Best solar companies California Cobex Construction Group

Cobex Construction Group Reviews

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

14verified installs in California utility records*
2recent installs, 2025-26 records*
2020first year in county records
7.5/10Solar.com Score · 544 reviews analyzed

Solar.com Installer Score for Cobex Construction Group

One score, computed the same way for every installer. We read the full text of all 544 substantive published Cobex Construction Group review texts across every platform and measure what customers actually report. Not a survey. Not a sample. Never for sale.

Solar.com Installer Score

7.5/10

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

Synthesized from 544 substantive customer review texts (618 published reviews collected).

Google 4.6★ · 507 reviewsYelp 3.8★ · 111 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.6.1

126 reviews speak to this · 89 praise · 37 complaints

Price TransparencyHow well the final price, financing terms, and incentive guidance match what customers were led to expect.5.3

88 reviews speak to this · 48 praise · 37 complaints

CommunicationHow reliably the company keeps customers informed and answers questions across sales, installation, and service.6.4

219 reviews speak to this · 155 praise · 63 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.6.7

135 reviews speak to this · 99 praise · 34 complaints

WorkmanshipThe quality, professionalism, neatness, and property care of the physical installation.7.8

341 reviews speak to this · 295 praise · 46 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.6.5

19 reviews speak to this · 14 praise · 5 complaints

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

How does Cobex Construction Group 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 Cobex Construction Group 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.
Placer County14220209.3 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.

Cobex Construction Group 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 Integrity6.1/10

Reviewers often describe the sales process as informative and organized, with several saying representatives explained options clearly and provided quotes quickly. At the same time, a meaningful share of complaints involves unclear expectations, inconsistent quotes, and pressure or follow-through concerns.Solar.com's composite of published customer feedback, not a customer quote

Clear walkthroughs. Many reviewers say the proposal process was detailed and easy to follow, with step-by-step explanations of materials, scope, and next steps. Representative review excerpt: "I had numerous estimates on a new roof and Cobex was the only company that showed me step by step the process and the products they would use."

Fast, helpful estimates. Some customers report getting quotes quickly and feeling informed during the estimate stage, especially when working under time constraints. Representative review excerpt: "I explained that we were under a bit of a time-crunch and he had a quote back to us in a couple of days."

Expectation gaps. Complaint patterns include reviews describing disputed quotes, unexpected roof recommendations, and projects that did not align with what was initially presented.

Price & financing transparency

Price Transparency5.3/10

Feedback on pricing and financing is mixed, with some reviewers describing fair quotes and helpful guidance on financing. However, complaints are frequent enough to point to recurring concerns about added charges, loan-process confusion, and changes in project cost expectations.Solar.com's composite of published customer feedback, not a customer quote

Fair pricing for some. Reviewers describe a recurring pattern in this area. Representative review excerpt: "It was a lot of money, but we got more than one quote and since theirs was just about the same as the others, but I felt like it was..."

Financing guidance. Some customers report getting help with financing and feeling supported while choosing materials and payment options. Representative review excerpt: "He helped so much with every step from choosing the material and financing .I came to know him as a very quality individual and spent several hours talking to him..."

Added-cost concerns. Other reviewers describe surprise costs, disputed pricing details, and loan or completion paperwork that felt confusing or off-track. Representative review excerpt: "They never included the additional cost to install my 4 skylights or so they said."

Communication & coordination

Communication6.4/10

Reviewers frequently praise the team for staying in touch, giving updates, and keeping projects organized from start to finish. Still, a notable number of complaints mention poor handoffs, unclear ownership, and cases where customers felt left without timely answers or accurate information.Solar.com's composite of published customer feedback, not a customer quote

Frequent updates. Many customers say they were kept informed throughout the project and appreciated clear communication as work progressed. Representative review excerpt: "The team kept me informed every step of the way, showed up when they said they would, and followed through on everything they promised."

