Editor's Note, 11 October 2026: We rewrote this guide from scratch. The old version never said who a portable generator is wrong for, and one of its headline figures, a 2,000 to 3,500 hour lifespan, had no source. This one starts from how long the power actually goes out, and says where the figures come from.
A portable generator is a gasoline or dual-fuel engine that turns an alternator and gives you 120 volt power wherever you put it. Buy one if outages where you live last a day or more, or if you camp, RV or work somewhere with no hookup. Skip it if the power only ever drops for an hour or two: a battery power station does that job with no fuel and no exhaust.
They work. The real question is how often you'd run one.
Who Should Buy One, Who Shouldn't
| Your situation | Best fit | Why |
|---|---|---|
| Storm or ice outages that last days | Portable gas or dual-fuel generator | A tank can be refilled; a battery can't |
| RV or travel trailer with an air conditioner | Gas inverter generator, 2,000 to 3,500 W | Needs surge watts a battery rarely has |
| Tent camping, car camping, tailgating | Small inverter or a battery station | Phones, lights and a fridge don't need an engine |
| Outages of a few hours, a few times a year | Battery power station | No fuel to store, safe indoors |
| Work site, tools, no mains | Gas generator | Runs all day on a refill |
| Whole-house power every outage | Standby generator, not portable | Portable units run a few circuits, by cord |
If you're in the first or second row, read on. If you're in the fourth, our best solar generators guide covers the battery route, and our guide to how long they last tells you what you're committing to.
How Long the Power Goes Out
The US Energy Information Administration tracks outage time per customer. The numbers are smaller than most people assume, and the long tail is what you're insuring against.
- 2022: the average customer lost power for five and a half hours.
- 2024: the average was 11 hours, nearly twice the decade before it, because Hurricanes Beryl, Helene and Milton accounted for 80 percent of the hours.
- Without major storms, interruptions routinely average about two hours a year.
- By state in 2024: South Carolina customers averaged nearly 53 hours. Arizona, South Dakota, North Dakota and Massachusetts averaged under two.
So the typical year is an outage shorter than a tank of gas. A generator earns its keep in the unusual year, the ice storm or the hurricane, and in places where lines run through trees. Where you live decides it more than anything in a spec sheet.
What a Tank Buys You
A small inverter generator isn't a house. Take the Honda EU2200i. Honda rates it at 3.2 to 8.1 hours per 0.95 gallon tank, depending on load, and it weighs about 47 pounds.
Run that against a 24 hour outage:
- At the light end of the range, 8.1 hours a tank, you'd refuel three times and use about 3 gallons.
- At the heavy end, 3.2 hours a tank, you'd refuel more than seven times and use about 7 gallons.
That's arithmetic on the maker's own rating, not a test result, and real runtime moves with load and temperature. The shape is what matters: a day of power is a handful of fuel cans, stored safely, and a refill every few hours. Our noise and runtime database lists each rating beside the load it was quoted at.
Gas, Battery or Standby
| Portable gas generator | Battery power station | Standby generator | |
|---|---|---|---|
| How long it runs | As long as you add fuel | Until the battery is empty | As long as its fuel supply lasts |
| Use indoors | Never | Yes | Not applicable, installed outside |
| Carbon monoxide risk | Yes | None | Yes |
| Noise | Inverters are quiet, open-frame models are loud | Fan noise only | Varies by model |
| Upkeep | Oil, fuel and filters | Charge it now and then | Servicing, like any engine |
| Carry it | One or two people; 25 to 131 lb across the models in our database | One person for most models | No, it's fixed |
| Powers a house | By cord, or through a transfer switch | A few circuits at most | Yes |
Our rule: if the load fits in a battery and the outage fits in a day, a battery is the nicer thing to own. If either one is bigger, fuel wins.
Upkeep and Lifespan
Makers don't publish a lifespan for portable generators the way they publish a warranty. What you can find is service guidance. Champion's maintenance schedule says to change the oil after the first 5 hours, then about every 100 hours, and states that a well maintained portable generator can last 10 to 15 years. That's a maker's claim about its own product, so read it as an indication, not a guarantee.
The old version of this guide said most portable generators run 2,000 to 3,500 hours. We couldn't find a source for that figure and we've removed it.
Warranty is the commitment in writing. The Honda EU2200i carries a three year residential warranty. Terms differ by brand, so read the warranty before you read the review.
Three Safety Rules That Aren't Optional
Outside, 20 feet away. The Consumer Product Safety Commission says an average of nearly 100 people die each year in the US from carbon monoxide poisoning caused by portable generators. Its advice is outdoors only, at least 20 feet from homes with the exhaust facing away, never in a garage, even with the door open.
Keep it dry. Honda's EU2000i owner's manual tells you not to expose the generator to moisture, rain or snow. If you need to run one in wet weather, you need cover that leaves the exhaust free and the sides open, and you should confirm that against your own manual.
Never plug it into a wall outlet. Backfeeding your house wiring can kill a lineworker. A transfer switch or an interlock, fitted by an electrician to local code, is how a generator feeds a panel. Otherwise use heavy-duty extension cords straight to the loads.
What We'd Buy
For camping and tailgating, a small inverter. Our best camping generators guide and the best small generators guide rank ten each, and the best quiet generators guide is where to look if neighbours or campground rules matter.
For an RV, start with our best generators for RVs and what size generator a camper needs. For outages at home, an inverter generator in the 2,000 to 3,500 watt range covers a fridge, lights and a few devices, and our best inverter generators guide has ten. The Honda EU2200i review covers the quiet benchmark. Pick your use first; the best generators hub sorts all of it by use.
Portable Generator FAQ
Are portable generators worth it?
They're worth it if you face multi-day outages or camp, RV or work where there's no mains. For the typical outage of an hour or two, a battery power station covers it with no fuel to store. EIA data shows the average US customer lost 11 hours of power in 2024, 80 percent of it from major storms.
How long do portable generators last?
Makers don't publish a lifespan in hours. Champion says a well maintained unit can last 10 to 15 years, with the oil changed after the first 5 hours and then about every 100 hours. Treat that as one maker's claim and check the warranty term of the model you're looking at.
Can you run a portable generator in the rain?
Not unprotected. Honda's owner's manual says not to expose the generator to moisture, rain or snow. Cover it with a canopy or tent that keeps the sides open so the exhaust can clear, and check your own manual.
Is a portable generator better than a standby generator?
It depends on the job. A portable generator moves, needs no installation and powers what you cord to it. A standby generator is fixed, starts itself and feeds the whole panel. If your outages are short and rare, a portable one or a battery is usually the easier fit.
