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Buying guide · 13 min read · Updated 2026-11-07

Best 5500 Watt RV Generators (2026)

Six 5500 watt class RV generators compared by running watts, inverter or open frame build, dual fuel behavior and the outlets that matter for a larger trailer.

James MillerBy James MillerLead Machine Editor6 machines comparedSpec-sheet verified
Best 5500 Watt RV Generators

At a glance

Our top picks

Side by side

Spec comparison

Five and a half thousand watts is the size owners reach for when a single air conditioner stops being enough. A toy hauler or a long fifth wheel often carries two compressors, and a generator in this class can run both if the starts are staggered and the rest of the load is modest.

This class also splits into two camps that behave differently on the road. Inverter machines are quieter and lighter for the output, while conventional open frame generators give more raw watts per cost and carry a heavier, louder body. Choosing between them is the first decision, and the label rarely says which camp you are in.

Before you buy

6 Criteria to Look For Before Buying a 5500 Watt RV Generator

  1. 01

    Inverter or conventional

    Inverter units like the GENMAX 5000 and WEN 6800 are quieter and produce clean power. Conventional machines like the two DuroMax models cost less per watt and run at constant speed. For electronics and RV parks choose inverter, for a work trailer choose conventional.

  2. 02

    Running watts behind 5500

    The WEN holds 5100, the GENMAX 5000, the DuroMax EH 4500 and the GENMAX dual fuel 4000. That spread of 1100 watts is the difference between two air conditioners with margin and one with a microwave. Read the running figure first. If a listing only quotes a peak number, treat that machine as the lowest figure in the range until you see the manual.

  3. 03

    Propane losses

    The WEN drops from 5100 to 4500 rated on propane. The GENMAX dual fuel's starting watts fall from 5500 to 4950. Plan boondocking loads around the propane figure.

  4. 04

    Staggering two air conditioners

    Two compressors starting at once can ask for more than 6000 watts. Staggering them by a minute, or fitting soft start kits, lets a 5000 watt generator run both. The WEN's 6800 surge helps the most. A long coach with two units often has the second compressor on a delay relay; if yours does not, add one.

  5. 05

    Carbon monoxide safety

    The WEN shuts down automatically, the GENMAX shows a warning light. A bigger engine puts out more exhaust, so keep the unit well away from the trailer and windows. A battery powered alarm inside is wise.

  6. 06

    Waveform and electronics

    A conventional generator's waveform is rougher than an inverter's. The DuroMax models need a surge protector for televisions and computers. An inverter keeps the converter happy without extra gear.

Detailed reviews

The 6 best 5500 watt rv generators, explained

01
GENMAX 5500W peak, 5000W rated inverter generator
5000W rated5500W peak3.9 gal tankTHD under 3%
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Best for: RV owners who want 5000 rated watts and a large tank in an inverter body.

Holding 5000 rated watts from an inverter body is what puts this GENMAX at the top, because the 5500 in the label is only 10 percent above the continuous figure. That honesty is rare at this size. It carries a 3.9 gallon tank, a telescoping handle, manual and electric start, and a panel with alarms for low oil, overload, fault and carbon monoxide.

For a trailer with two air conditioners the 5000 rated figure is enough if the compressors are started a minute apart, and a soft start device on each makes it comfortable. The inverter waveform keeps the converter and electronics in a modern RV happy, with distortion under 3 percent. Eco mode lowers fuel burn at light loads, such as a night with only the refrigerator running.

The CO light is a warning, not a shutoff, so the placement rule still applies. A 3.9 gallon tank is generous, but it holds a lot of gasoline that should be stabilized if the trailer sits. It is EPA compliant, which makes it usable in more states than some imports. Compared with the WEN at 5100 rated, it gives up 100 watts and the automatic shutdown but keeps a much larger tank and a lower likely price, which is why it wins on balance.

What works

  • 5000 rated watts, a small gap to the 5500 peak
  • 3.9 gallon tank for long runs
  • Low oil, overload and CO warning panel
  • Manual and electric start

Watch out for

  • CO light warns but does not shut down
  • Large tank of gasoline can go stale

Spec sheet

Rated watts
5000
Peak watts
5500
Fuel tank
3.9 gallons
Start
Manual and electric
Alerts
Low oil, overload, CO light, fault
02
DuroMax XP5500EH 5500W start, 4500W running dual fuel generator
4500W running5500W startDual fuel224cc OHV
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Best for: Owners who want a low cost dual fuel generator with electric start.

