which solar installer
can you trust?
California>Campbell
WattBot
REPORTS
customers trust
OSullivan
Green
Solar

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TRUST
SCORE
97
#2 of 14
solar installers
in Campbell
WattBot Certified
platforms monitored
Yelp logoYelp
46 reviews,
4.9
SolarReviews logoSolarReviews
EnergySage logoEnergySage
BBB logoBBB
Google logoGoogle
WattBot Certified

OSullivan Green Solar is WattBot Certified.

Only 5% of 20,000+ companies earned this badge.Over 60% of solar installers have "excellent ratings" on Google, Yelp and more. We independently analyze them to find the ones you can really trust.

What Stood Out

OSullivan Green Solar's story in 3 reviews.
Yelp
Michael S.
Mar 14, 2025

I could not be happier with this business. It's been a few years since we had our PV system installed (I didn't realize I didn't previously write a review), but Tim has been a great partner and I'm so glad that we found him. The made the installation process smooth as silk. They took care of everything and made it so easy. Tim is incredibly friendly and helpful. I would recommend this business to anyone considering solar and/or storage.

Yelp
Les L.
Dec 12, 2023

Update: after Tim installed our solar panels in 2019, we experienced at least 4 power outages with one lasting almost 2 days. We decided to look into battery power to go with the solar panels. Based on our past experience with Tim, our call went to Tim to inquire adding the batteries. He responded quickly and after a site survey and a follow up meeting we had had a contract for the battery installation. Installers met the battery delivery truck and started in the installation right away. The installers excellent. They were very neat and answered all my questions. The installation looks great. After the installation was complete, Tim was there to bring the batteries on line and show me how to use the FranklinWH app. We are very happy with the whole battery backup installation experience. Added plus, the batteries look great at night!

Yelp
Kim L.
Aug 18, 2025

You know Tim has been in the business for years because he really knew his stuff and I truly appreciate that he works with you right from the start. From initial quote to install and inspections, he's right there all along the way. We started inquiring with solar installers after getting cold called for a lease, and we quickly realized that solar would be great. After reviewing almost a dozen different proposals from companies large and small, we decided to go with Tim and OSullivan Green Solar. We have an almost Eichler style roof, which meant we didn't have an attic and needed the supports to hit the beams and it needed to be right. While we were soliciting solar quotes, many of them didn't know or didn't give us a confident answer on how they would install until we signed, and that was not going to work with us. Tim is different and that's where his experience shines through. He was able to walk through how they would install the supports so that they'd stay in place without anything coming through the shallower beams. That gave us confidence that our install would work well and we weren't going to do a system that our roof couldn't handle. Overall, Tim's quote was right in line with a lot of the other installers and we felt he was very fairly priced given his experience and insight. We've had our system running for several weeks now and it's been awesome. We ended up going with REC solar panels, Enphase, and Franklin WH - all of it easily set up and handled with Tim's help. All in all, the process was quite quick and Tim was very responsive. The longest pull was getting inspections and PGE settled, but the OSullivan team handled it all for us. Highly recommend - so much so that our neighbors down the street also went with Tim after chatting with us!

Performance by Work Type

SOLAR

SOLAR

Installation, permitting, and grid connection.

4.9
ROOFING

ROOFING

Repair or replacement, before or after solar installation.

5.0
BATTERY

BATTERY

Energy storage for backup savings and independence.

5.0
COMPLEX PROJECTS

COMPLEX PROJECTS

Multi-trade installations requiring co-ordination.

Insufficient data
ELECTRICAL

ELECTRICAL

Panel upgrades and wiring for system readiness.

Insufficient data
SERVICE

SERVICE

Repairs, maintenance, and ongoing system support.

Insufficient data

How We Got To 97

1. Aggregate

We tracked down every review for this company on the internet.

Yelp logoYelp
46 reviews,
4.9
SolarReviews logoSolarReviews
EnergySage logoEnergySage
BBB logoBBB
Google logoGoogle

2. Weight

We weight each review based on how useful it is for new customers.

