Whole-Home Backup
Solar + Battery System

This Bay Area homeowner wanted more than a lower electric bill — they wanted the lights, refrigerator, and home office to keep running no matter what PG&E was doing. We designed a 6.7kW rooftop array sized to their year-round usage and paired it with 15kWh of battery storage, enough to carry essential and high-priority circuits through a multi-day outage.

Because this was a whole-home backup design rather than a partial critical-loads setup, our team spent extra time modeling the home's actual draw — HVAC, kitchen appliances, and daily usage patterns — to make sure the battery bank was sized correctly instead of oversold or undersized.

The result: a system that pays down the electric bill every month and automatically switches to stored solar the moment the grid drops, with no manual intervention from the homeowner.

Equipment used

• 6.7kW rooftop solar array with high-efficiency panels
• 15kWh battery storage bank sized for whole-home backup
• Automatic transfer to battery power during PG&E outages
• Full permitting and PG&E interconnection handled in-house