Score
Solar Vast reviews
• updated MAR 3, 2026Loading map...
The Verdict
Solar Vast earns high marks for installation speed and initial service, but a pattern of abandoned customers raises serious concerns. We found multiple reports of systems failing within two to three years, then silence from the company when homeowners called for help. One reviewer paid $45,000 and later received a $5,488 utility bill after their system underperformed, called repeatedly for maintenance, and eventually got hung up on. Another watched their monthly output drop from 700 kWh to 50 kWh over two years, emailed for weeks, and was told to wait indefinitely for parts. The 52 positive mentions of workmanship and 90 compliments on sales conduct tell us installation day goes smoothly. But 11 negative signals for post-sale support and stories of roof leaks, exposed wiring, and unanswered service requests tell us what happens when something breaks. If you need repairs in year three, you may find yourself calling a lawyer instead of a technician.
If you're drawn to their competitive pricing on SunPower panels, get every warranty term in writing and confirm who services the system if Solar Vast stops responding. The installation may be fast, but the follow-through is a gamble.
3 Stories That Stood Out
Gloria H. paid about $45,000 for a home solar installation three years ago and expected lower bills and routine follow-up. After Edison sent a surprise $5,488 over‑usage charge, she had SunPower inspect the array; they found the system largely intact but possibly underperforming and told her to get the installer, Solar Vast, to perform maintenance. She reached out to Solar Vast, emailed her bill, and then heard nothing — several unanswered calls, and when someone finally picked up they hung up on her. During sales the crew had been courteous, but after payment they became distant and unresponsive. The salesperson had promised a $25 monthly payment; instead she ended up paying $65–85 a month and now faced the massive Edison bill that’s hurting her finances. No maintenance crew ever came in the three years since installation. Soon after the install, her handyman found an exposed electrical wire dangling under the sink next to the new panel — unwrapped and able to deliver a dangerous shock — which he had to secure himself. Friends who got free systems enjoy running AC; Gloria and her family have been tightly conserving energy yet still landed this hefty bill. The lasting image: after$
Rachel L. had an 18-panel Solarvast system installed on her home in 2016 and expected roughly 700–800 kWh per month. For the first two years output fell from that promise to about 300–400 kWh monthly, and then things got worse. She began calling the company; someone answered once and promised to check but never followed up. This January she was hit with a $1,000 Edison bill on top of the usual $50–70 monthly charges. When she reviewed recent utility statements she discovered the array had been producing only about 30–50 kWh per month for several months. Calls went unanswered, so she emailed her original contacts, Leo and Janice. Janice eventually wrote back, first promising a technician inspection, then saying the project team had reached out to SunPower and was awaiting a response. After more prodding Janice said required materials would take roughly a month to arrive, and only after that could a technician schedule a site visit. Nearly a month after that exchange nothing had changed; the company later invoked the stay‑at‑home orders as an additional reason for the delay. Solarvast still advertises a 20‑year production guarantee and big annual savings, but Rachel ended up with a 1
Paul S. wanted a durable SunPower system and discovered Solar Vast listed as a SunPower Master Dealer; he worked with salesperson Vincent, who patiently answered all of his many questions. After comparing a good offer from a national discount warehouse with Solar Vast’s proposal, he chose Solar Vast because their solution not only matched the price but also felt technically superior — they specified micro-inverters on every panel instead of a single central inverter. Solar Vast handled the utility permissions and approvals on his behalf; those approvals took some time, but he expected that and found the company communicative throughout. The installers arrived professional and courteous, kept him informed about the schedule, and finished the job cleanly. At the end he received a packet with installation photos and component spec sheets, and he couldn’t find a single complaint about the process or the finished system.
