Home Backup Generators in Florida

Portable vs. Standby, Safety, Permits, and HOA Rules

After a hurricane, the worst part for many Central Florida households isn’t the storm. It’s the days without power that follow, in heat and humidity, often with a refrigerator full of food and, for homes on a well, no running water. A backup generator can make those days manageable, but the type, connection, and placement matter as much as the purchase.

Short version: Most households choose between a portable generator, a quieter inverter generator, and a permanently installed standby generator that starts on its own. Portables are the cheapest way to keep a refrigerator, fans, lights, and phones running. Standby units can run central air and the whole house but need a permit and professional installation. Run portable generators outdoors only, at least 20 feet from the house, never in a garage or on a porch. Never wire a generator into a panel without a transfer switch or approved interlock, because backfed power can kill utility workers. Since August 1, 2025, portable generators of 10,000 running watts or less have been permanently exempt from Florida sales tax. In HOA communities, state law treats exterior fixed generators as hurricane protection, so the association must approve installations that meet its adopted specifications.

Why backup power matters more in Central Florida

Outages after a major storm can last from hours to more than a week, depending on damage to the local grid. A few Florida-specific factors raise the stakes:

• Food: A closed refrigerator keeps food safe for about 4 hours without power. A full freezer lasts about 48 hours and a half-full one about 24.
• Heat and humidity: Indoor temperatures climb quickly in late summer, and mold can start growing in a closed, damp house within days. See Florida mold prevention.
• Wells and septic: Homes on a private well have no water pressure without power, and aerobic septic systems and grinder pumps also need electricity. See well water and septic and sewer.
• Medical devices: Oxygen concentrators, CPAP machines, and refrigerated medications may need continuous power. A utility’s medical-needs program doesn’t guarantee faster restoration after a hurricane.

The three main types of home generators

Costs vary widely. Portable generators range from several hundred dollars to a few thousand. Adding a professionally installed inlet and transfer switch adds more. A whole-home standby system, with the unit, automatic transfer switch, gas line or propane tank, pad, and permits, commonly reaches five figures. Get written quotes that list each of those items separately.

How to size a generator

Start with what actually needs to run during an outage, not the whole house. Add up the running watts of those items from their nameplates or manuals, then account for the extra starting surge that motors need. Refrigerators, well pumps, and air conditioners can draw several times their running watts for a few seconds when they start.

• Essentials only: A refrigerator, a freezer, a few lights, fans, a router, and phone chargers. A mid-size portable usually covers this.
• Essentials plus one cooling load: Add a window or portable AC unit for one room, or a well pump. This needs a larger portable and careful load management.
• Central air and most of the house: Usually requires a standby generator sized by an electrician. A soft-start device on the AC compressor can reduce the size needed. See the Florida AC guide.

Electric water heaters, ranges, dryers, pool pumps, and EV chargers draw heavy loads. Most backup setups leave them off or manage them through a load-shedding system. If the home has an EV charger, it should be on a circuit the generator setup can disconnect. See home EV chargers in Florida.

Connecting a generator safely: transfer switches and backfeed

There are only two safe ways to use a generator:

• Plug appliances directly into it with heavy-duty, outdoor-rated extension cords. Use three-prong cords for appliances with three-prong plugs.
• Have a licensed electrician connect it to the house wiring through a transfer switch or an approved panel interlock, which separates the home from the utility grid.

Plugging a generator into a wall outlet with a double-ended “suicide cord,” or wiring it straight into a breaker panel or meter box, can send power back out onto the utility lines. Florida Power & Light and Duke Energy both warn that backfed power can injure or kill neighbors and line crews, who may assume the lines are dead. It can also damage the generator and start a fire when grid power returns. Standby generators use an automatic transfer switch that handles this disconnection on its own.

Carbon monoxide: the biggest danger

Generator exhaust contains carbon monoxide, which has no color or smell and can kill within minutes. The U.S. Consumer Product Safety Commission estimates that about 100 people in the U.S. die each year from CO poisoning linked to portable generators, and deaths rise after hurricanes, when generator use spikes. CPSC and the Florida Department of Health recommend:

• Run portable generators outside only, at least 20 feet from the house, with the exhaust pointed away from the home and from neighbors’ windows.
• Never run one inside a home, garage, or shed, or on a porch or in a carport, even with the doors open. Open windows and fans don’t prevent CO buildup.
• Choose a portable model with a built-in CO shutoff feature, which turns the engine off if CO builds up around it.
• Install battery-operated or battery-backup CO alarms on every level and outside sleeping areas, and test them monthly. If an alarm sounds or anyone feels dizzy, sick, or weak, get outside and call 911.

Standby generators also produce CO. They need to be installed at the manufacturer’s and local code’s required clearances from windows, doors, vents, and air intakes, which is one reason the permit and inspection matter.

