A whole-home standby generator is the one piece of storm preparation that keeps working after the storm has passed. The shutters come down, the water goes back in the cabinet, and the house can still be without power for days while the utility rebuilds lines. In South Florida that means air conditioning, refrigeration, well or lift pumps where a property has them, and medical equipment for some families. Atlantic hurricane season runs from June 1 to November 30 (National Hurricane Center climatology), and the best time to plan a standby installation is well before the first watch is issued.
This list covers standby generators that are currently sold in the United States by the manufacturers themselves, and it compares them on the features that matter on a coastal South Florida property: fuel, the transfer switch, the enclosure, clearance to the house, and how the unit is sized. It is not a ranking of installers. If you are choosing a contractor, see our separate list of the best electrical contractors in South Florida.
How we picked
Every model below is listed on its manufacturer's own website as a current home standby product, and we checked each specification against that page or the manufacturer's spec sheet. We looked for four things:
- Fuel flexibility. Each unit runs on natural gas or liquid propane (LP). Output is usually a little lower on natural gas, and the manufacturers publish both figures.
- Automatic transfer. A standby generator only protects the house if it is isolated from the utility. Each maker sells a matched automatic transfer switch, and several sell packages that include one.
- An enclosure suited to salt air. Aluminum or coated enclosures resist corrosion better near the water than bare steel, and some manufacturers publish a wind rating for the enclosure.
- Clearance and service access. Where the unit can sit relative to windows, doors and the wall of the house often decides whether a lot can take a standby generator at all.
We left out prices because they change with the season and the dealer, and because the installation (gas line, pad, transfer switch, permit) is a large share of the total. We also left out portable generators; they have a place, but they are not whole-home backup.
1. Generac Guardian 26kW (model 7291)
Generac's Guardian series is its air-cooled home standby line, and the 26kW model is its high-output option. Generac lists it at 26,000 watts on LP and 22,500 watts on natural gas, in an aluminum enclosure with a RhinoCoat powder-coated finish. The 7291 package pairs the generator with a whole-house transfer switch. It uses Generac's Evolution controller, and Generac's Mobile Link remote monitoring lets the owner check the unit's status and maintenance alerts from a phone.
Best for: a larger single-family home that wants the whole service backed up by an air-cooled unit.
Worth knowing: on natural gas the output drops to 22.5kW, so size the load on the fuel you will actually use.
2. Kohler 26kW (model 26RCAL)
Kohler's home generators are now sold under the Rehlko name, and the 26RCAL is its 26kW air-cooled model. Kohler lists it for natural gas and LPG, with an aluminum enclosure and its RDC2 controller, and offers it with or without an automatic transfer switch. Kohler states that its enclosures are designed to endure winds up to 181 mph, which is a relevant claim for coastal buyers, though it describes the enclosure, not how the unit is anchored to the pad on your lot.
Best for: owners who want a published enclosure wind figure and an aluminum housing near salt air.
Worth knowing: the anchoring still has to satisfy the permit on your property, whatever the enclosure is rated for.
3. Briggs & Stratton PowerProtect 26kW
Briggs & Stratton's PowerProtect 26kW runs on natural gas or LP and is rated at 26kW on propane and 24kW on natural gas, a smaller drop on gas than some rivals. Briggs describes a reinforced, corrosion-resistant aluminum enclosure and base with its Dura-Zen coating, and states that the unit is approved for installation as close as 18 inches to a building. The transfer switch and load management modules are sold separately, which lets an installer match them to the panel.
Best for: homes on natural gas, and tight side yards where the 18-inch clearance matters.
Worth knowing: the 18-inch figure is clearance to the wall; separate distances to windows, doors and vents still apply.
4. Generac 32kW XG Protector Series (XG03245ANAX)
For a large home, or one with several big air handlers, Generac's liquid-cooled XG Protector line is the step up from air-cooled units. The 32kW model uses a 4.5L Generac engine, runs on LP or natural gas (selectable at the controller), and sits in an aluminum enclosure that Generac describes as having corrosion-resistant components. It has Generac's 410 controller, a Quiet-Test mode that runs a slower, quieter weekly exercise, and cellular Mobile Link monitoring. Generac also sells 40kW and 48kW sizes in the XG series.
Best for: large homes and properties that need long run times with heavy loads.
Worth knowing: it is a much heavier and larger machine than an air-cooled unit, so the pad, access for delivery, and the fuel supply all need planning.
5. Cummins QuietConnect Series (RS22 and RS30)
Cummins is better known for commercial generators and engines, and its QuietConnect series is the company's home standby line. The 22kW and 30kW QuietConnect models run on natural gas or liquid propane, and Cummins says its weather-protective, sound-insulated enclosures keep noise at 65 dB or lower, about the level of normal conversation. The units use Cummins' PowerCommand control and connect through an automatic transfer switch, and they can send the owner alerts when service is due.
Best for: homes where noise matters: close neighbors, a pool deck or a bedroom near the pad.
Worth knowing: Cummins sells through its own dealer network, so check that a local dealer supports the model before you commit.
