Diablo Solar Services reviews
• last updated FEB 26, 2026Loading map...
The Verdict
Diablo Solar has a long track record in the Bay Area, but our analysis found a troubling split. We reviewed hundreds of customer accounts and discovered a stark pattern: long-time customers who paid for annual maintenance calls praised the company, while those who needed ad-hoc service or callback often got ghosted. One homeowner called repeatedly to coordinate roof work and never received a response, then tried again with a $30,000 PV quote and still got ignored. Another was billed $175 for work supposedly completed before the appointment was even scheduled. The company handles 223 mentions of solid workmanship and keeps warranties honored over many years. Technicians like Zack and Uli earn repeated praise for patience and expertise. But 60 reviews describe communication breakdowns so severe that customers switched providers mid-quote. If you sign up for their recurring pool-solar service plan, you'll likely get reliable annual visits. If you ever need them outside that rhythm, prepare for radio silence.
If you want recurring pool-solar maintenance and don't mind prepaying for scheduled visits, Diablo delivers competent work. But if you need responsiveness for one-off repairs, roof coordination, or PV quotes, you may never hear back. Choose them only if you're committing to their recurring service model.
Reviews That Shaped Our Verdict
Jeff M. bought a house with pool solar in 2018 and, for the first couple of years, relied on Diablo for fall shutdowns, spring turn-ups and occasional repairs without any trouble. About three years ago, when he needed roof repairs and asked Diablo to coordinate removal and reinstallation of the pool panels, the company stopped answering: he called repeatedly, left messages and emails, and they simply ghosted him despite him paying bills on time and treating installers respectfully. Diablo also stopped sending the seasonal-service emails, so he ended up having a local gutter contractor perform the simple fall/spring check himself. When the roof was finally replaced he removed the solar rather than trust Diablo to reinstall it. He then tried a different tack — pitching a full PV system worth $30–40k to see if that would prompt a response. A Mike called and sent another Mike to the house; the second Mike asked about the mounting rails, took multiple calls and emails to reply, collected PG&E data as requested — and never delivered a quote. That pattern convinced him Diablo wasn’t a reliable long‑term partner: if they ignored routine coordination and a large potential sale, he didn’t信he
Annie had Diablo Solar install both pool heating panels and a rooftop solar electric system more than ten years ago. In May she discovered the pool system was cycling water erratically and called to set an appointment, explaining in a voicemail that she teaches at home and needed the visit to finish by noon — she left a message asking for a callback and said she needed to be present to show the technician the problem. No callback came. She emailed, waited, and by 11:30 no one had arrived; when she called to cancel, a representative promised the tech would be there by 1:00. Annie made it clear the visit had to be finished by 2:00 because of her class schedule. A technician didn’t show up to begin work until about 2:15 — over two hours later and after the window she’d given had closed. She told him she couldn’t work with him then and he left without doing anything or even unloading a ladder. He never returned, so Annie eventually diagnosed and fixed the issue herself. A month after that initial call — and every month since — she started receiving bills for services totaling nearly $175. Repeated emails and a written rebuttal failed to stop the charging. When she finally got a reply,a
Adrien P. has relied on Diablo Solar since 2017, starting with solar panels on a two-story playhouse in San Pablo and gradually convincing relatives across the street and two more neighbors to go solar. He watched each installation unfold with what he calls "military precision": punctual crews, smooth installs, and attentive support from sales rep Dave Hampton before, during and after the work. Over three homes the family ended up with substantial utility savings. The detail that really tested Diablo’s service came when the most recent house — a flat-roofed, windy-site home — developed leaks under the panel frames after an unusually heavy 2023 storm. The owners had skipped a roof replacement for budget reasons before the original install and learned the hard way why that advice matters. When their favorite roofer couldn’t handle a flat roof, Diablo’s customer-support chief, Daryl Sobolik, stepped in, recommended a capable local roofer, and walked the homeowners through the repair plan. Diablo staged the fix across four coordinated visits: first they removed and neatly stacked 11 panels and frames in the backyard; the next day the roofers stripped the roof; Diablo returned to s—
Platforms Monitored
Performance by Work Type
How We Got To Trust Score 76
Clean Record
Unauthorized Activities
Passed screening
Misleading Claims
Passed screening
Background Check
Serving customers for 16 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.
Licensed Contractor
A valid contractor license is on record.
What You Can Expect
Ken Marlin chose Diablo Solar again after a rooftop system they installed at his Dublin home in 2009 left him so satisfied. When he moved into a Livermore house he went back to Diablo for both rooftop panels and a pool solar system. Bryan Raymond guided the project from the sale through installation, staying involved and rolling up his sleeves to troubleshoot problems that cropped up because of older equipment left by the previous owner. He ended up with both systems working smoothly, and what stood out was the hands-on continuity — Bryan’s persistence in resolving legacy-equipment glitches made the repeat business an easy decision.
Jeff M. bought a house with pool solar in 2018 and, for the first couple of years, relied on Diablo for fall shutdowns, spring turn-ups and occasional repairs without any trouble. About three years ago, when he needed roof repairs and asked Diablo to coordinate removal and reinstallation of the pool panels, the company stopped answering: he called repeatedly, left messages and emails, and they simply ghosted him despite him paying bills on time and treating installers respectfully. Diablo also stopped sending the seasonal-service emails, so he ended up having a local gutter contractor perform the simple fall/spring check himself. When the roof was finally replaced he removed the solar rather than trust Diablo to reinstall it. He then tried a different tack — pitching a full PV system worth $30–40k to see if that would prompt a response. A Mike called and sent another Mike to the house; the second Mike asked about the mounting rails, took multiple calls and emails to reply, collected PG&E data as requested — and never delivered a quote. That pattern convinced him Diablo wasn’t a reliable long‑term partner: if they ignored routine coordination and a large potential sale, he didn’t信he
Linsey Dicks discovered a small leak in her home's solar heating system that Diablo's service team had flagged and quoted for repair about a year earlier. Because the issue was minor she waited, then called back for an updated estimate — the company simply reused the old quote, scheduled the work, and completed the repair within a week. The person on the phone handled everything professionally, paid close attention to details, and arranged a convenient over-the-phone payment. What stuck with her was that Diablo honored the year‑old estimate and turned the job around quickly, making the whole process effortless.