What Size Generator Does Your Fort Lauderdale Home Need?

Storms don’t wait for a good time. Hurricane season runs through November, and the outages that come with it tend to hit hardest in the homes that never got around to backup power, or whose old unit finally gave out this year. 

If you’re now looking at standby generators for the first time, or replacing one that failed, the question isn’t just whether to install one. It’s what size actually fits your home, your appliances, and how much of your daily life you want to keep running when the grid doesn’t.

What Size Standby Generator Does a Fort Lauderdale Home Need?

According to NOAA, the Atlantic hurricane season historically peaks in early-to-mid September, which is exactly when Fort Lauderdale homeowners start calling around asking how fast a generator can be installed.

Here’s the honest answer: installation typically takes one to three weeks once permits are factored in. That means September is late in the season to start the process, but it isn’t too late. Homes whose old units failed this year, or whose owners simply never got around to it, still have time to get set up before the next system develops.

Sizing the right unit, though, isn’t as simple as picking the biggest option available. It comes down to what you actually want powered when the grid goes down, and matching that load to the right equipment.

Start With What “Powered” Means to You

Every household has a different definition of emergency power. Before you look at a single spec sheet, decide which category describes your home.

Essentials-Only Coverage

This is the baseline most South Florida homeowners start with. An essentials-only setup typically covers:

• Refrigerator and freezer
• A few circuits of lighting
• Well pump or sump pump, if applicable
• One AC zone or a mini-split, so at least part of the house stays comfortable
• Any vital medical equipment
• Phone chargers and a modem/router for communication

This tier usually calls for a smaller standby unit, often in the 14kW to 22kW range depending on how many of these loads run simultaneously.

Whole Home Coverage

Whole home generators are built to carry the full electrical panel, meaning central air conditioning, the water heater, kitchen appliances, and every outlet in the house stay active without any manual rationing of power. 

For South Florida in particular, where a stretch without air conditioning isn’t just uncomfortable but a genuine heat-related health concern, this tier has become the more common request. 

Whole house generator sizing for a full-panel setup often lands between 22kW and 48kW or higher, depending on square footage and how many high-draw appliances run on the same schedule.

How the Load Calculation Works for Generators

A proper sizing decision isn’t a guess based on square footage alone. It’s a calculation of the electrical loads a generator will need to start and sustain at the same time.

There are two numbers that matter:

Running watts are what an appliance draws continuously once it’s on. A central AC condenser, a refrigerator, and a water heater all have a steady running load.

Starting watts (sometimes called surge watts) are the short burst of extra power a motor-driven appliance needs the instant it kicks on, often two to three times its running wattage. Air conditioners, well pumps, and refrigerators all spike this way.

The generator has to be sized not just for the sum of every running watt, but for the highest possible moment when several appliances start in overlapping succession. This is where an electrician walks the property, reviews the panel, and adds up both figures room by room rather than relying on a rough estimate. It’s also where panel condition comes into play, since an older or undersized panel can limit what a new generator is able to deliver safely, regardless of the unit’s rated output.

The Most Common Generator Sizing Mistakes

Buying Based on House Size, Not Load

A 3,000-square-foot home with an electric range, a pool pump, and two AC units needs a different unit than a 3,000-square-foot home without those loads. Square footage is a starting point for a conversation, not a sizing method.

Forgetting About Future Additions

If a bidirectional EV charger, battery storage, or a second AC unit is somewhere on the horizon, that load should factor into the sizing conversation now. Right-sizing a system that can’t accommodate a planned addition means paying for an upgrade twice.

Underestimating Startup Loads

Homeowners often total up running watts and stop there, missing the surge that happens when the AC compressor and refrigerator happen to kick on at the same moment. A unit that looks adequate on paper can stall out in practice if starting watts weren’t part of the math.

Skipping the Panel Assessment

A generator is only as reliable as the panel and transfer switch it connects to. Older homes sometimes need panel upgrades alongside the generator itself to run the load safely.

Why the Calendar Still Matters

Hurricane season doesn’t wrap up when September ends. Storm activity in South Florida typically continues into October and November, so a generator installed this month still has real value for the rest of the season, plus every year after it. 

For anyone whose backup power failed during a recent outage, replacing it now, before the next storm forms, closes the gap while there’s still time to act.

Getting an Accurate Number for Your Home

There’s no substitute for a professional load calculation done by someone who’s walked your panel and asked what you actually want to keep running. C.W. Fischer Electric has spent years helping Fort Lauderdale homeowners size and install standby generators that match their homes, not a generic estimate. 

If you’re weighing essentials-only against a full whole-home system, or your existing unit didn’t make it through this year’s storms, our team can walk the property, run the numbers, and recommend the right fit for emergency power before the next system takes aim at South Florida. Call 954-417-1762 or reach out today to get on the schedule.