Berkeley based, A1 Sun, Inc. is family-owned and family-managed business built upon decades of quality design and craftsmanship. We design, install and service both photovoltaic & solar thermal systems, we’re the real deal. We offer over 80+ years of combined design, engineering and construction, we do it right. Tired of the sales hype & pressure, want excellent design, installation and service, call A1 Sun, Inc. Berkeley based, A1 Sun, Inc. is family-owned and family-managed business built upon decades of quality design and craftsmanship. We design, install and service both photovoltaic & solar thermal systems, we’re the real deal. We offer over 80+ years of combined design, engineering and construction, we do it right. Tired of the sales hype & pressure, want excellent design, installation and service, call A1 Sun, Inc.