A1 Sun Reviews

Reviewers mostly describe A1 SUN's sales process as clear, thoughtful, and low-pressure. The strongest recurring theme is that proposals and system recommendations were explained well and aligned to customer needs, with no complaint pattern showing up in the sampled reviews.Solar.com's composite of published customer feedback, not a customer quote

Clear, consultative proposals. Reviewers say the company took time to explain system design and offer thoughtful recommendations, rather than pushing a one-size-fits-all package. Representative review excerpt: "As a local, small business, A1 Sun provided a personalized touch, conducting a site visit, offering clear explanations, and giving thoughtful advice on designing the best system for my needs."

Helpful pricing guidance. Some reviewers report that the team advocated for better pricing and walked them through the timeline and permitting expectations up front. Representative review excerpt: "They advocated for the best pricing, gave me a clear timeline and did all the appropriate permiting and follow-up."

Professional sales experience. Customers describe the contracting experience as professional and easy to work through, including cases involving solar plus battery systems. Representative review excerpt: "We contracted with A1Sun for our solar install with battery and couldn’t be more pleased with their service and professionalism."

Reviews are generally positive on pricing clarity, with many customers describing bids as reasonable or well explained. A small number of complaints appear in this category, so the overall read is positive but not entirely spotless.Solar.com's composite of published customer feedback, not a customer quote

Reasonable bids and estimates. Several reviewers describe the pricing as fair or reasonable after on-site review of their roof and system needs. Representative review excerpt: "Larry Giustino came to my house, inspected the roof and the panels (he was fascinated by the "antique" array) and gave me an absolutely reasonable bid for removing and re-installing..."

Value tied to service. Some customers say they paid a bit more, but felt the service and support justified the difference. Representative review excerpt: "Even though it cost a little more than a national, bigger company, we are very happy we went with a local business because their customer service is worth paying more..."

A few cost concerns. A small number of reviewers raise concerns about cost or service-related billing expectations, which keeps this category from being uniformly positive. Representative review excerpt: "In my case where the system electrical defects are known, to replace out an IQ Controller 3, the time to do this will be "a half day", and the total..."

Reviewers strongly praise A1 SUN's communication and project coordination. Many say they received regular updates, clear handoffs, and responsive support throughout the job, while a few reviews mention difficulty reaching the company or getting a prompt response.Solar.com's composite of published customer feedback, not a customer quote

Regular status updates. Customers say the team kept them informed by email or text so they were not left wondering what would happen next. Representative review excerpt: "The email or text about everything on a regular basis so you're never wondering what's going to happen or when."

Responsive project support. Reviewers describe the staff as collaborative and committed, with multiple touchpoints before and during installation helping the project move smoothly. Representative review excerpt: "The Giustino family's lifelong passion for solar, including an enthusiasm for education as well as installation, has clearly infused the ongoing enterprise with a cohesive sense of collaboration and commitment."

Occasional contact delays. A small number of reviewers report trouble getting through by phone or waiting longer than expected for a response, even when the underlying work was handled well later. Representative review excerpt: "Left multiple phone messages trying to arrange solar panel and backup battery installation."

Timeline performance is a clear strength in the review sample. Customers commonly say A1 SUN set expectations early, handled permits and inspections, and kept the project moving in a way that felt predictable and turnkey.Solar.com's composite of published customer feedback, not a customer quote

Clear schedule expectations. Reviewers say the company gave them a clear timeline up front, including when they knew the wait would be several months. Representative review excerpt: "They advocated for the best pricing, gave me a clear timeline and did all the appropriate permiting and follow-up."

Permits and inspections handled well. Customers report that A1 SUN took care of permitting, inspections, and city coordination as part of a smooth process. Representative review excerpt: "They handled all permits, inspections, and coordination with the city, making the whole process completely turnkey and hassle-free."

Delays disclosed in advance. When installs took longer, reviewers say those delays were explained at the start rather than left as a surprise. Representative review excerpt: "We had to wait several months for the installation, but they had clearly informed us about the waiting time when we signed the contract."

This is one of A1 SUN's strongest areas in the reviews. Customers consistently describe professional crews, careful site handling, and solid installation quality, with no meaningful complaint pattern in the sample.Solar.com's composite of published customer feedback, not a customer quote

Professional crews. Reviewers say the foreman and installation crew were reassuring and professional during the job. Representative review excerpt: "A1 Sun's staff were very responsive and the foreman and installation crew put us completely at ease."

Careful on-site work. Customers mention crew members being attentive on site, including taking steps to avoid disrupting the household. Representative review excerpt: "The people who came to work on my house were uniformly wonderful, up to and including knocking on my door to suggest that I bring my "little ones" (cats) inside..."

Strong installation quality. Reviewers describe the finished system as excellent or great, including installs involving panels and batteries. Representative review excerpt: "I had an excellent experience with A1 Sun installing a full solar system for my home, including panels and a battery using Enphase equipment."

Post-install support and system performance are rated positively overall, with many reviewers saying the system works well and service after activation has been helpful. That said, a few complaints about service follow-up or software/performance issues appear in the sample, so this area is positive but not perfect.Solar.com's composite of published customer feedback, not a customer quote

Helpful service after install. Some reviewers say the company stepped in to help when they had a solar issue and that the service was outstanding. Representative review excerpt: "I had a problem with my solar and their service was outstanding."

System performance described positively. Customers report that their systems are producing well and, in some cases, working better than expected. Representative review excerpt: "Their designer was able to work around some challenging roof geometry to give us the system size we wanted, and it is producing like gangbusters."

A few post-install complaints. A small number of reviewers raise concerns about repair support or software-related performance issues after turn-on. Representative review excerpt: "The software is so bad that its costing customers lots of money by routing power to PGE when it's cheap and getting power from PGE when it's very expensive, the..."

Products

Solar

Service area

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