We incorporated A1 Sun, Inc. in 2007 with the goal of installing superb, affordable photovoltaic and thermal solar energy systems to benefit our neighbors, our community, and the larger global environment. We are located in Berkeley and work locally. We also serve the surrounding cities of Oakland, Emeryville, Albany, El Cerrito, Richmond and Orinda and beyond. Founding members Larry Giustino and Paul Cooper both have more than 30 years of experience in the solar field. "Old-timers" in Alameda County may remember them from the solar installation company Solar Station, Inc. and the nonprofit sister organization AEC - Alternative Energy Collective in the late 70's and 80's.

A1 Sun, Inc. itself has an extremely light carbon footprint. We are located in a super-insulated, energy-efficient building and use natural daylighting with high efficiency lighting as a back-up. 100+ percent of our electric power is provided by the sun. We minimize our waste production. We reuse and/or recycle all possible materials (paper, plastic, glass, aluminum, steel, etc.) Construction debris that can't be recycled partially fills a small weekly trash can. Our third company vehicle is a solar charged electric ZENN that we use to get local business done without burning up precious hydrocarbon fuel resources. Our efforts were recognized by Alameda County and we are proud to be certified an Alameda County Green Certified Business.

Our California Contractors License number is #891743.
Our Berkeley Business License number is #0900043945.

We feed our surplus solar electricity back into the grid and share clean green energy production with our neighbors and the Bay Area community.