Off-Grid Capable
Hybrid System

This homeowner wanted to get as close to energy independence as possible without fully disconnecting from PG&E. We designed a 21kW rooftop array — large enough to cover heavy daily usage and fully recharge three Tesla Powerwalls even on shorter winter days.

Three Powerwalls gave us enough battery capacity to run the home almost entirely on stored solar, with the grid kept as a backup rather than the primary power source. On strong-sun days the system produces up to 100kWh, comfortably covering the home's usage with capacity to spare.

Because the design is hybrid rather than a true off-grid disconnect, the homeowner still has PG&E as a fallback, but rarely needs to draw from it.

Equipment used

• 21kW rooftop solar array
• Three Tesla Powerwall battery units
• Hybrid inverter configuration for maximum self-consumption
• Full permitting and PG&E interconnection handled in-house