Five portable generator features separate a machine you’ll trust from one you’ll fight: honest running watts, clean power under 3% THD, a CO shutoff, the right outlets, and a start system you’ll actually use. For home backup, the big tells are 120/240V power, an L14-30R outlet, transfer-switch readiness, electric or remote start, and dual fuel.
Everything else is trim unless it solves a real problem for how you’ll use the generator. Campers should also read our dedicated camping generator features guide, because this page covers the whole market with extra weight on home-backup features.
Starting vs running watts: buy the number that actually carries the load
Running watts are what the generator can supply continuously; starting watts are the short surge it can deliver when motors kick on. Motors often need 2-3x their running draw for a second, so a 700W refrigerator can surge around 2,200W.
That’s why spec sheets list two wattage numbers. The Westinghouse WGen9500DF, for example, is rated at 12,500 starting watts and 9,500 running watts on gasoline, then 11,200 starting watts and 8,500 running watts on propane per Westinghouse’s published figures.
Don’t size a home-backup generator by peak watts alone. Add the running loads you plan to use, then leave room for the largest motor surge; our generator wattage calculator is built for that exact math.
The common mistake is buying for the sticker number and ignoring the smaller running-watt number. A generator that looks huge by surge rating can still feel weak if your refrigerator, well pump, furnace blower, microwave, and lights are all competing for continuous output.
Clean power and THD: protect electronics without overbuying
THD stands for total harmonic distortion. The clean-power line for sensitive electronics is under 3% THD, and Honda lists the EU2200i below that mark.
That makes the Honda EU2200i a clean-power example for laptops, routers, battery chargers, TVs, and modern controls. It’s rated at 2,200 starting watts and 1,800 running watts, weighs 47.4 lb, and runs at 48-57 dBA per Honda’s published figures.
Open-frame AVR generators can still be the right tool for pumps, saws, heaters, and basic resistive loads. You don’t automatically need an inverter generator for every job, but you do want inverter-grade power if your load is full of electronics.
If you’re sorting out the difference, start with our plain-English guide to what an inverter generator is. For buyers who know they want clean portable power first, our best inverter generators guide narrows the field.
Fuel type and dual fuel: convenience beats theory in an outage
Gasoline has the highest convenience during normal weeks because every town has gas stations. During storms, that convenience can disappear fast, and untreated gasoline degrades in about 30 days per Honda’s storage guidance.
Propane stores indefinitely, which is why dual fuel is more than a spec-sheet bonus. Champion’s 200961 is a good small example: it’s rated at 2,500 starting watts and 1,850 running watts on gasoline, 1,665 running watts on propane, and weighs 39 lb.
Champion’s published runtime for the 200961 is up to 34 hr at 25% load on a 20-lb propane tank. A 20-lb propane tank equals 4.7 gallons equivalent, so that runtime is tied to a light load, not full output.
For home backup, dual fuel gives you options. Run gasoline when you have it fresh, keep propane as the long-storage storm plan, and avoid betting the whole house on one fuel supply.
Start type: recoil, electric, and remote start are not equal
Recoil start is simple and reliable, but it’s also the feature people hate most during bad weather. A pull cord on a small suitcase generator is one thing; a heavy home-backup unit in the rain is another.
Electric start is the comfort line for larger generators. Champion’s 76533 includes electric start with a battery, and it also carries an Intelligauge that shows volts, hertz, and hours.
Remote start is even better for storm duty as long as you still run the generator outdoors. The Westinghouse WGen9500DF has a remote-start key fob, and the WGen7500DF has push-button electric start plus a remote fob per Westinghouse’s spec sheet.
The practical rule is simple: the bigger the generator, the more start type matters. If someone else in the house may need to start it, electric start moves from nice-to-have to must-have.
CO sensors: the safety feature you should not skip
A CO shutoff automatically stops the generator when carbon monoxide builds near the unit. It’s now near-standard on new inverter generators, but it’s still absent on many older or budget open-frame models.
Brands use different names for the same life-safety idea: Honda calls it CO-MINDER, Champion calls it CO Shield, Briggs & Stratton calls it CO Guard, DeWalt calls it CO-Protect, and Generac calls it COsense. The Honda EU2200i carries CO-MINDER, and the DeWalt DXGNi2200 carries CO-Protect.
A CO sensor is not permission to run a generator close to the house. Use the 20-ft placement rule, keep exhaust pointed away from doors and windows, and review our guide to preventing carbon monoxide poisoning before the first outage.
This is one of the few features I’d treat as a hard requirement for a new portable generator. You still need proper placement, but automatic shutoff adds protection when wind shifts or someone makes a bad call under stress.
EFI vs carburetor: storage reliability matters
Most portable generators use carburetors, and carburetors hate stale gas. Electronic fuel injection, or EFI, eliminates carburetor gumming, which is the top storage failure for gasoline generators.
