Best solar companies California Sunternal Construction

Sunternal Construction Reviews

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

804verified installs in California utility records*
6recent installs, 2025-26 records*
2021first year in county records
7.0/10Solar.com Score · 107 reviews analyzed

Solar.com Installer Score for Sunternal Construction

One score, computed the same way for every installer. We read the full text of all 107 substantive published Sunternal Construction review texts across every platform and measure what customers actually report. Not a survey. Not a sample. Never for sale.

Solar.com Installer Score

7.0/10

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

Synthesized from 107 substantive customer review texts (145 published reviews collected).

Google 4.2★ · 145 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.8.8

recency-weighted star ratings across platforms

Sales IntegrityHow clearly and honestly the company explains the system, contract, savings, and incentives before you sign.6.4

42 reviews speak to this · 29 praise · 12 complaints

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

18 reviews speak to this · 8 praise · 9 complaints

CommunicationHow reliably the company keeps customers informed and answers questions across sales, installation, and service.6.3

57 reviews speak to this · 44 praise · 13 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.6.0

42 reviews speak to this · 32 praise · 10 complaints

WorkmanshipThe quality, professionalism, neatness, and property care of the physical installation.6.8

46 reviews speak to this · 40 praise · 6 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.6.7

31 reviews speak to this · 22 praise · 8 complaints

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

How does Sunternal Construction 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 Sunternal Construction 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 County351320215.7 kW4.3%See county ranking →
Monterey County124020214.8 kW2.4%below ranking floor (under 250 installs)
Los Angeles County113020216.2 kW0.0%below ranking floor (under 250 installs)
San Benito County55020215.4 kW1.8%See county ranking →
Alameda County40020224.6 kW0.0%below ranking floor (under 250 installs)
San Francisco County37220215.2 kW0.0%below ranking floor (under 250 installs)
San Mateo County24020215.6 kW4.2%below ranking floor (under 250 installs)
Santa Cruz County23120214.5 kW8.7%below ranking floor (under 250 installs)
Contra Costa County21020216.9 kW0.0%below ranking floor (under 250 installs)
San Bernardino County16020216.7 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.

Sunternal Construction reviews: what customers say

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

Sales & proposal integrity

Sales Integrity6.4/10

Reviewers more often describe Sunternal's sales and proposal process as clear, attentive, and not overly aggressive, with several saying questions were answered and follow-up was strong. Complaint patterns still appear around pressure, door-to-door outreach, and cases where reviewers felt the sales approach or expectations were not handled carefully.Solar.com's composite of published customer feedback, not a customer quote

Attentive, low-pressure sales. Several reviewers say the sales experience felt helpful and straightforward, with reps answering questions and following up without making unrealistic promises. Representative review excerpt: "John was a great salesman who didn't make ridiculous promises and made sure to follow up, and Vickie was a fantastic project manager, who was ready to do what was..."

Customer-focused guidance. Reviewers also describe feeling valued during the sales process and say they appreciated the service-oriented approach. Representative review excerpt: "I really appreciate their "customer service" attitude and how, as the customer, they made me feel like I was truly valued, and that Sunternal truly deserved my business."

Pressure and expectation concerns. Some reviewers report pushy outreach or say the sales process created expectations that later did not match the project experience. Representative review excerpt: "The sales agent gave us a sales pitch that if all goes well, solar will be installed in less than 8 weeks."

Price & financing transparency

Price Transparency5.3/10

Feedback on pricing and financing is mixed to negative overall. Some reviewers say the financing felt reasonable and the overall cost made sense to them, but a meaningful share report confusion about reimbursements, billing, deposits, or unexpected cost timing.Solar.com's composite of published customer feedback, not a customer quote

Billing and reimbursement issues. Other reviewers report confusion or frustration around reimbursements, billing, or other cost-related follow-through after the sale. Representative review excerpt: "They tell me I will be reimbursed for the payments and yet I've only seen one check for one month when I have submitted three months worth of bills to..."

Financing felt workable. A few reviewers say the pricing and financing structure felt reasonable for the value they expected from the system. Representative review excerpt: "I will be some time before I know the bottom line as SCE is a variable, but the cost was so reasonable with the available financing, I'm not worried at..."

Project cost seemed manageable. Some customers describe the investment as worthwhile and say the overall cost fit their long-term plans. Representative review excerpt: "I realize that solar is a big investment but for me the security it gives me and the confidence in a solid long-term investment is well worth the money I..."

