Will Solar Panels Work During a Power Outage in Florida?

Solar in a power outage: what really happens

No, a typical solar system without a battery won't power your home in an outage. Many homeowners in Leesburg and around Central Florida find this hard to believe.

With a typical grid-tied system and no battery, your panels stop producing the instant the grid goes out. That's true even at noon on a cloudless day. The panels are fine and the sun is blazing, but your house is still dark.

It feels backwards, I know. But there's a good safety reason for it, and the fix is simple. To keep power during an outage, you need a battery. This post is part of our Central Florida solar battery backup guide.

Anti-islanding: why grid-tied panels shut off

It comes down to a safety feature called anti-islanding. When the grid fails, utility crews head out to fix the lines. If your solar kept sending power onto those lines, it could shock a worker who thinks the line is dead.

To prevent that, grid-tied inverters are built to disconnect and stop producing the moment they sense the grid is down. The inverter is the box that turns solar power into power your home can use.

So the shutdown isn't a defect. It's your system doing exactly what it should. A basic grid-tied setup just has no way to power your home while staying safely cut off from the grid. That's the job of a battery and backup gateway.

Backup equipment you need for outage power

Three things turn solar into true backup power:

• A battery, such as a Tesla Powerwall, Enphase IQ Battery or Generac PWRcell, to store the energy.
• A backup gateway and automatic transfer switch. These cut your home off from the grid safely, so your system can run on its own.
• A backup-ready inverter, set up to keep your panels feeding the battery during a daytime outage.

With those in place, you may barely notice an outage. The gateway drops you off the grid in a split second. The battery carries the house, and your panels refill it while the sun is up.

Not sure which battery you have, or need it serviced? Our solar battery storage service works on every major brand, including Sol-Ark systems.

Battery runtime: how long the power stays on

How long a battery keeps your power on depends on its usable size and what you run. Powering just the essentials can often stretch one battery across a day or more. That means the fridge, lights, Wi-Fi, phone chargers and fans. Turn on central air in a Florida summer and you'll drain it much faster.

Your panels refill the battery each day. That's why solar plus storage can outlast a fuel generator in a long outage. The trick is managing your loads. We do the full runtime math in how long a solar battery lasts in an outage.

Central Florida storms make backup matter more

Outages here are a when, not an if. Central Florida gets frequent lightning, and the Atlantic hurricane season runs June 1 through November 30. Between named storms and summer thunderstorms, power cuts are part of the season from Kissimmee to Ocala.

The worst time to learn your backup doesn't work is mid-hurricane, with no installer answering the phone. We service backup systems across Leesburg and all of Central Florida. That way you can confirm your system will carry you before the storm shows up. See our hurricane-season battery prep checklist.

Backup testing: how to know it really works

Don't guess on this one. A proper test confirms three things:

• The automatic transfer switch cuts your home off from the grid when power drops.
• The battery takes over and runs your backed-up circuits.
• The system reconnects and recharges cleanly when the grid comes back.

The test also catches old gateway software, a weak battery that has quietly lost capacity, or backup circuits that weren't wired the way you thought.

Most homeowners shouldn't try to fake an outage themselves, since it means working with electrical gear. That's exactly the kind of check we run. Request a free solar battery backup assessment or call (407) 270-2542. We'll tell you straight whether your system is storm-ready.

Frequently asked questions