Diablo Solar Services Reviews

Reviewers often describe a straightforward sales and proposal process, with multiple comments praising clear diagnosis, helpful guidance, and teams that did not push oversized or unnecessary work. At the same time, a smaller set of complaints describes pushy follow-up, verbal-only quotes, and contract expectations that were not fully met.Solar.com's composite of published customer feedback, not a customer quote

Helpful, low-pressure sales. Positive reviews say the sales process felt clear and practical, including cases where the team identified what needed attention and what could wait. Some reviewers also say they were steered away from higher-priced or more aggressive proposals. Representative review excerpt: "I needed replacement of a couple of 17-year old panels and Diablo diagnosed the problem, told what I needed to do now and what could wait, quickly got me a..."

Proposal expectations not always aligned. Complaints mention pushy outreach, verbal quotes, and requested items that were not included as expected. A few reviewers also say they felt the original proposal did not match the work or follow-up they were promised. Representative review excerpt: "The sales rep was super pushy, wouldn't stop calling, and then disappeared once I signed the contract."

This is one of the weaker categories in the review set.Solar.com's composite of published customer feedback, not a customer quote

Unexpected charges and billing disputes. Complaints commonly describe extra charges, unclear quotes, or billing that reviewers say they did not expect. Several reviews also mention payment or refund concerns and disagreements over whether added work justified the final amount. Representative review excerpt: "When i questioned the extra charge I was told that the tech did more work."

Pricing pricing in some reviews. Some reviewers say the price felt fair and the company did not try to oversell the job. Those comments frame the cost as reasonable relative to the work performed. Representative review excerpt: "They did not try to oversell, communication was good, the price was competitive, and the installation was trouble-free."

Reviews are mixed-to-positive overall, with many customers describing responsive scheduling, clear explanations, and professional on-site coordination. Still, a notable complaint pattern mentions missed callbacks, slow responses, and handoff gaps before or after the work was completed.Solar.com's composite of published customer feedback, not a customer quote

Clear updates and professional handoffs. Positive reviews say appointments were confirmed clearly and technicians explained the work in plain language. Some customers also describe smooth on-site coordination and helpful responses to special requests. Representative review excerpt: "They use text messaging and email to confirm appointments, they are always on-time, or even early when they come to my home, and they always provide clear explanations of what..."

Slow callbacks and missed responses. Complaints focus on not getting calls returned, needing multiple follow-ups, and hearing back only after repeated contact. A few reviewers also say communication dropped off after the job was finished. Representative review excerpt: "Never respond to calls and voicemails."

Timeline feedback is generally positive, with many reviewers saying appointments, scheduling, and installation progress moved reliably. Complaints still appear around rescheduling, missed windows, and occasional delays tied to service or startup issues.Solar.com's composite of published customer feedback, not a customer quote

Often on time and well scheduled. Many reviewers say appointments were confirmed ahead of time and crews arrived on time or early. Some also report efficient scheduling and smooth movement through the work process. Representative review excerpt: "They use text messaging and email to confirm appointments, they are always on-time, or even early when they come to my home, and they always provide clear explanations of what..."

Delays and missed appointments. Complaints describe rescheduling, long waits, and appointments that could not be completed as planned. A few reviewers say they experienced delays before the work was done or had trouble getting the next step scheduled. Representative review excerpt: "Same issue as everyone else - abysmal customer service, long delays and no responses for scheduling."

Workmanship is a strong area in the review corpus. Most reviewers praise the installation quality, professionalism, and cleanup, while the smaller complaint set centers on incorrect parts, leaks, and a few cases of follow-up repairs or damage concerns.Solar.com's composite of published customer feedback, not a customer quote

Professional installation quality. Positive reviews frequently describe skilled crews, careful work, and clean job sites. Some customers also mention that the team handled roof-related coordination or panel removal and reinstallation smoothly. Representative review excerpt: "The technician was professional, knowledgeable, and took the time to explain what was done and how to keep the system running efficiently."

A few install or repair problems. Complaints mention leaking panels, missed caps, or incorrect equipment that prevented completion as scheduled. In those cases, reviewers say the site work needed extra follow-up to resolve the issue. Representative review excerpt: "However, during my start up last year, they failed to cap an end pipe and it resulted in the flooding of my flat roof that spilled over to my patio..."

Post-install feedback is largely favorable, with many reviewers saying systems performed well and warranty support was helpful when needed. The complaint side is smaller but includes inverter issues, post-install service frustrations, and concerns about later performance or follow-up.Solar.com's composite of published customer feedback, not a customer quote

Helpful warranty and service follow-up. Positive reviews say the company helped get systems back online and checked warranty coverage when issues came up. Some customers also mention long-running service relationships and clear explanations from technicians. Representative review excerpt: "We lost all connection / power and called Diablo Solar and they handled everything and got us back up and running….and checked our warranty and everything was covered."

Some post-install service concerns. Complaints describe inverter failures, billing or support frustration, and cases where reviewers felt follow-up after installation was slow or unsatisfying. A few also say they were still waiting to see whether performance held up over time. Representative review excerpt: "In the first year of our system, one of the inverters stopped working."

Products

Solar

Service area

California. Note: the install counts on this page cover California investor-owned-utility records only.