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This company's track record should make you think twice. We found a troubling split: older reviews celebrate fast installs and friendly service, while recent customers report vanishing acts when systems break. One homeowner called daily for weeks during the rainy season just to fix a roof leak from the original install, another waited five months for a replacement inverter while racking up $600 in extra utility bills that were never refunded. The pattern is stark: 11 reviewers describe Calin becoming completely unresponsive after payment, ignoring calls and texts while systems sit dark. In one case, a customer filed a small claims suit just to get promised reimbursement. Even success stories show cracks: 41 reviewers praised the actual installation work, but 11 mentioned post-sale support problems serious enough to involve warranties the company wouldn't honor. If you're weighing a bid from Alpha Solar, know that the risk isn't the install itself. It's what happens six months later when you need them and they've stopped picking up the phone.
If you can't afford to hire a second company to fix problems the original installer won't return calls about, skip this one. The workmanship scores look solid, but nearly one in ten customers ended up stranded with broken systems and no response.
Robin S. had a residential solar array installed by Alpha Electric about four years ago and walked away from the initial job impressed — the install went smoothly and Calin was especially helpful. A year ago she ran into two problems during the rainy season: a roof leak through one of the mounting points and a panel that began producing only about two‑thirds of the output of the rest, a drop she first noticed in September 2019. Because other installers wouldn’t touch another company’s work, she kept calling every day until she finally reached Calin; he sent a tech who fixed the leak and inspected the underperforming panel in December 2019, cleaned the connections and told her to report back if problems persisted. After that, she tried calling, texting and emailing repeatedly and received no response whatsoever. A different installer later pulled her Enphase production data and concluded the panel itself was failing, but would charge $500–$800 just to diagnose it. Calin had assured her the entire installation — not just panels and microinverters — was covered by warranty, so being unable to get any reply has effectively left her without the installer support she was promised. The up
Rene H. had a rooftop solar system installed by Alpha Solar in 2017 and enjoyed solid performance at first — enough to prompt a positive review. Fifteen months after installation an inverter failed; technicians promised a quick fix, but getting the system back took three weeks. About sixteen months later another inverter died and repairs stretched to more than a month. By 2023 the array was down again, and Augustin Calin Mogojan made several promises to resolve the problem but failed to follow through. After six weeks of waiting for him to show up and restore service, they hired a different solar company to repair and monitor the system. The key takeaway: if you see the name Augustin Calin Mogojan (DOB 3/3/1969) or his association with Alpha Solar in your contract, proceed with caution — the follow-up service and responsiveness that mattered to this homeowner did not materialize.
Court G. discovered the inverter on his year‑old solar system failed, and what should have been a straightforward repair turned into a months‑long ordeal. They waited nearly five months for anyone from the company to show up while calls went unanswered and staff offered repeated excuses. When technicians finally arrived, they installed the wrong inverter, and it took another two months before the correct unit was fitted. Court is out about $600 that the company promised to reimburse months ago but never paid; frustrated, they filed a small‑claims case that has been delayed by COVID‑19 lockdowns. They kept emails and texts documenting the company’s promises and expect those records will help when the court moves forward. Court concluded the company isn’t what it used to be and warns prospective buyers to be prepared to chase repairs and refunds — and to save every message if they want any leverage later.
Passed screening
Passed screening
Among the longest-standing installers in the market.
Not BBB rated.
Reviews were posted naturally over time.
In Fullerton, CA, Roy and Phyllis had Tom put their solar system on the roof back in 2017, and they trusted him enough to call him again when they decided to add three Enphase batteries. He returned, gave the most competitive quote, and the battery installation went smoothly — no surprises or delays. They walked away impressed enough to call him a “Rock Star” and still recommend reaching him at 951-522-0822 for any solar or battery needs.
Jeff H. hired the company to put panels on his roof; Tom began by walking the roof layout and poring over his past electric bills to craft a proposal that fit both the roof and his energy use. He appreciated that Tom then walked him through the proposal step by step and explained the entire process. Once permits were approved, the crew completed the installation quickly and professionally. What stuck with him was the thorough pre-proposal homework combined with a fast, clean install once permits were in hand.
Rene H. had a rooftop solar system installed by Alpha Solar in 2017 and enjoyed solid performance at first — enough to prompt a positive review. Fifteen months after installation an inverter failed; technicians promised a quick fix, but getting the system back took three weeks. About sixteen months later another inverter died and repairs stretched to more than a month. By 2023 the array was down again, and Augustin Calin Mogojan made several promises to resolve the problem but failed to follow through. After six weeks of waiting for him to show up and restore service, they hired a different solar company to repair and monitor the system. The key takeaway: if you see the name Augustin Calin Mogojan (DOB 3/3/1969) or his association with Alpha Solar in your contract, proceed with caution — the follow-up service and responsiveness that mattered to this homeowner did not materialize.
Larry M. hired Tom in 2017 to put a 9 kW rooftop solar system on his house. Tom and his crew delivered a clean, professional installation, and ever since he’s been seeing an annual electric bill of about $10. Shortly after, his next-door neighbor followed suit and had Tom’s team install panels as well. He now worries the governor might change net metering — but the one detail that sticks with him is that tiny yearly bill since the install.
Teresa G. needed solar for her home, and what she remembers most is that the panels were installed in a single day. She found Tom quick to respond, delivering a competitive quote that fit her budget and offering practical ideas for the setup. He stayed available to answer questions at every step, the project moved faster than expected, and the installers did a tidy, professional job. The thing that stuck with her was the mix of clear communication, budget-minded pricing, and a one-day installation.
Anthony D. had already collected a couple of bids for a rooftop solar setup before Tom came out. He was particular about exactly where he wanted the panels and why, and although the roof required some modifications to make that placement work, Tom walked him through each step of the plan and the changes needed. He ended up comfortable with the quoted price and valued the follow‑up communication Tom provided. The detail that stood out was Tom’s willingness to adapt the installation to the homeowner’s placement preferences and keep him informed through the modifications.
As one of the owners of Sasha International, Armin has worked with Alpha Solar Electric for almost three years. He found the team consistently provided very good service to their customers and appreciated the ongoing partnership. He offers a special thank-you to his friend Calvin for the trust and faith that helped sustain their collaboration — a personal touch that defined the relationship for him.
Mike recommended Tom to a friend, and Tom installed three separate systems for that friend, who is now saving money on their power bills. He also knows several other neighbors he didn’t refer who ended up just as pleased after working with Tom. Tom handles projects of all sizes — from small residential systems to massive warehouse arrays with thousands of panels — and has earned a strong reputation for reliable service. The neighborhood’s simple rallying cry: Call Tom The Solar Guy!
Robin S. had a residential solar array installed by Alpha Electric about four years ago and walked away from the initial job impressed — the install went smoothly and Calin was especially helpful. A year ago she ran into two problems during the rainy season: a roof leak through one of the mounting points and a panel that began producing only about two‑thirds of the output of the rest, a drop she first noticed in September 2019. Because other installers wouldn’t touch another company’s work, she kept calling every day until she finally reached Calin; he sent a tech who fixed the leak and inspected the underperforming panel in December 2019, cleaned the connections and told her to report back if problems persisted. After that, she tried calling, texting and emailing repeatedly and received no response whatsoever. A different installer later pulled her Enphase production data and concluded the panel itself was failing, but would charge $500–$800 just to diagnose it. Calin had assured her the entire installation — not just panels and microinverters — was covered by warranty, so being unable to get any reply has effectively left her without the installer support she was promised. The up
Long-term satisfaction for Alpha Solar Electric drops to 2.6 ★ 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.