What this scenario actually looks like
Not a two-hour interruption. This page is written for the event the EIA's 2024 data describes: hurricanes Beryl, Helene and Milton accounted for 80% of all U.S. outage hours that year, and customers in South Carolina averaged nearly 53 hours of interruption across 2024.
The shape of it, in order:
- The storm itself. Power goes out while the wind is still dangerous. A generator cannot be started or run safely, and going outside to try is a bad idea. Anything that helps in this window has to work indoors.
- The first night. The wind drops. The fridge has been off for six hours. It is dark, possibly hot, possibly cold, and nobody knows how long this lasts.
- Days two to five. The generator becomes the whole plan. Fuel becomes a logistics problem, because station pumps are electric and the ones with power have queues.
- Day five onward, if unlucky. Stored fuel is gone. What keeps working is whatever needs no fuel.
Equipment that handles only stage three is the common mistake. The kit below covers all four.
The sizing math for this scenario
Storm outages are usually warm-weather events in hurricane regions and cold-weather events in ice-storm regions, so the load lists differ:
| Load | Running W | Starting W | Season |
|---|
| Refrigerator | 150–400 | 800–1,200 | Both |
|---|
| Freezer | 100–500 | 500–1,000 | Both |
|---|
| Sump pump (⅓ HP) | 500–800 | 1,000–1,600 | Both — storms mean water |
|---|
| Window AC (10,000 BTU) | 900–1,200 | 1,800–2,400 | Hurricane season |
|---|
| Furnace fan (½ HP) | 300–800 | 800–1,600 | Ice storm |
|---|
| Well pump (½ HP) | 750–1,000 | 1,500–2,000 | Both, if applicable |
|---|
| Router, modem, lighting | ~110 | — | Both |
|---|
Source: Champion Power Equipment's published wattage chart, except the router and modem figure, which comes from typical consumer power-supply ratings.
Taking the upper end of a summer list — fridge, freezer, sump pump, window AC, lighting — gives about 3,010W running. The largest surge is the window air conditioner at 2,400W, so peak = 3,010 − 1,200 + 2,400 = 4,210W. That is why 5,300 running watts is the tier this page recommends: it covers the list with real margin rather than marketing margin. The full method.
Match the purchase to the outage
Capacity is not a preference. It falls out of two numbers: how long your power is usually off, and what you refuse to lose while it is.
| Your outage lasts | What has to keep running | Realistic product class |
|---|
| During the storm | Fridge, router, lights — indoors only | A battery. A generator cannot be used yet.
See power stations |
|---|
| Day 1–2 | Above, plus a sump pump and cooling or heating | 5,300W dual-fuel generator, run in blocks
See the hurricane picks |
|---|
| Day 3–5 | Same, with fuel becoming the constraint | Generator plus battery, block running
The fuel arithmetic |
|---|
| Day 5+ | Fridge and communications, minimum viable | Battery plus solar — the only fuel-free option
See solar generators |
|---|
The full kit list
Not just the headline machine. This is everything, and the small items are the ones people discover they need at the worst moment.
- A battery, 1,000Wh+ with an 1,800W inverter — works during the storm, indoors, silently
- A generator, 5,000W+, dual fuel, electric start
- A transfer switch or interlock kit, professionally fitted, out of season
- A 25 ft L14-30 cord, so the generator can sit twenty feet away
- CO alarms on every level, with battery backup, tested
- A generator cover or open-sided shelter — never a tarp
- Fuel: three to four five-gallon cans, treated and rotated, plus two or three propane cylinders
- Engine oil and a funnel, the grade your manual specifies — you may need an oil change on day two
- Solar panels, 200W+, if fuel may become unobtainable
- A small UPS on the modem and router, so the internet survives the switchover
- Flashlights and battery lanterns — not candles
- Water, especially on a private well, where no power means no water at all
Three budget tiers
Tier 1 — the first night, indoors
A 1,000–1,200Wh battery with an 1,800W inverter, plus CO alarms if you might ever use a generator. Covers the fridge for about six hours, the router for two days, and works while the storm is still happening. For a region with occasional overnight outages, this is a complete answer.
Tier 2 — days two to five
Add a 5,000W+ dual-fuel generator, a transfer switch fitted by an electrician, a 25-foot cord, a cover, and fuel. This is the serious storm-region purchase and it is where most of the money goes. Run it in blocks rather than continuously.
Tier 3 — when the fuel runs out
Add 200–400W of solar panel, and consider a larger battery. This is the tier for genuine regional disasters where nothing can be bought for days, and it is the one that keeps working when everything else has stopped.
Run it in blocks, not continuously
What it costs to actually run
The sticker price of a dual-fuel generator is a fraction of what it costs you. The sticker price of a battery is nearly all of it. Here is the arithmetic, with the inputs stated so you can redo it with your own fuel price.
| Unit | Published consumption | Cost per hour | Cost per 24 h |
|---|
| Generator, continuous | 0.75 gal/hr × 24 h = 18 gal/day | $3.05 | $73.28 |
|---|
| Generator, 6 h blocks | 0.75 gal/hr × 6 h = 4.5 gal/day | $3.05 | $18.32 |
|---|
| Generator 2 h + battery overnight | 0.75 gal/hr × 2 h = 1.5 gal/day | $3.05 | $6.11 |
|---|
Gasoline at $4.071/gal (EIA weekly retail, week ending 31 August 2026). Five days of continuous running is 90 gallons — eighteen five-gallon cans, well beyond what any residential garage may legally store. Five days of the bottom row is 7.5 gallons, which is two cans. That is the difference between a plan and a problem.
Block running is safe for food: the USDA puts a sealed refrigerator at about four hours and a full freezer at about 48. Run the generator hard for two hours to cool everything down and fill the battery, then run the essentials off the battery overnight.
The rules that do not bend
Twenty feet, exhaust pointed away, every time. CPSC records nearly 100 deaths a year from portable generator carbon monoxide, most in residential locations, concentrated around storms. Not in a garage, not on a porch, not in a carport, not under a window — and not on day four when everyone is tired. The full guide.
Never backfeed. A double-male cord into a wall outlet sends power up the utility line at lethal voltage and can kill the lineworker restoring your street. The safe methods.
Never run the generator during the storm. It cannot be used safely in high wind and driving rain, and that is exactly the window the battery exists for.
Before the season, not during it
- Get the transfer switch fitted. Electricians are unavailable when a storm is forecast.
- Start the generator, run it under load for fifteen minutes, change the oil if it is due.
- Rotate the stored fuel and refill the propane cylinders.
- Charge the battery fully, then take it down to 60–80% for storage.
- Test every CO alarm and check its manufacture date — sensors expire.
- Decide where the generator will stand, measure twenty feet, and confirm the cord reaches.
- Look up your utility's outage number and save it in your phone.
Then the outage sequence is the thing to read when it actually happens.
