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Solar Installer GuildUnited States · independent

603 Solar

Solar energy company · Exeter, NH

What the listing shows you

5.0★

170 Google reviews

What it doesn’t

under 1%

rated 1–2★

typical in the Manchester area, 0%

Newest review held

Jul 2026

newest held review this month

Google's rating breakdown · all 170 reviews

Rated 1–2★
under 1%
typical in the Manchester area, 0%
Posted an update
—
we saw no owner post, which is not the same as none existing
Replies to reviewers
51%
of the 170 reviews we hold

Its one and two star share is 1 point above the typical installer in the Manchester area. Across New Hampshire, 14 of the 43 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 170 review texts for this company, quoted below. Google publishes review ages rather than dates, so every date here is approximate.

On the New Hampshire ranking

The strongest review record in New Hampshire →

Ordered by the share of one and two star reviews, weighted by how many reviews stand behind it. It ranks review records, not workmanship.

Every company we hold in the Manchester area, on one axis

0% rated 1–2★10%

Each mark is one company we hold in the Manchester area whose Google breakdown has been read, placed by its share of one and two star reviews. 603 Solar is the red one. The amber line is the middle of that set, which includes suppliers and maintenance businesses as well as installers.

What reviewers said

  • 5★ · around July 2026 · the company replied

    STOP - See alert below!!! If you are checking reviews before buying a solar system you have found the right company. 603 Solar is: - Professional - Knowledgeable - Flexible - Zach delivers on his promises and no BS. ... Just like it used to be in the old days. 603 Solar has just installed a high quality system for us using high quality components. UPDATE During the first month, the system produced 3.6 MWh which if billed by Central Maine Power would cost between $880 to $970. In other words it equals a paycheck of approx $1,500 that I would have to earn BEFORE TAXES, ALERT Be on extreme alert

  • 5★ · around July 2026 · the company replied

    603 Solar is been amazing. They are professional, timely, and great communicators. We were blown away by how seamless and easy the whole process was.

  • 5★ · around June 2026 · the company replied

    Outstanding Experience I had an amazing experience with 603 Solar. Everything was on time, communication was fast, and the support was excellent from the very first visit through post‑installation. The whole process was smooth, professional, and absolutely flawless. I highly recommend 603 Solar to anyone considering going solar.

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 reviewers keep mentioning

  • solar installation 30
  • smooth process 18
  • installation team 11
  • quick installation 11
  • friendly crew 9
  • responsive staff 8
  • panel installation 5
  • competitive pricing 4
  • clean installation 2
  • no pressure sales 2

Topics Google derives from the review text, with how often each appears. A frequent topic is not a good one: “price” turns up in praise and in complaints alike.

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.

  • Warranty

    “of PV system, capacity, reliability, warranty, price and products from the top tier…”

  • Established

    “company based in Exeter, NH. Since 2018 we have helped nearly 1,000 home and…”

  • Insured

    “with professional, licensed, and insured Master Electrician’s who have…”

  • Licensed

    “array! We partner with professional, licensed, and insured Master Electrician’s who…”

Elsewhere

  • It is also reviewed on ConsumerAffairs and the Better Business Bureau. Worth reading before you sign anything: those are a different crowd, and the complaints that reach the Better Business Bureau rarely reach Google.
  • It posts on LinkedIn, Instagram and Facebook. A page that stopped posting years ago tells you something a listing will not.

When they say they are open

Sunday
Closed
Monday
9 a.m. to 5 p.m.
Tuesday
9 a.m. to 5 p.m.
Wednesday
9 a.m. to 5 p.m.
Thursday
9 a.m. to 5 p.m.
Friday
9 a.m. to 5 p.m.
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.

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 around Manchester

1–2★3★4★5★gauge 0–20%typical here, 0%

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.

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