Best solar companies California Green Solar

Green Solar Reviews

California installer. This profile is built from public installation records and published ratings, not paid placement.

329verified installs in California utility records*
38recent installs, 2025-26 records*
2016first year in county records
8.5/10Solar.com Score · 60 reviews analyzed

Solar.com Installer Score for Green Solar

One score, computed the same way for every installer. We read the full text of all 60 substantive published Green Solar review texts across every platform and measure what customers actually report. Not a survey. Not a sample. Never for sale.

Solar.com Installer Score

8.5/10

Blends the six category scores (70%) with the recency-weighted star record (30%).

Synthesized from 60 substantive customer review texts (62 published reviews collected).

Google 5.0★ · 5 reviewsYelp 4.9★ · 57 reviews

Updated September 28, 2026 · No installer can pay to change this score · How scores work →

Read what customers actually say ↓
Review star recordRecency-weighted star ratings across platforms, converted to a 0-10 signal before it is blended into the headline Solar.com Score.9.9

recency-weighted star ratings across platforms

Sales IntegrityHow clearly and honestly the company explains the system, contract, savings, and incentives before you sign.7.7

34 reviews speak to this · 34 praise · 0 complaints

Price TransparencyHow well the final price, financing terms, and incentive guidance match what customers were led to expect.7.1

9 reviews speak to this · 9 praise · 0 complaints

CommunicationHow reliably the company keeps customers informed and answers questions across sales, installation, and service.8.3

42 reviews speak to this · 41 praise · 1 complaints

Timeline ReliabilityHow well the company manages the path from contract through permits, installation, inspection, and turn-on — without the customer having to chase it.7.8

34 reviews speak to this · 34 praise · 0 complaints

WorkmanshipThe quality, professionalism, neatness, and property care of the physical installation.8.5

43 reviews speak to this · 43 praise · 0 complaints

Long-Term SupportHow well the system performs after turn-on, how the company handles monitoring, warranty claims, and service calls — and its staying power to honor them.8.0

18 reviews speak to this · 18 praise · 0 complaints

#76 of 678 scored in California by Solar.com Installer Score

How does Green Solar compare where you live? Rankings are local; an installer that leads one city can trail in the next. See how they rank in your city →

Why this differs from star ratings: most five-star reviews say “great company” and stop, and star averages reward that. These category scores only count reviews with concrete evidence, weighted by recency and the reviewer’s track record. A company can hold a strong star average while specific categories score lower; that gap is usually where the real story is. Categories with more complaints than praise are the questions worth asking any bidder, not necessarily dealbreakers.

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Where Green Solar builds

County-by-county activity from CPUC records through May 2026.

What this data covers: *Counts on this page, including the totals up top, come from investor-owned-utility interconnection records (SCE, SDG&E, PG&E). Work in municipal-utility territory, such as LADWP or city utilities, and outside California does not appear here, so this company's true totals are higher than shown. Unlike the county rankings, this profile also shows counties below the 250-install ranking floor.

CountyVerified installsRecent 2025-26Active sinceMedian system% leasedCounty rankingLink to the county ranking page. This company's rank on this page is its Solar.com Installer Score rank, shown above.
Santa Clara County2683420166.1 kW0.0%See county ranking →
San Mateo County41420196.2 kW0.0%below ranking floor (under 250 installs)
Alameda County20020205.8 kW0.0%below ranking floor (under 250 installs)

% leased counts systems recorded as third party owned (lease or power purchase agreement); the remainder are customer owned. Median system size is the middle system this company installed in that county. Star ratings and review counts are from Google.

Green Solar reviews: what customers say

An independent synthesis of published customer feedback across Google and Yelp, updated September 28, 2026. Green marks praise, amber mixed experiences, red complaints.

Sales & proposal integrity

Sales Integrity7.7/10

Reviewers describe Green Solar’s sales process as clear and low-pressure, with proposals that matched home-specific needs. The feedback is uniformly positive in this category, and reviewers frequently mention confidence in the quoted scope and expectations.Solar.com's composite of published customer feedback, not a customer quote

Home-specific proposals. Reviewers say the company took time to understand the property and put together proposals that fit the project rather than pushing a generic package. Representative review excerpt: "He understood exactly what was needed for our home solar project and put together a proposal that was great for us."

