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Solar Installer GuildUnited States · independent

South Mountain Company

Solar energy company · Vineyard Haven, MA

What the listing shows you

5.0★

3 Google reviews

What it doesn’t

0%

rated 1–2★

typical in Massachusetts, 2%

Newest review held

Nov 2025

newest held review 10 months old

Google's rating breakdown · all 3 reviews

Rated 1–2★
0%
typical in Massachusetts, 2%
Posted an update
—
we saw no owner post, which is not the same as none existing
Replies to reviewers
0%
of the 3 reviews we hold

Its one and two star share is 2 points below the typical installer in Massachusetts. Across Massachusetts, 107 of the 198 installers whose breakdown Google has published carry a higher share than this one.

The percentages are Google’s own arithmetic over every review it holds, not a sample we assembled. Separately we hold 3 review texts for this company, quoted below. Google publishes review ages rather than dates, so every date here is approximate.

Every company we hold in Massachusetts, on one axis

none

1–5%

6–10%

11–20%

over 20%

Every company we hold in Massachusetts whose Google breakdown has been read, grouped by their share of one and two star reviews. South Mountain Company is in the highlighted group.

What reviewers said

  • 5★ · around September 2021

    Being a couple of design professionals, remote from the island, it was important that we trust the team. Quality, artistry, and stewardship of resources were our priorities. We experienced skill and care beyond our expectations and a bonus: we made friends for life.

  • 5★ · around September 2021

    South Mountain demonstrates deep attachment to the Vineyard’s values: collaboration, transparency, and respect for their surroundings. Their work shows that teams who have aligned around core values can produce exceptional work.

Reviewer names are not published here. Negative reviews are shown first because they are the ones a listing hides, not because they are more representative.

What the company says about itself

Taken from its own website. We have not checked any of it, and a sentence on a website is not evidence.

  • Years in business

    “impact the world around them. For more than 50 years, we've embodied our values of…”

Elsewhere

  • Google also lists this company under roofing. A company that does both roofing and solar can handle the roof work a panel install often needs.
  • It posts on LinkedIn, Instagram and Pinterest. A page that stopped posting years ago tells you something a listing will not.

When they say they are open

Sunday
Closed
Monday
8 AM to 4 PM
Tuesday
8 AM to 4 PM
Wednesday
8 AM to 4 PM
Thursday
8 AM to 4 PM
Friday
8 AM to 4 PM
Saturday
Closed

As Google published them when we last read the listing, not a live check. Ring before you drive anywhere.

Who Google shows alongside them

Google’s own “people also viewed” set, in Google’s order. It is Google’s comparison, not ours.

  • Harvest Sun Solar5.0★ · 1
  • Southwest Construction5.0★ · 2

The ones without a link have no page here, either because Google does not categorise them as solar businesses or because we could not match the name to a listing with confidence.

Other installers in Massachusetts

1–2★3★4★5★gauge 0–20%typical here, 2%

Ordered by how much we can tell you about each, which is not an order of quality. We do not know which of these is better and would not say if we did.

What we don't know

  • The date above is the newest review we hold, which is not necessarily the newest that exists — we hold a large share of Google's reviews, not all of them.
  • We do not verify licences, insurance or bonding. Nothing here has been checked against a state licensing board.
  • We cannot tell you what an installation costs, and we hold nothing about the equipment they fit.

Something wrong here? Tell us and a person will read it.

Do you run South Mountain Company?

Claim this listing to become its verified contact: correct your own phone number, hours and description, and hear first if anything here changes. Free, reviewed by a person — and it changes nothing about the numbers.

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