Best solar companies California Diamond Solar Solutions

Diamond Solar Solutions Reviews

Based in Placerville, CA. This profile is built from public installation records and published ratings, not paid placement.

58verified installs in California utility records*
16recent installs, 2025-26 records*
2021first year in county records
8.4/10Solar.com Score · 72 reviews analyzed

Solar.com Installer Score for Diamond Solar Solutions

One score, computed the same way for every installer. We read the full text of all 72 substantive published Diamond Solar Solutions review texts across every platform and measure what customers actually report. Not a survey. Not a sample. Never for sale.

Solar.com Installer Score

8.4/10

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

Synthesized from 72 substantive customer review texts (77 published reviews collected).

Google 5.0★ · 62 reviewsYelp 5.0★ · 15 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.10.0

recency-weighted star ratings across platforms

Sales IntegrityHow clearly and honestly the company explains the system, contract, savings, and incentives before you sign.7.6

28 reviews speak to this · 28 praise · 0 complaints

Price TransparencyHow well the final price, financing terms, and incentive guidance match what customers were led to expect.6.9

14 reviews speak to this · 13 praise · 1 complaints

CommunicationHow reliably the company keeps customers informed and answers questions across sales, installation, and service.8.0

33 reviews speak to this · 33 praise · 0 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.7.6

25 reviews speak to this · 25 praise · 0 complaints

WorkmanshipThe quality, professionalism, neatness, and property care of the physical installation.8.4

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.7.7

29 reviews speak to this · 29 praise · 0 complaints

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

How does Diamond Solar Solutions 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 Diamond Solar Solutions 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.
El Dorado County581620218.2 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.

Diamond Solar Solutions reviews: what customers say

An independent synthesis of published customer feedback across Google and Yelp, updated September 23, 2026. Green marks praise, amber mixed experiences, red complaints.

Sales & proposal integrity

Sales Integrity7.6/10

Reviewers describe a sales process that is clear, practical, and low-pressure. They often say the proposals made sense, the estimates were straightforward, and expectations were set clearly from the start.Solar.com's composite of published customer feedback, not a customer quote

Clear, sensible proposals. Reviewers say the team explained system choices well and provided estimates that were easy to understand. Representative review excerpt: "From the first phone call, they came to our home, evaluated the best number and placement of panels, recommended the right battery setup, and gave us a clear estimate."

No-pressure sales approach. Several reviewers describe the process as honest and competent, with recommendations that felt reasonable rather than pushy. Representative review excerpt: "My only regret is I didn't have them install the system to begin with, Thank you Diamond Solar for running an Honest, Competent enterprise."

Pricing felt justified. Some reviewers mention that the pricing and proposed setup aligned well with what they needed, including specialized design requests. Representative review excerpt: "Their pricing was the best of the three contractors we considered, and they were also the only company willing to set up a non-export system so we could preserve our..."

Price & financing transparency

Price Transparency6.9/10

Reviews are generally positive on pricing clarity, with several customers saying the company’s pricing made sense for the work and system design. The main watch-out is a small amount of negative feedback tied to post-sale financial support or follow-up around a system issue.Solar.com's composite of published customer feedback, not a customer quote

Pricing generally described as fair. Reviewers describe a recurring pattern in this area. Representative review excerpt: "Their pricing was the best of the three contractors we considered, and they were also the only company willing to set up a non-export system so we could preserve our..."

Financial expectations discussed clearly. Some reviewers say they understood the financial side of the project and the reasons for moving forward after seeing their utility costs. Representative review excerpt: "After dealing with PG&E bills well over $1,000 a month, we knew solar was the right move - but actually committing to it was a whole other story."

Isolated complaint about post-sale support. A small amount of feedback describes frustration when seeking help after a system problem, suggesting that the follow-up experience was not always smooth. Representative review excerpt: "The system was not working, when she called to get her system fixed they told her the company who installed the system had sold the company to another and they..."

Communication & coordination

Communication8.0/10

Reviewers consistently describe strong communication throughout the project. They mention quick responses, direct access to the team, and a sense that the company stayed engaged from start to finish.Solar.com's composite of published customer feedback, not a customer quote

Fast, direct responses. Reviewers say they could reach the team easily and usually got quick replies to questions. Representative review excerpt: "They were highly communicative from start to finish -- I had direct cell numbers for the team and could text questions anytime, and they usually responded very quickly, often immediately."