Fuel: gasoline, propane, and natural gas

Gasoline is the most common fuel for portable generators and the hardest to manage. Stations may close or run dry after a storm, stored gas goes stale without a stabilizer, and a portable may need refueling several times a day. Store gasoline only in approved containers, away from the house and out of children’s reach. Never refuel a running or hot generator, since spilled fuel on hot engine parts can ignite.

Propane stores for long periods without degrading, and dual-fuel portables can run on standard cylinders. Whole-home standby units run on natural gas where a utility gas line serves the street, or on a large propane tank where it doesn’t. Many Central Florida neighborhoods, especially rural and older areas, have no natural gas service. Before planning a standby system, check whether natural gas is available at the address.

Permits for generators in Central Florida

A portable generator used only with extension cords generally doesn’t need a permit. Anything that ties into the home’s wiring or gas piping does. That includes a power inlet box, a transfer switch or interlock, and any standby generator. Lake County’s residential generator checklist, for example, requires:

• A permit application signed by a licensed contractor or by the owner as an owner-builder.
• A one-line diagram showing the electrical and gas lines.
• A recorded Notice of Commencement for jobs over $5,000.

Other counties and cities have similar requirements, sometimes split into electrical, gas, and mechanical sub-permits. Check with the local building department before the work starts. Unpermitted generator work can cause trouble with inspections, insurance claims, and a future sale. See Florida building permits and regulations.

HOA and condo rules

Florida’s HOA law, section 720.3035(6), treats “exterior fixed generators” as hurricane protection, along with shutters, impact windows and doors, and certain roof systems. Each HOA board or architectural committee must adopt hurricane protection specifications, and it can’t deny an application that meets them, regardless of what older governing documents say. It can still set reasonable standards, such as color, screening, and conformity with the community’s existing look, and the installation must still meet setbacks and the building code. Get the community’s specifications before buying a standby unit. See Florida HOA rules.

The condominium statute’s hurricane protection section doesn’t mention generators. Condo owners usually can’t install a standby unit on their own. Running a portable generator on a balcony or in an enclosed garage is a carbon monoxide and fire hazard, and associations commonly prohibit it. Some buildings provide generator power for elevators, fire systems, and common areas only. Ask the association what the building’s backup covers before relying on it. See the Florida condo buying guide.

Sales tax exemption for portable generators

Florida stopped relying on short sales tax holidays for hurricane supplies. Since August 1, 2025, a list of disaster preparedness items has been permanently exempt from state sales tax, including portable generators that produce 10,000 running watts or less. The Department of Revenue’s guidance doesn’t set a price cap for generators. Permanently installed standby generators aren’t on the list. Batteries, smoke and CO alarms, fire extinguishers, and tarps are also exempt.

Maintenance so it works when it’s needed

• Portable units: Start and run under a light load every month or two. Use fuel stabilizer, or drain the fuel before storage. Keep spare oil, a spark plug, and the right extension cords with the generator.
• Standby units: Most run a short automatic self-test on a set schedule. Follow the manufacturer’s service intervals for oil, filters, and the battery, and keep vegetation, mulch, and stored items clear of the enclosure.
• Before hurricane season: Test the transfer switch or interlock, confirm the CO alarms work, and add generator steps to the hurricane prep checklist.

Alternatives: solar with batteries and portable power stations

Battery-based backup is silent and produces no exhaust, so it can be used indoors. A home battery paired with rooftop solar can recharge during a multi-day outage. Most grid-tied solar systems without a battery shut off when the grid goes down, a safety requirement that also prevents backfeed. Smaller portable power stations can run a refrigerator, a CPAP, or chargers for a limited time and can be recharged from solar panels or a car. See solar panels in Florida and Florida electric providers and net metering.

A generator doesn’t change the advice to evacuate. People in evacuation zones, mobile homes, or homes that can’t withstand the storm should still leave when told to. See when to evacuate in Florida and the Florida hurricane preparedness guide.

Sources

• U.S. Consumer Product Safety Commission, Safety Tips to Prevent Carbon Monoxide Poisoning and Fires (2026)
• U.S. Consumer Product Safety Commission, Carbon Monoxide Warning Ahead of Hurricane Idalia
• Florida Department of Health in Duval County, Carbon Monoxide Poisoning Prevention
• Florida Power & Light, Generator Safety
• Duke Energy, Generator Safety
• Florida Statutes, Section 720.3035 (Architectural control; hurricane protection)
• Florida Statutes, Section 718.113 (Condominium maintenance and improvements)
• Florida Department of Revenue, TIP 25A01-05: Disaster Preparedness Supplies Exemption
• Lake County Building Services, Generator Permit Checklist (CL8)
• FoodSafety.gov, Food Safety During a Power Outage

This article is for general informational purposes only and isn’t financial, legal, insurance, or tax advice – for guidance specific to your situation, talk to a licensed professional.