There has never been a better time to install solar. A1 Sun, Inc. is a solar installation company that specializes in high quality custom solar systems for environmentally conscious people. Based in Berkeley, A1 Sun is proud to serve the greater East Bay (Albany, Berkeley, Emeryville, El Cerrito, Kensington, Oakland, Richmond and beyond).

We begin by providing a free estimate. We then custom-design a photovoltaic and/or thermal (SDHW) solar system for your specific home or business location. Our work is of the highest quality, using the best solar modules available. We process city building permits, and California Solar Incentive (CSI) PG&E cash rebate forms.

Your solar system will qualify for the new 30 percent federal tax credit. We warrant our work for a full 10 years.

A1 Sun will be happy to help you reduce your carbon footprint. Become more sustainable while saving money! We don't use carbon offsets because we are Green Certified and produce our own photovoltaic electricity on-site.