A1 Sun Inc.

A1 Sun is a family-owned residential solar and energy storage design and installation company based in Berkeley, California. Since 2007, the company has been helping Bay Area homeowners integrate solar and battery systems tailored to their current and future energy needs. A1 Sun focuses on advanced system design, blackout readiness with rapid off-grid switching, and durable installations that stand the test of time. The company customizes energy storage systems to maximize savings and offers real-time data monitoring for solar production. Their in-house installation teams coordinate closely with homeowners and contractors to ensure quality and safety. Serving Alameda, Contra Costa, Marin counties, and beyond, A1 Sun is committed to quality workmanship, customer service, and long-lasting solar solutions.