Communication & coordination

Communication6.3/10

Reviewers generally describe Sunternal as responsive and organized during many projects, with frequent updates and helpful project management. Still, a noticeable minority report difficulty getting answers, inconsistent internal communication, or slow follow-up when issues needed escalation.Solar.com's composite of published customer feedback, not a customer quote

Responsive project management. Many reviewers say the team kept them updated, answered questions quickly, and coordinated well across the project. Representative review excerpt: "They kept us posted throughout the project, were quick to answer any questions or concerns that we had, and provided several useful tips to help us maximize the benefits of..."

Clear status updates. Customers also note that communication flowed well and that project managers stayed engaged through the process. Representative review excerpt: "I appreciated the communication flow with keeping me updated on the status of the project, and I appreciated the Sunternal team that worked on my solar panel project."

Hard to get answers. Some reviewers report trouble getting clear responses or say they had to push repeatedly for updates and resolution. Representative review excerpt: "Its really hard to get answers from them, they have no communication between them whatsoever."

Timeline reliability

Timeline Reliability6.0/10

Timeline feedback is mostly positive but not uniform. Many reviewers describe smooth scheduling, quick movement through inspections, and projects that stayed on track, while others report delays, missed expectations, or slow progress when permitting or activation issues came up.Solar.com's composite of published customer feedback, not a customer quote

Fast movement through steps. Several reviewers say Sunternal moved quickly on scheduling, installation, and inspection-related steps. Representative review excerpt: "Either it was the installation or setup the inspection, Sunternal team was on it with the quickness."

Project stayed on schedule. Some customers describe the process as orderly from scheduling through city inspections and say they were able to wait without managing the details themselves. Representative review excerpt: "From scheduling inspections, installation, licensing and city inspections, we just sit and relax and just wait for it to be done."

Delay and inspection complaints. Other reviewers report long delays or problems tied to inspection timing and project completion. Representative review excerpt: "City inspection did not happen until late May and they had installed my panels incorrectly (crossed the property line of my shared roof with my neighbor)."

Workmanship & site care

Workmanship6.8/10

Workmanship and site-care feedback trends positive overall, with many reviewers saying the installation looked good, the crew was professional, and the work passed inspection or was handled efficiently. The main complaints center on roof damage, panel-placement issues, and a smaller set of concerns about follow-up repairs or added charges for corrections.Solar.com's composite of published customer feedback, not a customer quote

Professional installation teams. Many reviewers describe the installation crew as efficient and professional, with work completed to their satisfaction. Representative review excerpt: "I got installed an year a ago, and everything went really well with the installation."

Good cleanup and appearance. Some customers say the finished system looked great and that the installation process, including inspection-related follow-up, went smoothly. Representative review excerpt: "I even have had a few people who have walked and driven by my home that have commented “those are gorgeous solar panels”."

Roof and repair complaints. A smaller group reports roof damage, installation mistakes, or concerns about the cost and handling of needed fixes. Representative review excerpt: "They damaged our roof and took no responsibility ."

Long-term support & performance

Long-Term Support6.7/10

Long-term support and system performance reviews are mostly favorable, with customers noting solid production, useful monitoring tools, and systems that operated as expected after turn-on. Even so, some reviewers describe slow service follow-up, unresolved repair requests, or the need to keep pushing for billing or performance help after installation.Solar.com's composite of published customer feedback, not a customer quote

Strong monitoring and performance. Several reviewers say the system has been working well and that production tracking or smart features have been useful. Representative review excerpt: "I love the Enphase technology that help me track my productions every day."

System operating well after turn-on. Customers also report that the system has been running properly in the early post-install period. Representative review excerpt: "The system has been operating for two months now, and it’s working perfectly!"

Service follow-up gaps. Some reviewers say getting post-install support took too long or required repeated follow-up to resolve issues. Representative review excerpt: "Although, the Installation Crew did a 10 +++ job I’ve been waiting since June 01, 2020 for someone to respond to my service request."

Bottom line: Sunternal’s review profile is broadly positive but uneven, with strengths in communication, workmanship, and many installation timelines. The most consistent pressure points are pricing transparency, sales expectations, and slower post-install support when problems need follow-up.

How this is built: category scores and summaries weigh the company's full published rating record (145 Google reviews averaging 4.2 stars), the most recent and most relevant review texts, and recurring feedback themes verified acrossGoogle. Ratings and review excerpts from published review sources. Refreshed as new feedback is published. No installer can pay to change it.

About Sunternal Construction

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.
90
2021
287
'22
296
'23
174
'24
6
'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 Sunternal Construction

What do customers say in Sunternal Construction reviews?

We analyzed 107 substantive published customer reviews of Sunternal Construction in full. The company's Solar.com Installer Score is 7.0/10, 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 Sunternal Construction installed?

Sunternal Construction appears as installer of record on 804+ 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 Sunternal Construction'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.