Welcome to A1 Sun
After installing solar on our own home and business, our neighbors wanted their own systems installed. For the benefit of our neighbors, our community, and the larger global environment, we incorporated A1 Sun, Inc. with the goal of installing superb, affordable photovoltaic and thermal solar energy systems. A1 Sun is located in Berkeley. We serve the surrounding counties of Alameda, Contra Costa, Marin and beyond.
A1 Sun offers a custom onsite evaluation and Free Solar Estimate for your home and business.
What Customers Are SayingThe A1 Sun Customer Experience
I decided to "Go Solar" last summer and called Larry Giustino at A1 Sun, Inc. Careful, efficient, outstanding workmanship - the process was painless
Helen Green, I.E.P., Berkeley
A1 Sun was an A+ experience for me. They came over in person, laid out a comprehensive plan, and provided thorough answers to all my questions. Their bid gave me all the information I needed to make a decision. A1 took care of all the applications and paperwork, and did the installation quickly and professionally. Throughout the installation, the team was polite, friendly, and always cleaned up after themselves. These people don't take short cuts - they get it done right.
Peter Hobe & Christina Crowley, Berkeley
My experience with A1 Sun has been great! Not only was the work done on time, on budget, and exactly as promised, but Larry has gone way out of his way to help with forms, bureaucracy, and new developments. I couldn't recommend this company more enthusiastically.
Joe and Betsy Schlessinger, Berkeley
Thanks again for all your help and committed follow through after the installation. As I am sure you know, that is a rare thing in the trades.
Dave and Corrie Winnacker, Albany
I'm a very happy customer. I am thrilled at the prospect of a sunny power generating summer!
Margaretta Lovell, Berkeley
Thanks for all your work, not only on the installation, but on the mountain of paperwork!! We received our rebate for a dollar more than you predicted.
John and Lisa Doyen, El Cerrito
As a parent, I want to do whatever I can to help ensure that our planet remains viable for future generations. I decided to invest in Solar. Using A1 Sun was a terrific experience. The A1 Sun team was friendly and non-intrusive; they left no footprint other than the functioning solar panels on my roof. A very satisfied customer.
Ann Rowland, Berkeley
We had a leak in our vintage solar hot water system installed by another solar company. A1 Sun responded quickly, diagnosed and solved the problem. I'm a happy customer.
The Country Joe and Kathy McDonald Family, Berkeley
News and Notes
Lock in value now. Choose your custom A1 Sun Solar System before module prices increase.
We've redesigned our web site in order to better serve you. We're proud of the result of our A1 Sun Team effort. Our goal is to maintain a functional, informative, clear and easy to use website.