DuroMax builds this as a conventional open frame dual fuel generator, so you get 4500 running and 5500 starting watts from a 224cc engine with electric start, at a price that undercuts the inverter units. The unit can handle heavy loads according to the listing, and it runs on gasoline or propane for flexibility. There is no inverter electronics layer, so the waveform is the plain kind that many RV converters tolerate but sensitive devices may not enjoy.

It gives up 500 running watts to the GENMAX and loses the enclosed quiet that an inverter offers, but gains a simple machine that is easy to service. A conventional engine runs at constant speed, so it burns fuel steadily regardless of load, and it is louder at idle. For an RV owner who runs a generator a few hours a day and cares about cost per watt, that trade is reasonable.

Use a surge protector or an inline power conditioner for the television and any electronics that dislike a rough waveform. Check the propane hose each season, and carry a spare plug. It is a workhorse more than a camper's accessory. Where it beats the inverter models is serviceability: a plain carburetor, a simple frame and a plug you can reach make roadside repairs realistic.

What works

  • Dual fuel with electric start
  • 4500 running and 5500 starting watts
  • 224cc engine, easy to service
  • Lower cost than inverter units

Watch out for

  • Conventional waveform is rougher for electronics
  • Louder and burns fuel at constant speed

Spec sheet

Running watts
4500
Starting watts
5500
Engine
224cc OHV
Fuel
Gasoline or propane
Start
Electric
03
DuroMax XP5500HX 5500W dual fuel generator, 210cc, copper windings
5500W label210cc OHV-VCopper windingsDual fuel
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Best for: Owners who run a generator many hours a year and want copper windings.

The HX version points at longevity: a 210cc engine and an alternator wound entirely in copper, which carries current with less heat than aluminum and tends to last longer under constant loads. It runs on gasoline or propane with electric start, and the label reads 5500 watts. The excerpt does not give the running figure separately, so check the manual for it, though it should sit near the sibling EH's 4500.

Because the engine is slightly smaller than the EH's 224cc, the extra durability is in the alternator rather than the engine. If you run a generator many hours each season, copper windings are a quiet advantage. The propane option adds the usual output loss, so plan loads on the lower number.

Like the EH it is a conventional machine, so use a surge protector for electronics. It is the pick for owners who plan to run it for a long time, on a budget. Keep the oil fresh, check the propane hose and rotate the gasoline each season. Compared with the EH it is the one to pick if you see long hours ahead, while the EH has the larger engine and the known running figure.

What works

  • All copper windings in the alternator
  • Dual fuel with electric start
  • 210cc OHV-V engine
  • Conventional design that is easy to service

Watch out for

  • Running watts not stated in the excerpt
  • Plain waveform needs a protector for electronics

Spec sheet

Power label
5500 watts
Engine
210cc OHV-V
Alternator
All copper windings
Fuel
Gasoline or propane
Start
Electric
04
GENMAX GM5500XiD dual fuel generator, 5500W start, 4000W rated
4000W rated5500W startLow idleDual fuel
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Best for: Single air conditioner RVs that want fuel savings and propane flexibility.

The XiD blends inverter style speed control with an open frame body: a low idle mode slows the engine when the load drops, so a quiet night of refrigerator only running uses little fuel. It gives 5500 starting and 4000 rated watts on gasoline, and 4950 starting on propane. That 4000 figure is 1000 below the GENMAX 5000, which is the price of the dual fuel convenience and lower cost.

Compared with the DuroMax EH at 4500 running it is lighter on output but gentler on fuel, because the engine speed follows the load. The open frame is louder and exposed, so it wants a cover and some distance. The propane starting figure drops 550 watts, which will matter with a hard starting compressor.

For an RV that mostly runs one air conditioner and the refrigerator, 4000 watts is plenty, and the fuel saving adds up on long trips. Keep gasoline fresh for the days you need the full starting figure. The practical benefit shows in a long day of idle running, where a conventional unit burns a steady amount and this one sips.

