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.

We believe in solid
We believe in solid
enduring quality
enduring quality
Harmony with the Earth
Solar is in harmony with the Earth,
Harmony with the Air
Harmony with the Water
and Water.
Upgrade your home and add value
Upgrade your home and add value.
Solar (wait...)
It's Beautiful.
It's beautiful.

What Customers Are Saying

The A1 Sun Customer Experience

News and Notes

New Tariffs on Solar Modules

Lock in value now. Choose your custom A1 Sun Solar System before module prices increase.

New Web site

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.

Upcoming Events

Sunday Streets
Sunday, October 12th, 11am - 5pm

A1 Sun is at Sunday Streets at Vine and Shattuck Today, 10/12.