EFI shows up on premium units, including Honda’s EU7000iS. It costs more, but the payoff is fewer fuel-system headaches after the generator sits between outages.
If you buy a carbureted generator, storage habits matter more than the badge on the side. Use fresh fuel, follow the manufacturer’s storage procedure, and don’t leave old gasoline sitting in the system for months.
Noise honesty: read dBA ratings with the load in mind
Noise ratings are useful, but only if you compare the same kind of generator and remember that load raises noise. Inverters commonly sit around 48-61 dBA, while open-frame units are often around 72 dBA or louder.
The Honda EU2200i is published at 48-57 dBA, which fits its role as a quiet suitcase inverter. The Westinghouse WGen7500DF is listed at 72 dBA, which is normal for a larger open-frame dual-fuel unit.
That doesn’t mean the quieter generator is better for every buyer. A small inverter may be pleasant at a campsite, but it won’t run the same home loads as a 120/240V open-frame unit.
For a deeper sense of what those sound levels mean in a yard or campground, read our guide to how loud a generator is. The short version: buy enough power, then manage placement and distance.
Outlets: match the receptacle to the job
Outlets decide what the generator can actually power. The right wattage with the wrong receptacle is still the wrong generator.
| Outlet | What it supplies | Best use |
|---|---|---|
| 5-20R | Household 120V/20A | Extension cords, tools, small appliances; GFCI on jobsite-oriented units |
| TT-30R | RV 120V/30A | Travel trailers and RV shore-power cords |
| L5-30R | 120V/30A twist-lock | Locked 120V connection; adapter needed for RVs |
| L14-30R | 120/240V/30A transfer-ready | Home backup through a transfer switch or interlock |
| 12V DC/USB | Small low-voltage charging | Small inverter charging ports |
The Westinghouse WGen7500DF is a good home/jobsite outlet example because it has 2x GFCI 5-20R duplex outlets plus an L14-30R. That means it can run normal cord-connected loads and also has the 120/240V twist-lock outlet home-backup buyers should be looking for.
For suitcase inverters, the DeWalt DXGNi2200 is a clean GFCI example with dual GFCI duplex 5-20R outlets plus CO-Protect. We cover that setup in our full DeWalt DXGNi2200 review.
If outlet names blur together, bookmark our guide to portable generator receptacles. The most common expensive mistake is buying an RV-ready generator for home backup or a home-backup generator without the RV outlet you expected.
Tank, fuel gauge, hour meter, and runtime fine print
Runtime specs are not all quoted the same way. Some are listed at 25% load, some at 50% load, and 25% of a 9,500W generator is still about 2,375W.
Westinghouse lists the WGen7500DF with a 6.6 gal tank and up to 11 hr runtime. That figure is useful, but only if you compare it against the load condition used for the rating.
A fuel gauge matters more on home-backup generators than on tiny inverters because the unit may run through the night. The WGen9500DF includes a fuel gauge, which is the kind of basic feature you appreciate at midnight.
An hour meter helps with maintenance because oil changes and service intervals are based on run time, not guesses. Champion’s 76533 includes an Intelligauge with volts, hertz, and hours, so it gives both operating feedback and maintenance tracking.
Mobility: weight class changes how often you’ll use it
Portable does not always mean easy to move. The verified examples here range from the 39 lb Champion 200961 suitcase class to the 194 lb Westinghouse WGen7500DF cart class.
Small inverters are built for lifting into a truck, carrying to a picnic table, or storing on a shelf. Larger home-backup units need wheels, handles, and a storage spot that doesn’t require deadlifting the machine every time the lights go out.
Wheel kits are not cosmetic on open-frame generators. Lift hooks matter on jobsite units, but homeowners usually care more about rolling the generator from the garage to a safe outdoor running location.
Home backup: the three features that matter most
For home backup, the top features are an L14-30R 120/240V outlet, electric or remote start, and dual fuel. Those three decide whether the generator can connect safely, start easily, and keep running when storm fuel gets messy.
The L14-30R is the transfer-switch or interlock outlet. Never backfeed a dryer outlet; it can injure or kill a utility worker, damage equipment, and put live power where nobody expects it.
The WGen9500DF is the clearest example in this group: 12,500/9,500 watts on gasoline, 11,200/8,500 watts on propane, a remote-start key fob, transfer-switch-ready L14-30R 120/240V output, and a fuel gauge per Westinghouse’s published specs. That is the home-backup feature set first-time buyers should understand before they shop.
