David B.
6/2/2025
I have recently completed installation of solar panels with battery backup by A1 Sun. They have been extremely responsive and professional at all points along the journey, and I could not be more...
A1 Sun
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1455 4th St
Berkeley, CA 94710
A1 Sun is a family-owned residential solar and energy storage design and installation company based in Berkeley, CA. Since 2007, they have been helping Bay Area homeowners incorporate solar and battery systems into their homes to meet their current and future energy needs.
With a focus on quality and durability, A1 Sun offers advanced system design, blackout readiness, and decades of performance. Their expert team takes the time to understand each home's existing wiring and usage patterns, customizing energy storage systems to maximize energy bill savings while maintaining blackout readiness. A1 Sun also provides data monitoring, allowing homeowners to view real-time and historical solar production data from any device.
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Reviews
5.050 reviewsShin K.
8/15/2025
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...
Colin T.
3/9/2025
We wanted a solar electric system that was future-ready, with enough power to start making our home fossil-fuel-free, and A1 Sun delivered. They were very informative in the assessment/proposal...
Pamela C.
10/24/2024
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...
Bettina J.
1/28/2025
A1 Sun was fantastic. Everybody who interacted with us was patient and kind. They helped us coordinate the work with a roofer, which we really appreciated. The new system is working better than we...
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