Platforms Monitored
Performance by Work Type
How We Got To Trust Score 79
No Red Flags
Unauthorized Activities
Passed screening
Misleading Claims
Passed screening
Background Check
Serving customers for 12 years
Operating longer than most 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
Stephen C. chose Solar Vast because they could supply authentic SunPower Maxeon panels and take on a roof replacement as part of the install — the kind of full-service package he wanted. He liked that Solar Vast is a SunPower master dealer and that Ken Lau, the sales rep, was responsive and walked him through the process early on. The project moved in stages: about 4–5 months after signing the contract the crew redid the roof and installed the panels, but a few hiccups cropped up during that phase and Cindy stepped in to help sort them out. Grid connection delays with SCE pushed activation out another 6–8 months, so the system didn’t finally go live until last October — roughly one year after he signed. Since then the Maxeon array has been performing well, and what stuck with him was getting top-tier SunPower panels plus a roof redo, even if it took a year to get everything online.
Two years ago, Binh chose SunPower to put a rooftop solar system on their home while managing the extra electricity needs of two EVs. They worked with Willie, who guided the purchase and installation and then kept the relationship alive—checking in every year and providing a system report to confirm the panels were performing. The ongoing attention delivered measurable results: with both EVs to charge, the household now runs at net zero most months and often sees a small credit on the bill. They plan to have Willie handle the next installation for their new house; what stood out was not just the equipment but the yearly performance reports and a single, reliable point of contact that kept the system on track.
James chose a rooftop solar system installed in 2011 and has watched it perform reliably for more than a decade. From the installation day through routine maintenance and ongoing follow-up, the team stayed engaged and helpful, making the whole process feel straightforward and well-supported. He felt secure in the decision largely because of the company's 25-year warranty—something he views as unmatched—and because service remained available long after the panels went up. More than the initial install, what stuck with him was the combination of steady performance and that long-term warranty and responsiveness.
F hired SolarVast to install SunPower X-22 panels on their Southern California home in 2018, and the project was a straightforward rooftop job that finished quickly. SolarVast handled all the city permits and paperwork, so the homeowner didn’t have to chase approvals, and the installation has performed without problems since. Impressed enough to trust the team, F has steered many friends and family to Ken Lau at SolarVast for their own installs. The lasting detail that mattered most: years after the 2018 install the panels and system still work trouble-free, and referrals continue to go straight to Ken Lau for a hassle-free, permit-managed SunPower setup in Southern California.
Jessica K. chose this company for a residential solar installation two years ago, and since then she hasn’t experienced any problems. The system has run smoothly, and she appreciated the company’s strong service. The standout detail: two years of trouble-free performance backed by dependable customer support.
Candace had solar panels put on her house and discovered about $100 less on her monthly electricity bill. Willie guided the installation with kindness and professionalism, and then kept checking in long after the job was done — even a year later he verified the system was working and that the savings showed up on the bill. When questions came up, he answered quickly and stepped in to help. The detail that lingered most: his ongoing follow-through to make sure the panels actually delivered the promised savings.
Stanley K. had solar panels put on his house just over a year ago and immediately noticed his monthly electric bills drop. He found the SolarVast crew professional, friendly, and clearly well versed in solar. Choosing to go green with SolarVast left him very satisfied — the instant savings combined with a competent, personable team made the move feel right. A year later, that immediate reduction in his bills remains the most memorable part of the experience.
Martha P. chose this company to install solar on her home and worked closely with Ken Lau, whose steady, helpful guidance carried the project through. She ended up with panels that have met her expectations and considers the system a solid investment so far. What stood out most was Ken’s hands-on support from start to finish — she recommends the company without reservation.
Chaoyong installed an expensive residential solar system on his house and, by the second year, discovered serious failures. The system’s host went out of order in year two and has remained nonfunctional for about a year, despite the large amount he paid. He also found that the solar roof the company put on began leaking. Frustrated by the lingering equipment failure and roof damage, he has started lining up a lawyer to take legal action against the installer.
Long-term Satisfaction
Long-term satisfaction for Solar Vast drops to 3.7 ★ compared to early reviews. This decline is worse than 75% 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.