Residential Battery Backup in California
What California Homeowners Should Know About Solar Battery Backup
Grid-tied solar systems don’t require a battery backup for the home to operate or to reduce your electric bill. But in California — where rolling blackouts, wildfire-related outages, and PG&E Public Safety Power Shutoffs are a growing reality — a residential solar battery backup system is quickly becoming a necessity, not a luxury. If you’re looking for a quiet, nearly instantaneous home battery backup system that automatically kicks in the moment the grid fails, adding a backup battery for home use to your solar setup is the smartest upgrade you can make.
Under California’s NEM 3.0 net billing policy, standalone solar systems now earn significantly less credit for energy exported to the grid. The solution? Store that energy in a residential battery backup system and use it yourself — on your own schedule, at your own rates. A whole home battery backup protects you from both outages and rising utility costs at the same time.
How Home Battery Backup Works During Power Outages
A residential battery backup system acts as your home's personal power reserve. The moment the grid goes down, your battery backup for home automatically detects the outage and switches to stored power — typically in less than a fraction of a second, with no flicker, no reset, and no disruption to your appliances. During daylight hours, your solar panels continue recharging the battery so your backup power battery for home replenishes itself throughout the outage. Once utility power is restored, the system seamlessly reconnects to the grid.
What Appliances Can a Battery Backup for Home Power During Outages?
The right residential battery backup power system can keep your most critical appliances running when the grid goes down. Depending on your system size and energy usage, a home battery backup system can power refrigerators and freezers to protect your food, well pumps and sump pumps to maintain water access and prevent flooding, heating and cooling systems to keep your family comfortable, lighting throughout your home, medical devices and EV chargers, and garage door openers so you're never locked in or out.
How Many Batteries Does Your Home Backup Battery System Actually Need?
The number of batteries required for your residential backup battery system depends on two primary factors: the total load you want to back up and how long you need that backup to last. A single battery unit — such as a Tesla Powerwall 3 with 13.5 kWh of capacity — is often sufficient for backing up essential appliances in most average-sized homes. For larger homes, higher energy usage, or homeowners who want the best home battery backup that covers virtually all circuits, multiple units can be stacked together for extended runtime.
What Are the Best Solar Battery Backup Systems Available Today?
Today's residential solar battery backup market is dominated by advanced lithium-ion technology, which offers superior energy density, longer lifespan, and far less maintenance than older lead-acid alternatives. At Soltari, we install the leading residential battery backup systems from brands including Tesla, FranklinWH, and SolarEdge — each representing a different approach to home energy storage.
Can a Backup Battery Be Added to My Existing Solar System?
Yes — and it's one of the most popular upgrades we complete for homeowners in California. Our residential solar battery backup systems are designed to retrofit onto the vast majority of existing solar installations, whether your panels were installed last year or over a decade ago. You don't need to replace your panels, your inverter, or any major components in most cases. We handle all engineering, permitting, and installation, connecting your new backup battery for home directly to your existing system.
Are Residential Battery Backup Systems Covered Under Warranty?
Absolutely — and Soltari's warranty coverage is one of the strongest in the industry. While most battery manufacturers offer 10-year warranties, we back every residential battery backup system we install with a comprehensive 25-year warranty. That's 10 to 15 years longer than any manufacturer's standard coverage, giving you the confidence that your investment is fully protected for decades to come.
Get started with a free solar consultation
Ready to take control of your home’s power with the best home battery backup available in California? We begin with a thorough on-site assessment of your home’s energy usage and electrical setup, followed by a detailed solar battery backup consultation, during which we walk you through every option and present a custom-designed residential battery backup system proposal tailored to your home.
