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Backup Power · SOLRITE Blog

Do solar panels work during a power outage?

If you've ever watched your solar shut off during a blackout, you're not imagining it. Here's why it happens, and the one thing that keeps your lights on.

The surprising answer: usually, no

It's one of the most common shocks for new solar owners. The grid goes down, the sun is shining on a roof full of panels, and the house is still dark. If you have a standard grid-tied solar system with no battery, your panels shut off during an outage, on purpose. It feels backwards, but there's a good reason for it.

Why grid-tied solar shuts off

The culprit is a safety rule called anti-islanding. When the utility cuts power, line workers may be out repairing the very wires your home connects to. If your solar kept pushing electricity onto those lines, it could injure them. So every grid-tied inverter is required to detect a grid outage and immediately stop producing. No exceptions, no override, even at high noon.

The result: a solar-only home is just as dark as its neighbors during a blackout. The panels are fine. They're simply not allowed to run in isolation.

The fix: a battery

A battery paired with a hybrid inverterchanges the picture entirely. When the grid drops, the system safely disconnects from the utility and creates its own self-contained "island" inside your home. Now your battery can power your house, and your solar is allowed to keep running, because it's no longer feeding the grid. It's feeding you.

That combination is the whole point of the SOLRITE Solar + Battery VPA. The battery carries your home when the grid fails, and during daylight your solar recharges it. A sunny outage that lasts days can keep essential loads running almost indefinitely.

What backup actually looks like

When the grid goes down, a sonnen or Duracell Max Hybridsystem switches your home to backup in a few seconds, automatically. Lights, refrigerator, internet, and outlets stay on. No priming a generator, no flipping a transfer switch. Most people don't even notice the outage until their phone buzzes with the utility alert.

Texas, California, and a grid you can't count on

This matters more in some places than others. Texasruns on an isolated grid (ERCOT) that can't easily import power from neighboring states, which is part of why Winter Storm Uri turned into a multi-day catastrophe. In California, utilities now trigger Public Safety Power Shutoffs during fire season, planned outages that can last hours or days. In both, "does my solar work in an outage" isn't hypothetical. It's a question homeowners end up answering the hard way.

The takeaway is simple: solar lowers your bill, but a battery is what keeps your home running when the grid can't. If you're weighing your options, see how a battery stacks up against a backup generator, and how much battery capacity you'd actually need.

Solar + outage FAQs

Keep your lights on when the grid goes down.

See what a $0-upfront solar + battery system would look like for your home, backup included.

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