Check the Westinghouse WGen9500DF price on Amazon →
The WGen7500DF is the next useful example because it pairs 9,500/7,500 watts on gasoline with 8,550/6,750 watts on propane, a 420cc engine, a 6.6 gal tank, up to 11 hr runtime, 72 dBA noise rating, 194 lb weight, remote fob, L14-30R, GFCI household outlets, and a 3-yr warranty per Westinghouse. It shows how the same core features scale down slightly for buyers who don’t need the larger unit.
Check the Westinghouse WGen7500DF price on Amazon →
Remote start is not just comfort here. If the generator is staged outside in safe weather-protected placement, a remote fob can keep someone from dragging cords around in the dark just to get power back.
Features by buyer
Match features to the job before you compare brand names. A homeowner, RV owner, camper, and jobsite crew are usually shopping for different machines.
| Buyer | Must-have features | Example model |
|---|---|---|
| Home backup | 120/240V output, L14-30R, electric or remote start, dual fuel, fuel gauge | Westinghouse WGen9500DF |
| RV | TT-30R, manageable noise, enough running watts for the RV load | Champion 76533 |
| Camping | Low weight, quiet inverter power, CO shutoff, clean power under 3% THD | Honda EU2200i |
| Jobsite | GFCI 5-20R outlets, rugged layout, CO shutoff, enough surge for motors | DeWalt DXGNi2200 |
Two smaller reference models show why the right feature mix beats raw size.
Check the Honda EU2200i price on Amazon →
The Honda EU2200i is the clean-power camping and electronics example: 2,200/1,800 watts, 47.4 lb, 48-57 dBA, under 3% THD, CO-MINDER shutoff, and Bluetooth app monitoring per Honda.
Check the Champion 200961 price on Amazon →
The Champion 200961 is the compact dual-fuel example: 2,500/1,850 watts on gasoline, 1,665 running watts on propane, 39 lb weight, and up to 34 hr at 25% load on a 20-lb tank per Champion.
Features that are mostly marketing
Chrome trim does not make power cleaner, quieter, or safer. If the generator has the watts, outlets, CO shutoff, and start system you need, trim should not move the decision much.
Be careful with inflated peak-watt claims from no-name brands. Starting watts matter, but running watts are the number that keeps your loads alive after the first motor surge.
App dashboards are useful on some standby systems and can be handy on premium portable inverters. On many portable generators, you’ll open the app twice, then go back to checking fuel, load, and hours the old-fashioned way.
“Military grade” language is another red flag unless the spec sheet backs it up with real outlets, noise ratings, power quality, and safety features. Good generators don’t need vague slogans to explain what they do.
Bottom line
Buy the generator by use case, not by the biggest peak-watt number on the box. For home backup, prioritize 120/240V output, an L14-30R outlet, transfer-switch or interlock compatibility, electric or remote start, dual fuel, a fuel gauge, and CO shutoff.
For electronics and camping, clean inverter power under 3% THD, low noise, low weight, and CO protection matter more than huge output. For RVs and jobsites, the outlet panel usually tells the truth: TT-30R for RV use, GFCI 5-20R for corded work, and L14-30R for proper home backup.
Frequently asked questions
What features should I look for in a portable generator?
Start with honest running watts, enough starting watts for motor surge, clean power under 3% THD if you’ll run electronics, a CO shutoff, and the right outlets for your use. For home backup, look for 120/240V output, an L14-30R outlet, electric or remote start, and dual fuel.
What is THD and why does it matter?
THD means total harmonic distortion. Under 3% THD is the clean-power line for sensitive electronics like laptops, routers, TVs, and modern control boards; Honda lists the EU2200i below that mark.
Do I need a CO sensor on a generator?
Yes, on a new generator I’d treat a CO shutoff as a must-have. Honda calls it CO-MINDER, Champion calls it CO Shield, DeWalt calls it CO-Protect, Briggs & Stratton calls it CO Guard, and Generac calls it COsense, but you still need to run the generator outdoors and follow the 20-ft placement rule.
What outlet do I need to power my house?
For portable-generator home backup, look for an L14-30R 120/240V outlet used with a proper transfer switch or interlock. Never backfeed a dryer outlet; it’s dangerous and can put live power where utility workers or your own equipment don’t expect it.
Is electric start worth it?
Electric start is worth it on larger portable generators, especially for home backup. Champion’s 76533 includes electric start with a battery, while Westinghouse’s WGen9500DF and WGen7500DF add remote-start key fobs for easier storm use.
What does RV-ready mean?
RV-ready usually means the generator has a TT-30R 120V/30A outlet for an RV shore-power cord. It does not mean the generator is automatically right for home backup; that job usually calls for an L14-30R 120/240V outlet and a transfer switch or interlock.
Are dual-fuel generators worth it?
Dual-fuel generators are worth it if you want fuel flexibility during outages or storage. Gasoline is easy to find in normal conditions but untreated gas degrades in about 30 days per Honda’s guidance, while propane stores indefinitely.