Up-Weighted
45Verified customers
2Long-term customers
18Recent
0Complaints
Down-Weighted
0Unfair
0Empty
1Shoppers

3. Analyze

We analyzed each review for five signals of work quality.

Sales Conduct98% positive
Workmanship100% positive
Project Management98% positive
Post-Sale Support96% positive
Value100% positive

4. Screen

We screened the company for other signals not captured by star ratings.

Serving customers for 11 years
BBB Rating: A+
Natural Review Patterns
Licensed Contractor

5. Score + Rank

We combined everything into a score and rank against the market.

TRUST
SCORE
97

Clean Record

Screening for serious allegations from verified customers about solar/battery work.

Unauthorized Activities

Passed screening

We checked for:
Unauthorized charges
Undisclosed loans
Identity theft
Forged signatures
Fake contracts
Falsified permits

Misleading Claims

Passed screening

We checked for:
Bait & switch
Overstated savings
Hidden fees
Misrepresented specs
False performance
Misleading warranty

Background Check

What reviews alone do not reveal about the company's track record and business practices.

Serving customers for 11 years

Operating longer than most installers in the market.

BBB Rating: A+

Excellent BBB standing. Strong complaint resolution.

Natural Review Patterns

Reviews were posted naturally over time.

Licensed Contractor

A valid contractor license is on record.

What You Can Expect

What quality signals exist across the customer journey?
Yelp
Michael S.
Positive
Mar 14, 2025

I could not be happier with this business. It's been a few years since we had our PV system installed (I didn't realize I didn't previously write a review), but Tim has been a great partner and I'm so glad that we found him. The made the installation process smooth as silk. They took care of everything and made it so easy. Tim is incredibly friendly and helpful. I would recommend this business to anyone considering solar and/or storage.

Yelp
Les L.
Positive
Dec 12, 2023

Update: after Tim installed our solar panels in 2019, we experienced at least 4 power outages with one lasting almost 2 days. We decided to look into battery power to go with the solar panels. Based on our past experience with Tim, our call went to Tim to inquire adding the batteries. He responded quickly and after a site survey and a follow up meeting we had had a contract for the battery installation. Installers met the battery delivery truck and started in the installation right away. The installers excellent. They were very neat and answered all my questions. The installation looks great. After the installation was complete, Tim was there to bring the batteries on line and show me how to use the FranklinWH app. We are very happy with the whole battery backup installation experience. Added plus, the batteries look great at night!

Yelp
Kim L.
Positive
Aug 18, 2025

You know Tim has been in the business for years because he really knew his stuff and I truly appreciate that he works with you right from the start. From initial quote to install and inspections, he's right there all along the way. We started inquiring with solar installers after getting cold called for a lease, and we quickly realized that solar would be great. After reviewing almost a dozen different proposals from companies large and small, we decided to go with Tim and OSullivan Green Solar. We have an almost Eichler style roof, which meant we didn't have an attic and needed the supports to hit the beams and it needed to be right. While we were soliciting solar quotes, many of them didn't know or didn't give us a confident answer on how they would install until we signed, and that was not going to work with us. Tim is different and that's where his experience shines through. He was able to walk through how they would install the supports so that they'd stay in place without anything coming through the shallower beams. That gave us confidence that our install would work well and we weren't going to do a system that our roof couldn't handle. Overall, Tim's quote was right in line with a lot of the other installers and we felt he was very fairly priced given his experience and insight. We've had our system running for several weeks now and it's been awesome. We ended up going with REC solar panels, Enphase, and Franklin WH - all of it easily set up and handled with Tim's help. All in all, the process was quite quick and Tim was very responsive. The longest pull was getting inspections and PGE settled, but the OSullivan team handled it all for us. Highly recommend - so much so that our neighbors down the street also went with Tim after chatting with us!

Long-term Satisfaction

Reviews from customers who hired OSullivan Green Solar more than a year ago reveal warranty service, customer support quality, and real-world performance data. These are dimensions that recent customers cannot yet evaluate.

Review History

How many reviews have been collected from each year?