A1 Sun Inc.
About A1 Sun Inc.
A1 Sun Inc. is a family-owned residential solar and energy storage design and installation company based in Berkeley, California. Founded in 2007, the company has spent nearly two decades helping Bay Area homeowners integrate solar panels and battery systems into their homes to meet both current and future energy needs. A1 Sun provides a comprehensive service model across three phases: system design, installation, and utility interconnection. The design phase includes a site visit to assess equipment placement and plan electrical integration with the home's existing wiring. All installation crews are in-house A1 Sun employees, and the company emphasizes quality over speed, avoiding high production quotas that can lead to shortcuts. After installation and permit sign-off, A1 Sun handles the Net Energy Metering agreement application with the local utility on the homeowner's behalf. Battery storage systems are configured for blackout readiness, with automatic switching to off-grid mode within microseconds of an outage. Real-time and historical solar production data is accessible from any device through data monitoring capabilities. A1 Sun serves Berkeley and the surrounding areas of Alameda, Contra Costa, and Marin counties, with completed projects in Berkeley, Novato, El Cerrito, and Oakland.
Services Offered
Residential Solar
Explicitly stated: 'residential solar and energy storage design and installation company', serves 'Bay Area homeowners'
Battery Storage
Explicitly stated: 'solar and battery systems', 'energy storage system', blackout readiness and off-grid mode features
Off-Grid Systems
Mentions 'shift to off-grid mode' during outages, but this is backup/blackout readiness, not standalone off-grid systems
Solar Monitoring
Explicitly described: real-time and historical solar production data monitoring from any device, plus whole-home consumption monitoring option
Features & Specialties
Pricing
Residential solar + battery storage systems; Bay Area market with custom design and in-house crews typically $20K–$50K+
Service Areas
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