name alone.

Best Residential Solar Companies: What Matters for a Home

Residential work differs from commercial work in ways that affect who is a good fit:

Roof condition. Your roof has to carry panels for the life of the system. Ask every installer what the plan is if your roof needs work first. Some companies only install solar and refer roofing out. Rooftop Power does both roofing and solar, which lets a needed replacement run as one project, but you should ask every company on your list the same question and get the answer in writing.
Permitting and utility experience. Ask how often the company connects systems in your utility’s territory, and how long its recent Massachusetts interconnections took.
Incentive knowledge. A good installer can explain the incentives that apply to your home and show the source. Our Massachusetts solar incentives guide lists them with current program rules.
Ownership structure. Purchase, loan, lease and power purchase agreement (PPA) are different contracts. With a lease or PPA, the system is typically owned by a third party rather than by you. Ask the installer to say plainly who will own the system and what it costs over the full term, and compare that line by line against the other quotes.
A quote built on your bill. The proposal should start from your actual electricity usage and show system size, equipment and price in writing.

If you want to test whether solar fits your home at all before comparing companies, read Are Solar Panels Worth It in Massachusetts.

Best Solar Installers Near Me

“Near me” in Massachusetts has a practical meaning: does the company actually install in your town, and will its crews come back for a service call?

Check the service area on the company’s own page. Every company in the table is headquartered in southeastern Massachusetts or Rhode Island. A company that lists your state may still be a long drive from your town.
Ask for recent installs near you. A genuine local installer can name streets or towns it has worked in and offer references.
Ask who answers the service line. Is it the same company that installed the system?
Look at the town and utility. Eversource, National Grid, Unitil and some municipal lighting plants each have their own interconnection process.

See where Rooftop Power installs on our Massachusetts service area page.

How to Check a Solar Company in Massachusetts

This takes about fifteen minutes and is worth doing for every company on your shortlist, in this order:

Look up the HIC registration by company name at contractorhub.mass.gov. Confirm the name, status and expiration.
Look up the construction supervisor license and the electrician license through the state’s Office of Public Safety and Inspections. Match the numbers on the proposal to the lookup.
Search the company on Google Maps. Note the rating, the review count and the newest reviews. Read the owner’s replies to the lowest ratings.
Check the BBB profile for the rating, accreditation status and complaint history.
Ask who installs. Get the answer on crews versus subcontractors in writing.
Get every warranty in writing, with the responsible company named for each layer.
Ask what happens if the company disappears. Our guide What to Do If Your Solar Company Disappears in Massachusetts explains the options and why the workmanship warranty matters.
Compare at least three written quotes side by side before you sign anything.

Where Rooftop Power Fits

We are one of the installers in the table, so judge us by the same checklist. What we publish: Massachusetts electrical business license 916-EL-A1, in-house installation crews rather than subcontractors, a 4.9 rating on Google, BBB A+ accreditation, and more than 4,000 projects across solar and roofing. We also handle roofing, so a roof that needs replacement before panels go on can be handled as one project.

You do not have to take our word for any of it. Run the license through the state lookup, read the Google reviews sorted by newest, and ask us for the warranty documents in writing. If another installer’s quote is stronger on your home, that is useful information too.

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FAQ

Frequently Asked Questions

Who is the best solar company in Massachusetts?

There is no official ranking, so be wary of anyone who claims a single number one. The better question is which installer holds current Massachusetts licenses, installs with its own crews, puts every warranty layer in writing, and has a strong rating across many reviews. The comparison table above shows how five installers that serve Massachusetts look on those points, using only published information.

How do I check whether a Massachusetts solar company is licensed?

Ask for the home improvement contractor registration number, the construction supervisor license number and the electrician license number. Look each one up with the state, through contractorhub.mass.gov and the Office of Public Safety and Inspections, and confirm the name and status match what the installer told you.

What is the difference between the best solar panel brand and the best installer?

The panel brand determines the hardware and its manufacturer warranty. The installer determines design, installation quality, permitting, utility connection and who services the system. Choose a verifiable installer first, then ask which brands are in the quote and who stands behind each warranty.

What warranties should a solar quote include?

Look for four layers: the panel warranty, the inverter warranty, the installer’s workmanship warranty, and coverage for roof penetrations. Each can have a different length and a different company behind it. Ask for all four in writing with the start date and the responsible company named.

Does a higher Google rating mean a better installer?

Not by itself. A rating means more when it is backed by a large number of reviews and when recent reviews show how problems were resolved. A 5.0 from a handful of reviews has barely been tested. Compare the rating and the review count together, and note which platform each number comes from.

Where We Install in Massachusetts

Rooftop Power installs solar across southeastern and central Massachusetts. Find your town:

Attleboro Bellingham Dartmouth Dighton Easton Fall River New Bedford Rehoboth Seekonk Somerset Swansea Taunton Uxbridge Wareham Westport Worcester

All Massachusetts service areas