Clear contract expectations. Some reviewers describe flexibility around timing after signing, including situations where they wanted to lock in a utility plan while leaving installation timing open. Representative review excerpt: "We had a signed contract in March, locking in NEM 2, and he gave complete flexibility for timing of the actual installation, given it was at least 6 months out."

Confidence in the plan. Reviewers also note that the team could explain how the install would work and gave them confidence before work began. Representative review excerpt: "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..."

Price & financing transparency

Price Transparency7.1/10

Reviews describe pricing and financing conversations as straightforward, with little mention of surprise costs or refund issues. The overall tone is positive, though the evidence base is smaller than in some other categories.Solar.com's composite of published customer feedback, not a customer quote

Fair pricing. Reviewers say they were able to reach a fair or reasonable price and felt the numbers were explained clearly. Representative review excerpt: "We are an elderly couple and he was excellent helping us understand everything and giving us a fair price."

No surprise costs. Some customers report that the final experience stayed aligned with the original discussion, with no unexpected add-ons called out in the feedback. Representative review excerpt: "No surprises, competitive prices, great communication and timeliness: I'm very happy with this install, from the initial contact with the company to install completion it has been an easy, stress..."

In-person explanation. Reviewers also note that the team came to the home, reviewed the proposal, and walked through the electrical setup before moving forward. Representative review excerpt: "Of them, Tim was the only person to come to my home and discuss the proposal and look at the electrical setup."

Communication & coordination

Communication8.3/10

Reviewers consistently describe strong communication, with responsive follow-up and good coordination across project steps. One review mentions needing the company back for additional electrical work and panels, but the broader pattern is still overwhelmingly positive.Solar.com's composite of published customer feedback, not a customer quote

Responsive contact. Reviewers repeatedly say the team was reachable, easy to work with, and quick to respond to questions or updates. Representative review excerpt: "Tim at O'Sullivan Green Solar is very responsive and easy to work with."

Coordinated handoffs. Some customers describe smooth coordination with roofers and other project steps, with the company taking ownership of timing and communication. Representative review excerpt: "He is very responsive, very reasonable, and coordinated well with our roofers to install the solar mounts once the plywood decking went on, so then the roofers could shingle around..."

Follow-through on the project. Reviewers also say the company stayed involved through the process and followed up carefully as work moved along. Representative review excerpt: "Rare to see such dedication and follow up for the customer, but Tim was with us each step of the way."

Timeline reliability

Timeline Reliability7.8/10

Reviewers generally report that Green Solar kept projects moving and handled permitting, inspections, and utility activation without major issues. The category is strongly positive overall, with only occasional complexity tied to upgrades or multiple approvals.Solar.com's composite of published customer feedback, not a customer quote

Permit and utility follow-through. Reviewers say the team handled legwork with the utility and helped move systems through approval and activation. Representative review excerpt: "Purchased a new house that had solar installed and Tim did all leg work to work with PG&E, ensure the system was approved, and ultimately activated."

Coordinated scheduling. Some customers describe the company timing work around roofing or other construction so the project could proceed in the right order. Representative review excerpt: "He is very responsive, very reasonable, and coordinated well with our roofers to install the solar mounts once the plywood decking went on, so then the roofers could shingle around..."

Complex projects managed well. When projects involved panel upgrades, inspections, or permits, reviewers still describe the process as managed and completed. Representative review excerpt: "My panel needed upgrade, multiple inspection and permits were involved."

Workmanship & site care

Workmanship8.5/10

Reviewers describe high-quality installation work, careful site handling, and professional crews. The evidence here is uniformly positive, including comments about special roof conditions and smaller follow-up jobs being handled with care.Solar.com's composite of published customer feedback, not a customer quote

Quality installation. Reviewers say the installations were done well and inspired confidence that the system would work with the roof structure. Representative review excerpt: "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."

