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Cosmic Solar reviews
• updated MAR 3, 2026Loading map...
The Verdict
Cosmic Solar earns our top recommendation. We analyzed hundreds of reviews and found two patterns that matter: this company delivers expert work without drama, and their crews actually seem to enjoy what they do. In one case, a homeowner watched installers remove 24 solar panels, replace a 50-year-old roof down to the deck, then reinstall everything in under a week without a single miscommunication. We counted 437 mentions of careful workmanship and 492 compliments about how smoothly projects ran. The family-run team coordinates permits, rebates, and city inspections so tightly that timelines beat projections more often than they slip. We noticed installers routinely find creative routes for conduit through attics to avoid visible runs down siding, and one crew even helped diagnose a roof leak that turned out to be unrelated to their work. (They fixed it anyway.) The only hesitation: if you want the cheapest bid on paper, you may find it elsewhere.
If you value a clean install over rock-bottom pricing, Cosmic Solar is the contractor to call. You'll pay a fair rate for premium equipment and a crew that treats your roof like it's their own.
3 Stories That Stood Out
Richard S hired Cosmic Solar and Roofing to tackle a major job on his more-than-50-year-old house: remove 24 solar panels, reroof down to the original roof deck, clean up and repair around a large skylight, fix compromised plywood, shiplap and fascia boards, then reinstall the panels. He discovered the project was handled by three coordinated teams—office managers Mary and Ashley, solar lead Johnny, and roofing lead Eddie—under owner Pey’s direction, and that seamless communication by phone, text and email kept everything moving without misunderstandings. The crew completed the entire scope in about a week, which Richard found remarkable given the age of the roof (25+ years) and the extent of hidden damage uncovered. He chose the CertainTeed Presidential Upgrade with the full warranty after speaking with CSR’s CertainTeed representative, Alex, and he personally verified the company’s licensing and insurance after CSR provided transparent documentation and encouraged him to check. He came away confident in CSR’s professionalism, and what stuck with him most was how smoothly the three teams coordinated to replace a quarter-century-old roof and reinstall two dozen panels while handing
Keith and his wife watched a local news report in early April that announced huge SDG&E rate hikes and the end of net metering 2.0, and the next morning they panicked and began calling solar companies. After interviewing several firms, they met Ken Davami from Cosmic Solar; in a 45-minute, no-pressure presentation Ken transformed them from confused to confident and won the contract. He immediately felt they were dealing with a top-tier team. Once the paperwork was signed, Ashley Alvarado became his go-to guide — fielding repeated calls about HOA and SDG&E submissions and patiently walking him through each step. Pey Shadzi, the operations manager and design specialist, then refined the panel layout to capture the sun’s path across their roof and squeeze maximum production out of the system. Installation unfolded over two hot days with installers Hector and CJ arriving early, working efficiently within the predicted timeframe, and keeping Keith informed about daily plans and progress. For the final electrical hookup, Cosmic sent master technician Javier Ortega, who tied together the SDG&E meters, the RMA and the Enphase inverter — then stayed two extra hours to be present for the
Sammy C. brought Cosmic Solar onto his ranch‑style house in 2018 after watching his electric bill climb toward $1,600 a month. He walked away from the process with no out‑of‑pocket cost and a plan that locked his electricity at $499 a month for the next 20 years; two years after installation he had saved more than $26,000 and still carried a credit balance with Edison. The crew measured his usage, laid out how many panels would be needed to offset the bill, signed a straightforward contract and completed a tidy, professional installation. Pey handled the sale with a low‑pressure, friendly approach, and the company’s follow‑up proved dependable: when a small roof leak appeared on the panel side, Sammy called and technicians arrived quickly. The leak turned out to be caused by a damaged shade sail, not the solar work, but Cosmic Solar helped anyway — Larry Schmidt came out twice to make sure the problem was fully resolved. The concrete takeaways that stuck with him were the zero upfront cost, the fixed $499 monthly payment, and the fast, accountable service when a post‑install issue cropped up.
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How We Got To Trust Score 98
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Serving customers for 17 years
Among the longest-standing installers in the market.
BBB Rating: A+
Excellent BBB standing. Strong complaint resolution.
Natural Review Patterns
Reviews were posted naturally over time.
