Sierra Solar Cleaners

Solar energy company · Nevada City, CA

What the listing shows you

5.0★

105 Google reviews

What it doesn’t

under 1%

rated 1–2★

typical in California, 1%

Newest review held

Aug 2026

newest held review this month

Google's rating breakdown · all 105 reviews

Rated 1–2★: under 1%; typical in California, 1%
Posted an update: —; we saw no owner post, which is not the same as none existing
Replies to reviewers: 99%; of the 105 reviews we hold

Its one and two star share is level with the typical installer in California. Across California, 769 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 105 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

48%

13%

10%

13%

15%

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. Sierra Solar Cleaners is in the highlighted group.

What reviewers said

1★ · around April 2026
I have hesitated to write this review, but after several months, and talking with others, I think it's important. I hired Sierra Solar Cleaners to clean my house's windows on three occasions. The first two times, they did a great job, but the third time, several of my windows were scratched up, some of them quite deeply. I noticed shortly after they left and contacted Michael, the owner, who came to the house and was flustered because he was short staffed and implied that I was "taking up his time." We looked at the window streaks together, and while some of them (higher up - I did not have a

5★ · around August 2026 · the company replied
They will my crew from now best service ever my solor and Windows look like they were spit shined great job Michel and they cleaned up after beautifully
5★ · around June 2026 · the company replied
Michael and his crew did a fantastic job on my windows. This is the third year I’ve had him and he is very responsible for taking notes of my concerns and following through to where I have no concerns anymore. My screens were so clean I couldn’t even see them through the window. I’ve already made an appointment with him for 2027.
5★ · around June 2026 · the company replied
When Michael said that between power washing and window cleaning, he could make our house look close to new, I thought he was overselling; he wasn't. The only thing that would have made the place look better would have been painting the entire exterior. He and Kelly were both great to deal with, the price was totally reasonable and I'm already recommending him to friends and neighbors.

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

cleanliness 58
solar panel cleaning 27
gutter guard installation 9
work quality 7
moss removal 4
courteous staff 4
honest team 4
scheduling 3
screen repair 2
value for money 2
efficient crew 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 free estimate, insured and licensed, but not in a sentence we can quote cleanly.

Elsewhere

Google also lists this company under chimney, gutters, pool service, pressure washing, roofing and windows. A company that does both roofing and solar can handle the roof work a panel install often needs.
It posts on Instagram and Facebook. A page that stopped posting years ago tells you something a listing will not.

When they say they are open

Sunday: 8 a.m. to 7 p.m.
Monday: 8 a.m. to 7 p.m.
Tuesday: 8 a.m. to 7 p.m.
Wednesday: 8 a.m. to 7 p.m.
Thursday: 8 a.m. to 7 p.m.
Friday: 8 a.m. to 7 p.m.
Saturday: 8 a.m. to 7 p.m.

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.

Metro Window and Solar Cleaning Resource5.0★ · 1
Cody's Windows4.8★ · 21
Top Tier Window Cleaning4.8★ · 25
Corrie's Complete Cleaning5.0★ · 49

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 Grass Valley

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.

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