Attention to detail. Some customers note that the owner stayed invested in getting the outcome right, even on smaller maintenance work. Representative review excerpt: "Even though this was just a small maintenance project of an existing installation, the owner was really invested in achieving a perfect outcome."

Professional crew. Reviewers also describe the team as careful and quality-focused throughout the job. Representative review excerpt: "O'Sullivan Green Solar did an outstanding job installing solar panels on my house."

Long-term support & performance

Long-Term Support8.0/10

Reviewers describe helpful support after installation, including guidance on monitoring, repairs, and follow-up questions. The post-install feedback is strongly positive, with comments that the company remained involved when systems needed attention or special handling.Solar.com's composite of published customer feedback, not a customer quote

Post-install guidance. Some reviewers mention receiving practical help with monitoring setup and other system details after installation. Representative review excerpt: "He also gave me a tip on how to setup ethernet on the inverter so I don't have to pay for the monitoring, which I really appreciate."

Support with special roof setups. Customers with unusual roof conditions say the team knew how to handle the install in a way that fit the structure and system needs. Representative review excerpt: "I have a metal tile roof and most solar companies will not install on it, however Tim's team knows how to install on a metal tile roof and provides the..."

Responsive follow-up. Reviewers also report quick responses and follow-up meetings when they were considering battery or other added work. Representative review excerpt: "He responded quickly and after a site survey and a follow up meeting we had had a contract for the battery installation."

Bottom line: Green Solar’s review profile is broadly positive across all six categories, with especially strong marks for communication, workmanship, and long-term support. Pricing and proposal transparency are also viewed favorably, and the few complaint signals in the corpus are rare relative to the overall review volume.

How this is built: category scores and summaries weigh the company's full published rating record (5 Google reviews averaging 5.0 stars), the most recent and most relevant review texts, and recurring feedback themes verified acrossGoogle and Yelp. Ratings and review excerpts from published review sources. Refreshed as new feedback is published. No installer can pay to change it.

About Green Solar

Company background from published business information and licensing records.

Also files CPUC records as: Osullivan Green Solar.

Products

Solar

Service area

California. Note: the install counts on this page cover California investor-owned-utility records only.

Work for this company or see something out of date? Profiles can be claimed and corrected: contact partners@solar.com. Placement on solar.com is never for sale.

Recorded installs by year

Residential interconnections statewide in PG&E, SCE, and SDG&E records through May 2026.
1
2014
5
'15
1
'16
26
'17
30
'18
33
'19
38
'20
46
'21
49
'22
54
'23
27
'24
31
'25
7
'26

Important context: this chart shows investor-owned-utility records only. Companies that shift work toward municipal-utility territory (LADWP and city power departments) or other states will show declining bars here even while building steadily elsewhere, and 2025-26 records also lag real installation dates. Treat this as a partial window, not the company's full trajectory.

FAQ about Green Solar

What do customers say in Green Solar reviews?

We analyzed 60 substantive published customer reviews of Green Solar in full. The company's Solar.com Installer Score is 8.5/10, with category-level detail on this page covering sales integrity, price transparency, communication, timeline reliability, workmanship, and long-term support.

How many solar systems has Green Solar installed?

Green Solar appears as installer of record on 329+ residential systems in California investor-owned-utility interconnection records through May 2026. Work in municipal-utility territory or other states does not appear in those public records.

How can I compare Green Solar's pricing?

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How we built this data

Methodology: Counts are residential PV interconnections in investor-owned-utility territory (PG&E, SCE, SDG&E) per CPUC Rule 21 public records through May 2026. Postal and name variants are merged. Municipal utility territory such as LADWP, Glendale, Pasadena, Burbank, Anaheim, and Riverside Public Utilities is not included in those CPUC counts. Counts show recorded installations, not quality ratings. Reported costs are self-reported on owned-system interconnections. No installer can pay for placement.

Who we are: Solar.com is a solar marketplace — we connect homeowners with installers and earn a fee when projects move forward. These rankings and scores are computed from public installation records and published customer reviews. No installer can pay for placement, and no installer — including those we work with — can pay to change a score.