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A1 Sun Inc.
About the business:
In Berkeley, we are A1 Sun Inc., a solar energy company devoted to harnessing the power of the sun for your home. We specialize in installing solar energy systems that not only reduce your carbon footprint but also lower your energy bills.
Our expertise extends beyond just solar panels. We provide comprehensive assessments, ensuring your property is well-suited for solar energy. We design and install custom solar solutions tailored to your home's unique needs, maximizing efficiency while minimizing disruption.
Join the growing number of satisfied customers in Berkeley who have partnered with us for a sustainable future. At A1 Sun Inc., we are committed to delivering quality solar energy services that empower you to take control of your energy consumption. Let's work together towards a brighter, greener tomorrow.
Services:
All services 1-
Solar Energy Company
Book from $50In our Berkeley home, we empower you with clean, sustainable energy through our solar energy solutions. We tailor solar panel …
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Hours of operation
- Mon – Fri
- Sat – Sun
- 7:30 AM – 4:00 PM
- Closed
Latest reviews
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Pamela Canales9 June 2026
A1 Sun just finished the installation of my solar system--9 panels and 3 batteries. I was in a rush last year to put a new roof on my house and A1 Sun worked with my roofer to get the solar system mounts/brackets installed before the new roof went down. That was VERY important to me. Then they finished up the rest of the system as soon as they could, which was this summer. They took care of dealing with my county building and fire department for all permits (my batteries are mounted outside so it was not a typical design). The entire crew is very professional and everything went smoothly. I couldn't be happier with my system.
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Benjamin D. O.9 June 2026
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 consistent long term scheduling and coordination under various tight PGE deadlines. A1 Sun came through with flying colors. Could I have found some fly by night discounter with a lower quote? Possibly, but I would have been nuts to pass up the true value that A1 Sun delivered, and it's a good feeling to support such a dedicated local enterprise. Thanks folks, A+ to A1, and Solar Power to the People!
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Aidan K9 June 2026
Professional and high quality service. Couldn't be happier with the install and setup.
