Rolling blackouts, Public Safety Power Shutoffs (PSPS), extreme heat events, and winter storm outages are now a permanent fixture of California living. In Marin County, Sonoma County, and across the Bay Area, multi-day power outages have gone from rare emergencies to predictable seasonal events.
Many homeowners assume that having solar panels on their roof means the lights will stay on during a blackout. They are shocked to learn the truth: standard grid-tied solar systems automatically shut down when the grid fails. This isn’t a design flaw — it’s a safety requirement. Without this automatic disconnection (called “anti-islanding”), your solar panels could energize downed power lines and put utility workers at risk.
The generator trap
The traditional answer to backup power has been a gas or propane generator. But generators are loud, polluting, require fuel deliveries during the very emergencies when supply chains are disrupted, and demand regular maintenance. During extended PSPS events, homeowners with generators often find themselves rationing fuel, running the generator only a few hours per day, and still losing refrigerated food when the tank runs dry.
There is a better way.
Islanding-capable solar and storage
An islanding-capable battery system — the kind we design at Symmetric Energy — does something fundamentally different. When the grid fails, the system instantly and automatically disconnects your home from the utility grid and creates a self-contained power island. Your solar panels continue generating power. Your battery stores the excess. Your home runs normally.
How it works in practice
The transition from grid-connected to island mode happens in milliseconds — fast enough that you won’t notice it. No flickering, no rebooting of electronics, no manual switching. When the grid comes back online, the system reconnects automatically. During the outage, your solar panels charge the battery during the day, and the battery powers your home at night. For a properly sized system, this cycle can sustain a home indefinitely.
Smart load management
We integrate smart load panels that allow the battery system to prioritize your most critical circuits during extended outages. Refrigeration, medical equipment, home offices, security systems, and internet connectivity stay powered first. Non-essential loads like pool pumps, landscape lighting, and clothes dryers can be automatically shed to extend battery runtime when solar production is limited (cloudy days or during short winter daylight hours).
Beyond backup: true independence
The same system that provides outage protection also delivers daily financial value. During normal grid-connected operation, the battery optimizes your energy costs by storing cheap solar power and discharging it during expensive peak hours. The resilience is a bonus on top of a system that’s already saving you money every day.
Energy independence isn’t about living off the grid. It’s about having the grid be optional — a convenience rather than a dependency. That’s the system we design.