A1 Sun is a true local gem, committed not only to providing excellent project management and customer service, but also to hiring, fairly compensating, and retaining a skilled and dedicated staff in Berkeley. 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. I had a VERY complex design and installation project, requiring careful and con

We had a very positive experience with A1 Sun for installation of solar with Enphase battery backup. We replaced the roof at the same time, and I initially contacted larger installers who would quote for the roof plus solar. I'm glad we also contacted A1 Sun and local roofers (choosing to work with Nicholas Roofing). A1 pricing was comparable to other quotes, and importantly was never inflated for other issues as they arise. They worked out a layout on our south-facing rooflines to maximize

Professional and high quality service. Couldn't be happier with the install and setup.

I wish I could give more than five stars. A1 Sun and crew went above and beyond to bring my solar power project over the finish line. I contracted with a terrible solar company first who went bankrupt after stealing money from clients for unfinished and ill baked projects including mine. Despite the complexity of my half baked solar project, they didn't decline my request for help. They demonstrated awesome creativity to make use of the footings installed by my previous contractor. They painstak

I just got off the phone with "Ferrar", Service Manager, about an Enphase warranty repair. A1 Sun , the Enphase Platinum contracted installer in Berkeley, will not effectuate Enphase labor/product warranty repairs per what Enphase contracts. Their estimated surcharge for an estimate to determine what repairs are needed is a minimum of $550 plus $200 per hour after two hours. In my case where the system electrical defects are known, to replace out an IQ Controller 3, the time to do this will be