How to Choose a Generator for Hurricane Season

Choosing a generator in June is a much better experience than choosing one when a storm cone is pointing at your county and every store shelf is empty. Hurricane use has specific requirements: long run times, fuel that stays usable through a whole season, the ability to feed an air conditioner or well pump, and a safe place to run it in wind and rain. This guide is a buying checklist focused on those requirements, so you end up with a machine sized and configured for a week without the grid, not just a weekend.

Step 1: Size for the loads you will actually run

List your essentials and add running watts, then add the single largest starting surge. Motor loads like refrigerators, window AC units, and well pumps draw two to three times their running watts for a second or two when they start.

A home with a fridge, one 8,000 BTU window unit, a sump pump, and small loads needs about 2,800W running and roughly 4,500W to handle the largest start. A 4,000 to 5,000 running-watt generator is the comfortable fit. Add a well pump and a second AC and you move into the 6,500 to 8,000W class.

Don’t size for central air unless you plan for it

Central air conditioners of 3 to 4 tons typically need 3,500 to 5,000W running and a much larger surge. Running one from a portable generator usually requires a 9,000W-plus unit plus a soft-start kit on the compressor, and a professionally installed interlock or transfer switch.

Step 2: Pick the fuel strategy before the model

Gasoline only

Easiest to find in normal times, hardest after a storm. Gasoline begins to degrade in 30 to 90 days, faster in heat and humidity. If you choose gas, commit to stabilizer, rotating cans into your car monthly, and a storage limit your local fire code allows.

Dual fuel (gas and propane)

The most practical choice for coastal areas. Propane stores indefinitely, you can fill cylinders in May, and the generator runs cleaner with less carburetor gumming between seasons. Output on propane is typically 8 to 15 percent lower, so size with the propane rating in mind.

Tri fuel or natural gas conversion

If your home has a natural gas line, a tri fuel generator or a standby unit avoids fuel runs entirely, although gas service can also be interrupted in severe flooding.

Step 3: Inverter or open frame

Inverter generators produce clean power with low total harmonic distortion, typically under 3 percent, and throttle down at light loads, which saves 20 to 40 percent fuel overnight. They are also quieter, often 52 to 60 dBA at 23 feet. Open-frame generators deliver more watts per dollar and handle heavy motor starts well but run at constant speed and are louder, often 68 to 75 dBA. For hurricane use, a 4,000 to 5,000W inverter is the sweet spot for most homes; an open-frame 7,000 to 9,500W unit makes sense when you have a well pump plus multiple AC units.

Step 4: Connection to the house

Extension cords work for a fridge and a couple of fans, but for a sump pump, well pump, or hardwired furnace fan you want a power inlet box with an interlock kit or a manual transfer switch, installed by an electrician. Match the generator’s outlet, usually a 30A L14-30 or 50A 14-50, to the inlet. Never backfeed through a dryer outlet; it can electrocute line workers restoring your street.

Step 5: Features that matter in storm conditions

• Electric start with a maintained battery, because pull-starting in a wet yard at night is miserable.
• Automatic CO shutoff sensors, now common on newer models.
• Fuel gauge and a tank that gives 8 to 12 hours at 25 to 50 percent load.
• Low-oil shutdown.
• A compatible running cover or ventilated tent so it can run in rain without being moved closer to the house.
• Wheel kit and handles; you will move it before and after the storm.

Pre-season maintenance timeline

FAQ

How many hours can a generator safely run continuously?

Most portable generators can run as long as fuel lasts, but shut down every 12 to 24 hours to check oil. Many air-cooled engines burn a little oil, and running low is the most common cause of storm-week failures.

Should I buy a bigger generator than I need?

Oversizing by 20 to 30 percent is sensible for starting surges and future loads, but a generator running at 10 percent load wastes fuel. For long outages, fuel efficiency at light load matters more than peak watts.

Bottom line

For hurricane season, start with a load list, pick a dual fuel strategy, and buy the smallest generator that covers your largest start plus running loads with 20 percent headroom. For most homes that is a 4,000 to 5,000W dual fuel inverter, connected through an inlet box, tested in June, and stocked with a week of fuel before the first storm forms.