Responsive project support. Several reviews describe project leads as easy to work with and attentive to questions during the job. Representative review excerpt: "The team was honest, easy to work with, and kept me updated throughout the project."

Coordination breakdowns. Complaints commonly focus on misleading information, weak follow-through, and customers not knowing who to contact when issues came up. Representative review excerpt: "Our project manager, Mykhailo, repeatedly gave us misleading information (especially about the permit) and seemed inexperienced and unqualified to handle this project."

Timeline reliability

Timeline Reliability6.7/10

Timeline feedback trends moderately positive, with many reviewers describing on-time work, quick completion, and steady progress. The main complaints involve projects taking longer than expected, permit-related delays, and occasional no-shows or missed notice.Solar.com's composite of published customer feedback, not a customer quote

Prompt completion. Several reviewers say jobs were finished quickly and that the crew showed up when promised. Representative review excerpt: "They completed a total roof repair in 2 days seamlessly, all awhile keeping me updated with each step."

Responsive scheduling. Some customers note that quotes or planning moved quickly when they were working within a tight timeline. Representative review excerpt: "I explained that we were under a bit of a time-crunch and he had a quote back to us in a couple of days."

Delay complaints. Other reviewers report jobs running far past the original estimate or delays tied to permits, weather, or missed appointments. Representative review excerpt: "It took 4 months when the salesman told me 3 weeks."

Workmanship & site care

Workmanship7.8/10

This is one of the stronger categories in the review set, with many customers describing professional crews, solid workmanship, and careful cleanup. Complaints are present but less common, and they tend to center on installation errors, unfinished punch-list items, or cleanup problems.Solar.com's composite of published customer feedback, not a customer quote

Professional crews. Many reviewers say the crew was professional, respectful, and careful with the property during the job. Representative review excerpt: "Very professional, very respectful of the landscaping and everything on the roof was remounted."

Cleanup and quality. Customers often mention good workmanship and cleanup after the install was complete.

Installation issues. A smaller set of complaints describes installation mistakes or cleanup concerns, including roof defects, site debris, or incomplete finishing work. Representative review excerpt: "The wrong size fascia board was installed, our sewer vent was roofed over (a major code violation that caused sewage fumes to back up into our home), and the crew..."

Long-term support & performance

Long-Term Support6.5/10

Post-install feedback is limited, but the available reviews are somewhat mixed. Some customers say the company stood behind the work after completion and that the finished project performed as expected, while others report unresolved service issues or trouble getting follow-up support.Solar.com's composite of published customer feedback, not a customer quote

Post-completion reassurance. Some reviewers say it was reassuring that support continued after the project was complete and payment had been made. Representative review excerpt: "It turns out, there wasn't a problem, but it was reassuring to know they stand behind their work even when the project is complete and all money has been paid."

Performance benefits. A few customers mention improved comfort or satisfaction with the finished roof after installation. Representative review excerpt: "Happy with my new roof, and notice my mobile home is cooler and use less AC ."

Follow-up concerns. Complaints in this category point to unresolved equipment or service problems and delays in getting help after the job.

Bottom line: Cobex Construction Group’s review profile is mixed overall, with stronger marks for workmanship than for pricing, sales, and coordination. Reviewers most often praise communication during well-run projects and professional crews, while complaints focus on timeline delays, cost clarity, and post-sale follow-through.

How this is built: category scores and summaries weigh the company's full published rating record (491 Google reviews averaging 4.6 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 Cobex Construction Group

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
2020
5
'21
5
'22
11
'23
9
'24
7
'25
1
'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 Cobex Construction Group

What do customers say in Cobex Construction Group reviews?

We analyzed 544 substantive published customer reviews of Cobex Construction Group in full. The company's Solar.com Installer Score is 7.5/10, 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 Cobex Construction Group installed?

Cobex Construction Group appears as installer of record on 14+ 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 Cobex Construction Group'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.