What You Can Expect
A recommendation from a best friend of more than 50 years sent Bill Phillips to Cosmic Solar & Roofing when he decided to replace a 20‑year‑old roof and go solar. He opted for an all‑in‑one package that paired the solar array with a re‑roof done by Cosmic’s contractor, Davalos Roofing, a crew he described as top notch and not something he felt pushed into choosing. Everyone on the project listened to what he wanted and put it together the way he asked. After the first full year the system ran without issues and actually produced a bit more energy than the estimate, so he walked away with both a new roof and slightly better‑than‑expected solar performance. For a San Diego‑area homeowner looking to coordinate a roof replacement and solar install, that combined outcome is the detail he remembers most.
Ivan had a nine-year-old solar inverter on his home that wasn’t producing as much electricity as it should. He called Cosmic Solar and was referred to Khi in the Maintenance Department. Khi came out for a site evaluation, walked through the possible fixes, and together they concluded that replacing the inverter was the best course. Khi ordered the unit and kept him updated at every step. Javier carried out the install, programmed the new inverter, and the system began producing power again. What lingered from the experience was the clear communication from Khi and the smooth handoff to Javier — a concise, trouble-free replacement that restored the system’s output.
Deena Nelson chose Cosmic Solar for a residential solar install and worked directly with Jose. He guided her through the process, answered every question, and showed clear technical knowledge. The team arrived on schedule, moved quickly and professionally, and left a clean, well-done installation. She liked the result enough to send six or seven friends to Jose, and each of them ended up satisfied as well. Three years after the work was finished she can still call Jose with questions or concerns and he answers. The memorable part of her experience: the company didn’t vanish after the sale—Jose stayed available long afterward.
Mary L. had a solar system with a storage battery installed in May 2024. When she discovered the battery wasn’t charging over a weekend, she emailed Cosmic Solar’s service manager, Khi, even though the office was closed so he would see it Monday. Khi replied the same day and arranged for a technician to come out first thing. At 8:05 a.m. on Monday, technician Javier was at her door; he diagnosed the issue quickly and had the battery charging again within minutes. The installation quality had already impressed her, but what lingered was the rapid, hands-on response—an 8:05 a.m. arrival and a working system minutes later.
John Knutson chose Cosmic Solar and Roofing for a Powerwall solar installation on his home and experienced an exceptionally smooth process. He watched the team handle every step without issue — from design to completion — and came away grateful for their flawless execution. The detail that stuck with him was how effortless the whole project felt, leaving him to simply say thank you to the crew.
James discovered Cosmic Solar in a 2009 newspaper piece about solar water heaters, called them, and had a solar water heater added to supplement his home's conventional system. That first installation prompted the company to propose solar electric generation, and he was surprised when they recommended a ground‑rack array instead of rooftop panels. The ground‑mounted system went in and was up and running quickly, and more recently they installed a battery storage system. Across all three projects—the 2009 solar water heater, the ground‑mounted PV array, and the battery installation—work came completed professionally with high‑quality equipment, and each project qualified for government tax rebates. What stuck with him was the firm’s willingness to choose the solution that fit the site (the ground rack) and to handle the installations and rebate paperwork smoothly.
Oliver has worked with Cosmic Solar for more than five years, relying on Pey, Khi and Javier to handle his home’s solar and battery needs. He discovered the team repeatedly went above and beyond—not just at installation but in ongoing service and product support. He ended up so impressed by their consistency and responsiveness that he convinced several neighbors to have Cosmic install their systems too. After half a decade of steady service, the detail that sticks is how a single customer’s confidence turned into multiple neighborhood referrals.
Leslie Erb has relied on Cosmic for almost ten years to look after their home’s solar needs. Over that stretch they discovered a team that understood the equipment thoroughly, answered calls and service requests without delay, and handled work cleanly and professionally. The thing that stands out is the steady, decade-long reliability — Cosmic became the go-to company whenever maintenance or questions came up.
Xiao Xiao reached out to Cosmic Solar in late January during the NEM 3.0 rush, fully expecting a long delay — but the project moved surprisingly fast. They worked with Pey to get the ball rolling, and thanks to tight coordination between departments the rooftop system reached PTO in early April. Ron from the roofing team inspected the roof, offered straightforward opinions and competitive pricing, and kept that part efficient. When a small monitoring glitch popped up, Khi and his technicians stepped in and fixed it within two days. Two years on, Cosmic Solar again demonstrated that speed: a broken microinverter was replaced under warranty within a couple of days after it was reported. Communications stayed clear throughout, technicians remained polite and professional, and what stands out is the company’s responsiveness — installations and warranty fixes handled in days rather than weeks.
Long-term Satisfaction
Long-term satisfaction for Cosmic Solar holds steady at 5.0 ★. This is better than 76% of installers we looked at.
Long-term reviews carry the most weight in our methodology because they are most representative of what you should be paying for: a system that will perform for years.