Responsive during active projects. Customers report that follow-up during the project was prompt and that concerns were handled without much delay. Representative review excerpt: "As with the first project I called Barak several times during the project and he was extremely responsive."

Coordination stayed engaged. Some reviewers describe working with the same team over multiple projects and say communication remained steady over time. Representative review excerpt: "We have been working with Barak and his team for a year or so now and competed a number of large projects."

Timeline reliability

Timeline Reliability7.6/10

Reviewers generally describe timelines as dependable, with work moving along at a good pace once the project was underway. Comments also suggest the company was transparent about scheduling constraints and still delivered a reasonable timeline overall.Solar.com's composite of published customer feedback, not a customer quote

Scheduling handled transparently. Reviewers say the company was honest about timing constraints and still found a workable schedule. Representative review excerpt: "They walked us through our options clearly, were honest about scheduling constraints, and still found a way to get us in on a pretty good timeline."

Install moves quickly once scheduled. Some customers report that the physical installation itself was completed quickly after the site visit and measurements. Representative review excerpt: "After the initial visit and measurements the actual install only took 2 days."

Projects reached usable activation. Reviewers describe systems moving into regular use after installation, with few signs of lingering schedule issues in the feedback. Representative review excerpt: "Since installation, we have relied entirely on our solar system, even while running the air conditioner constantly, with almost no dependence on PG&E."

Workmanship & site care

Workmanship8.4/10

Reviewers describe the installation work as professional, skilled, and efficient. Feedback also points to crews that handled equipment cleanly and completed setups without much disruption.Solar.com's composite of published customer feedback, not a customer quote

Professional installation quality. Customers often say the work was done carefully and to a high standard. Representative review excerpt: "Being in construction for fifty years I can honestly say their work was very professional and impeccable which is a rarity now days."

Skilled crew execution. Reviewers mention efficient electricians and installers who completed the setup with confidence and technical skill. Representative review excerpt: "Connor, the electrician who handled the installation, was efficient, professional, and obviously skilled, completing the entire setup in just a few hours."

Crew handled complex setups well. Some feedback highlights multi-part installs involving batteries and electrical equipment, with reviewers describing the finished work positively. Representative review excerpt: "Barak and his crew installed a 7KW solar array two Tesla batteries and a Span sub panel on our house."

Long-term support & performance

Long-Term Support7.7/10

Reviewers generally report that systems performed well after turn-on and that the company remained attentive after installation. Several comments emphasize peace of mind, working equipment, and confidence in the follow-up experience.Solar.com's composite of published customer feedback, not a customer quote

Systems reported to work well. Reviewers say the system was operating properly and delivering the expected results after installation. Representative review excerpt: "They got the job done and the system works great."

Post-install monitoring and review. Some customers waited months before posting so they could judge performance over time, and they still described the system positively. Representative review excerpt: "I waited several months to write this review, allowing me time to fully review my new expanded solar and added battery system."

Follow-up gave customers confidence. Reviewers also note that they felt taken care of after the job, which suggests decent long-term support in the available feedback. Representative review excerpt: "These systems are one of the biggest dollar items you'll end up purchasing in life outside of your home, and you need to know you are taken care of."

Bottom line: DIAMOND SOLAR SOLUTIONS has an overall Solar.com installer score of 8.4/10 based on 72 substantive reviews. Across the review corpus, most feedback is positive, with especially strong marks for communication, workmanship, and sales clarity. Price transparency is a little more mixed than the other categories, and there is a small amount of complaint-based feedback around post-sale financial follow-up and support.

How this is built: category scores and summaries weigh the company's full published rating record (62 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 Diamond Solar Solutions

Company background from published business information and licensing records.

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.
2
2021
10
'22
21
'23
22
'24
12
'25
8
'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 Diamond Solar Solutions

What do customers say in Diamond Solar Solutions reviews?

We analyzed 72 substantive published customer reviews of Diamond Solar Solutions in full. The company's Solar.com Installer Score is 8.4/10, 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 Diamond Solar Solutions installed?

Diamond Solar Solutions appears as installer of record on 58+ 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 Diamond Solar Solutions' 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.