6. Champion 14kW aXis Home Standby (model 100837)
Not every house needs 26kW. Champion's 14kW aXis system is sold with a 200A whole-house automatic transfer switch and runs on propane (14,000 watts) or natural gas (12,500 watts). Its aXis switch includes load management, so the installer can rank appliances from must-have to nice-to-have and the generator sheds the lower-priority loads when it runs short. Champion's power line carrier technology lets the generator talk to the switch over the home's existing wiring.
Best for: smaller homes and townhomes with room for a pad that want automatic backup for the essentials plus managed air conditioning.
Worth knowing: Champion lists a steel enclosure, so on a waterfront lot ask about placement and upkeep to limit salt exposure.
Comparison at a glance
| Model | Fuel | Cooling | Enclosure (per maker) | Noted for |
|---|---|---|---|---|
| Generac Guardian 26kW | LP or natural gas | Air | Aluminum, powder-coated | Whole-house switch package, remote monitoring |
| Kohler 26RCAL | Natural gas or LPG | Air | Aluminum | Published enclosure wind figure |
| Briggs & Stratton PowerProtect 26kW | LP or natural gas | Air | Coated, corrosion-resistant aluminum | 18-inch clearance to a building |
| Generac XG Protector 32kW | LP or natural gas | Liquid | Aluminum, corrosion-resistant parts | Large homes, heavy loads |
| Cummins QuietConnect RS22/RS30 | Natural gas or LP | Air | Sound-insulated, weather-protective | Low noise |
| Champion aXis 14kW | LP or natural gas | Air | Steel | Load management on a smaller unit |
The South Florida details that decide the installation
Natural gas or propane
Natural gas never needs a delivery, which is its great advantage after a storm, but not every South Florida street has a gas main, and the meter has to be large enough for the generator and the home's other gas appliances together. Propane works anywhere, but the tank has to be sized for the run time you want and placed to meet its own setbacks. Ask your gas utility or propane supplier about capacity before choosing the generator size.
The transfer switch is not optional
A standby generator must be isolated from the utility so the two can never feed the house at the same time. An automatic transfer switch senses the outage, starts the generator and moves the load, then moves it back when utility power returns. Whether that switch backs up the whole service or a smaller panel of selected circuits is the main sizing decision, and it often goes hand in hand with a panel upgrade on older homes.
HVHZ anchoring in Miami-Dade and Broward
Miami-Dade and Broward are both inside the High-Velocity Hurricane Zone of the Florida Building Code, so the generator pad and its anchoring are reviewed alongside the electrical permit. Palm Beach County sits outside that zone and is assessed differently. A manufacturer's enclosure wind rating is useful information, but it does not replace the anchoring the permit calls for on your lot.
Exhaust and clearance
Generators produce carbon monoxide, so placement is a safety issue as well as a code one. Generac's own guidance, for example, calls for 18 inches from the back of a tested unit to the wall, 5 feet from windows, doors and other openings, and 3 feet of working space at the front and ends (Generac clearance guidance). Other brands publish their own figures, and the installation manual for the exact model governs.
Corrosion
Salt air attacks fasteners, hinges and connections as well as the enclosure. On a waterfront or barrier-island property, choose an aluminum or coated enclosure, keep the unit out of direct spray where you can, and budget for regular maintenance visits. Flooding is the other hazard: set the pad high enough that storm surge or standing water is not going to reach the unit.
Frequently asked questions
What size standby generator does a South Florida home need?
It depends on what has to keep running. Air conditioning is usually the largest load, followed by electric water heating, cooking, and pool equipment. An electrician should look at the service size and the big loads before you pick a unit; load management can let a smaller generator carry a larger house by shedding low-priority loads.
Do I need a permit for a standby generator?
Yes. A standby generator is a permitted installation involving electrical work, the gas or propane connection, and in Miami-Dade and Broward the pad and anchoring. The contractor pulling the permit arranges the inspections.
Can I just plug a portable generator into a wall outlet?
No. Backfeeding a house through a receptacle can push voltage back onto utility lines where crews are working and bypasses the home's overcurrent protection. A transfer switch or interlock installed by an electrician is the safe way to connect a portable set. Our storm readiness guide covers this in more detail.
How often should a standby generator be serviced?
Follow the maintenance schedule in the manufacturer's manual. Most units run a short self-test every week, and near the coast it is worth having the enclosure, battery and connections checked before each hurricane season starts.
Getting the electrical side right
The generator brand matters less than the installation behind it: a correctly sized transfer switch, a panel with room for it, the right fuel supply, and a pad and anchoring that pass inspection. KRW Electric installs and connects standby generators, transfer equipment and the panel work behind them across Miami-Dade, Broward and Palm Beach counties, and handles the permit and inspection on its jobs. See generator installation for how we approach it, or get in touch to talk through your property. For backup planning more broadly, read storm readiness and backup power, and if your panel is the weak link, see our list of the best panel upgrade electricians in South Florida.
Reviewed by Kyle White, KRW Electric Company LLC — licensed electrical contractor EC13012832.
