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Solar Installer GuildUnited States · independent

SunPower®

Solar energy company · San Ramon, CA

What the listing shows you

3.6★

405 Google reviews

What it doesn’t

32%

rated 1–2★

typical in California, 1%

Newest review held

Sep 2025

newest held review 11 months old

Google's rating breakdown · all 405 reviews

Rated 1–2★
32%
typical in California, 1%
Posted an update
—
we saw no owner post, which is not the same as none existing
Replies to reviewers
91%
of the 404 reviews we hold

Its one and two star share is 31 points above the typical installer in California. Across California, 142 of the 1,529 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 404 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 California, on one axis

none

1–5%

6–10%

11–20%

over 20%

Every company we hold in California whose Google breakdown has been read, grouped by their share of one and two star reviews. SunPower® is in the highlighted group.

What reviewers said

  • 1★ · around September 2025

    This company is a fraud. Sandra Smith hired my company to swap the inverter for her customer in Georgia and then never paid us. Their invoice is overdue and they're ignoring our calls. We're going to have to put a LIEN on their customer's property.

  • 1★ · around September 2025

    DO NOT USE COMPLETE SOLAR. THEY CHARGED ME FOR WORK THEY NEVER DID, do not return phone calls, do not assign case numbers, do not return calls, nothing but lies and more lies

  • 1★ · around September 2025

    I can't tell you enough do not go with this company they are apparently doing new installs and not taking care of the past installs they have completed. THey do not answer their phone and have no answer for failing systems. if I could rate them zero stars I would have I have had 2 micro converters go out in july of last year and I have yet to get a response

  • 3★ · around August 2023 · the company replied

    So everything has been smooth and everything was completed since March 2023.. Gianna has not been any help in getting back to let us know what’s happening with the interconnection part through my power company and now we are almost in August!! Isn’t this against the contract of only needing to wait 2-3weeks for the interconnection to take place. Well it’s way beyond that. I see there was some discrepancies on complete solars part and got an email back in June about interconnection delays. What’s really going on??

  • 5★ · around August 2024 · the company replied

    Everyone I've dealt with is professional and friendly. It's a big company that offered me and my mother solar at a reasonable price. For that reason, I completely understand when things take time to get done. I'm also far from their service representatives who drive a long way to help. I feel they represent "solar for everyone"---not just the rich. My mom and I will be their customers for 25 years--very exciting!

  • 5★ · around August 2024 · the company replied

    Very great service ,communication and easy process. Highly recommend.

  • 5★ · around August 2024 · the company replied

    I want to thank Ronal Castellón for giving us the best customer service, he was very kind to us, he was very professional, and a good gentleman 👍🏽👍🏽👍🏽👍🏽👍🏽👍🏽👍🏽 …

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 panel installation 46
  • permits 25
  • easy to work with 18
  • smooth process 17
  • professional installers 14
  • permit process 8
  • project timeline 6
  • roof installation 4
  • informative staff 4
  • email response time 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.

    Its website also mentions warranty, free estimate and established, but not in a sentence we can quote cleanly.

    Elsewhere

    When they say they are open

    Sunday
    Closed
    Monday
    9 AM to 6 PM
    Tuesday
    9 AM to 6 PM
    Wednesday
    9 AM to 6 PM
    Thursday
    9 AM to 6 PM
    Friday
    9 AM to 6 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.

    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 San Ramon

    1–2★3★4★5★gauge 0–20%typical here, 1%

    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 SunPower®?

    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.

    Claim this listing