Best solar companies California Sunstack Solar

Sunstack Solar Reviews

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

0verified installs in California utility records*
0recent installs, 2025-26 records*
n/afirst year in county records
7.9/10Solar.com Score · 22 reviews analyzed

Solar.com Installer Score for Sunstack Solar

One score, computed the same way for every installer. We read the full text of all 22 substantive published Sunstack 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

7.9/10

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

Synthesized from 22 substantive customer review texts.

Google 5.0★ · 20 reviewsYelp 5.0★ · 2 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.7.3

3 reviews speak to this · 3 praise · 0 complaints

Price TransparencyHow well the final price, financing terms, and incentive guidance match what customers were led to expect.6.8

1 reviews speak to this · 1 praise · 0 complaints

CommunicationHow reliably the company keeps customers informed and answers questions across sales, installation, and service.7.5

8 reviews speak to this · 8 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.7.1

6 reviews speak to this · 6 praise · 0 complaints

WorkmanshipThe quality, professionalism, neatness, and property care of the physical installation.7.5

13 reviews speak to this · 13 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.6.0

6 reviews speak to this · 6 praise · 0 complaints

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

How does Sunstack 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 Sunstack 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.

% 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.

Sunstack 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 Integrity7.3/10

The available feedback centers on strong trust in the consultation process rather than pressure or surprises.Solar.com's composite of published customer feedback, not a customer quote

Honest, knowledgeable sales guidance. Reviewers say the sales experience felt straightforward and credible, with the representative described as honest and extremely knowledgeable. Representative review excerpt: "I was so wrong in thinking that this would just be another solar salesman to shop away; Levi was super honest, extremely knowledgeable and arguably the most competent person of..."

Pricing proposal positioning. Reviewers describe a recurring pattern in this area. Representative review excerpt: "After getting three quotes, SunStack Solar stood out as the most competitive for the same-sized system and battery."

Clear expectations. Feedback also suggests the proposal process matched customer expectations and did not leave reviewers describing confusion about what was being offered. Representative review excerpt: "I always felt like they had my home’s energy needs in mind, and I was the one making the final call."

Price & financing transparency

Price Transparency6.8/10

Review evidence on pricing and financing is limited, but the available comment is positive.Solar.com's composite of published customer feedback, not a customer quote

Pricing quoted price. Reviewers describe a recurring pattern in this area. Representative review excerpt: "After getting three quotes, SunStack Solar stood out as the most competitive for the same-sized system and battery."

Limited finance detail in reviews. The review corpus does not provide broader detail on financing terms, so the transparency assessment here is based on a single favorable price-related comment. Representative review excerpt: "After getting three quotes, SunStack Solar stood out as the most competitive for the same-sized system and battery."

Communication & coordination

Communication7.5/10

Reviewers consistently describe responsive communication and steady coordination throughout the project. The feedback emphasizes clear answers, regular updates, and a sense that the team kept the process moving.Solar.com's composite of published customer feedback, not a customer quote

Responsive to questions. Reviewers say calls and questions were handled well, with the team described as helpful and thorough in answering concerns. Representative review excerpt: "Even after I called a couple times and had some questions and they were always great and answered all my questions."

Kept customers updated. Some reviewers report being kept informed at each step of the process, which they felt reflected good project ownership. Representative review excerpt: "They keep you appraised during every step of the process, they do things right."

Start-to-finish support. Another reviewer describes working with the team as an outstanding experience from beginning to end, reinforcing the overall coordination score. Representative review excerpt: "Working with Serena and Levi at Sunstack Solar was an outstanding experience from start to finish."

Timeline reliability

Timeline Reliability7.1/10

Reviewers generally describe projects as finishing on time or ahead of schedule. The available feedback also includes positive mentions of inspection sign-off and efficient scheduling, with no recurring complaint pattern in this set.Solar.com's composite of published customer feedback, not a customer quote

On-time completion. Reviewers say the job was completed on time, reflecting dependable execution against the stated schedule. Representative review excerpt: "The company was professional, and completed the job on time."

Ahead of schedule. Some feedback notes that the work finished slightly ahead of schedule, which reviewers viewed as a plus. Representative review excerpt: "Everything he explained to me & my family was spot on accurate and the work was finished slightly ahead of schedule - another plus!"

Smooth inspection closeout. Reviewers also mention that final inspection went well and that the installation was completed efficiently and right on schedule. Representative review excerpt: "When the inspector came to sign off for final inspection he said what a good job they did."

Workmanship & site care

Workmanship7.5/10

Reviewers describe the installation and cleanup work positively, with attention to detail showing up across multiple comments. The feedback also includes examples of troubleshooting and site-specific follow-through, rather than complaints about damage or sloppy work.Solar.com's composite of published customer feedback, not a customer quote

Detailed troubleshooting. One reviewer says the team reviewed an existing system, identified gaps, and got the system working again. Representative review excerpt: "Levi and Ivy reviewed our existing system, found gaps, including 10 panels that weren’t connected, and got everything working."

Clean, efficient install. Reviewers describe installations as efficient, clean, and well done, with good results at final review. Representative review excerpt: "The installation was completed faster than we expected—efficient, clean, and right on schedule."

Strong cleanup and finishing work. Another reviewer highlights the attention to detail in the cleaning and finishing work, describing the crew’s effort favorably. Representative review excerpt: "Our panels have never been cleaned this way before, and I’m not talking about using deionized water, pressure washers or brushes - it was the attention to detail, elbow grease..."

Long-term support & performance

Long-Term Support6.0/10

This category is more limited than the others, but the available reviews are still favorable. Reviewers mention post-install troubleshooting, dependable service, and cleaning support meant to keep systems operating well, though the sample does not provide broader long-term warranty detail.Solar.com's composite of published customer feedback, not a customer quote

Post-install troubleshooting. Reviewers say the team returned to identify system gaps and get everything working, which points to useful support after the initial installation. Representative review excerpt: "Levi and Ivy reviewed our existing system, found gaps, including 10 panels that weren’t connected, and got everything working."

Dependable follow-up service. Some reviewers describe the service as dependable, suggesting customers felt supported after turn-on. Representative review excerpt: "I highly recommend Sunstack Solar for their quality of work and dependable service."

Limited warranty detail. The review set includes positive mentions of ongoing support, but it does not provide much detail about warranty handling or longer-term repair response. Representative review excerpt: "I also liked that they offer a guaranteed, professional cleaning service so my solar panels can work at optimum efficiency."

Bottom line: Across 22 substantive reviews, SunStack Solar is described most positively for communication, workmanship, and schedule reliability, with sales and pricing also landing favorably. The weakest area is long-term support and performance, mainly because the review sample offers less detail there, not because reviewers report a clear complaint pattern.

How this is built: category scores and summaries weigh the company's full published rating record (20 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 Sunstack Solar

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.
8
2025
3
'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 Sunstack Solar

What do customers say in Sunstack Solar reviews?

We analyzed 22 substantive published customer reviews of Sunstack Solar in full. The company's Solar.com Installer Score is 7.9/10, 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 Sunstack Solar installed?

Sunstack Solar appears as installer of record on 0+ 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 Sunstack 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.