What works

  • Low idle mode saves fuel at light load
  • Dual fuel with 4950 starting on propane
  • 5500 starting watts on gasoline
  • Open frame keeps cost down

Watch out for

  • 4000 rated is 1000 below the GENMAX 5000
  • Open frame is louder and exposed

Spec sheet

Gas rated watts
4000
Gas starting watts
5500
Propane starting watts
4950
Frame
Open frame, high speed engine
Mode
Low idle control
05
WEN 6800W surge, 5100W rated dual fuel inverter generator
5100W rated6800W surgeCO WatchdogDual fuel
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Best for: Owners who want the CO shutdown, high surge and propane in one machine.

Surge of 6800 watts is the highest in this guide, and it gives an air conditioner a vigorous start; with 5100 rated it is also the highest continuous figure here by a small margin over the GENMAX 5000. A CO Watchdog shuts the engine down automatically, and the bonded neutral 240 volt configuration can support slow Level 2 charging for an electric vehicle. It runs on gasoline or propane with electric start and an RV ready outlet.

On propane, rated watts fall to 4500 with 6000 surge, a loss of 600 watts, which is large enough to matter if you boondock on a cylinder. The 224cc engine is a modest size for the output, so keep oil fresh and avoid long full load runs. A fuel shutoff valve lets you run the carburetor dry for storage.

As a mainstream brand, parts are easy to find. If you value an automatic CO shutdown above all, this and its WEN siblings are the best bet in the class. Compared with the GENMAX 5000 it adds the shutdown and the surge but gives up a gallon or so of tank, so decide whether fuel hours or safety matter more.

What works

  • 6800 surge and 5100 rated watts
  • CO Watchdog automatic shutdown
  • Bonded neutral 240V for Level 2 EV charging
  • Fuel shutoff valve for storage

Watch out for

  • Propane drops to 4500 rated watts
  • 224cc engine works hard at full load

Spec sheet

Gas rated watts
5100
Gas surge watts
6800
Propane rated watts
4500
Engine
224cc dual fuel
Safety
CO Watchdog shutdown
06
ComJoy 5500W peak 120/240V inverter generator, 223cc
5500W peak223cc OHV120/240V7 port hub
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Best for: Family campers who want a large charging hub and 240 volt output.

A seven port charging hub sits beside a 30 amp outlet on this ComJoy, which also provides 120 and 240 volt output from a 223cc engine. For an RV family with phones, tablets and a laptop each, the hub keeps cords off the camp table. The telescopic handle and wheels make it a one person mover.

The listing gives a 5500 peak figure and leaves the continuous rating unstated, so ask the seller for it, since a 223cc engine behind a 5500 peak suggests something near the mid 4000s but that is only an inference. Its feature set is richer than its documentation.

A new brand means you should check the warranty and keep the receipt. Treat the hub as a convenience, and size loads from the running figure. It is the family camp pick for those who value outlets over raw output. The seven ports run off the same engine as everything else, so a full hub of chargers is still only a few dozen watts of load.

What works

  • Seven port charging hub
  • 30 amp outlet with 120/240V
  • 223cc engine
  • Telescopic handle and wheels

Watch out for

  • Running watts not stated in the excerpt
  • Newer brand with limited track record

Spec sheet

Peak watts
5500
Engine
223cc 4 stroke OHV
Voltage
120/240V
Outlets
30A plus 7 port charging hub
Handle
Telescopic

Spec sheet decoder

What the numbers on the box really mean

The specs manufacturers lead with, translated into what they tell you about real-world performance.

5500W label

A marketing figure that may be starting, peak or rated.

Watch forRated watts here run from 4000 to 5100.

Overhead valve engine

The valves sit in the cylinder head, which lets the engine breathe efficiently and run cleaner than older side valve designs. Nearly every generator in this class uses it.

Watch forThe DuroMax XP5500HX lists a 210cc OHV-V engine, and the maker does not explain the suffix, so check the manual.

Copper windings

Alternator windings of copper, which run cooler than aluminum.

Watch forThe DuroMax XP5500HX lists all copper windings.

Low idle

Engine speed drops as load falls, saving fuel and noise.

Watch forThe GENMAX GM5500XiD uses it.

Bonded neutral 240V

A wiring option that allows certain 240 volt loads such as EV charging.

Watch forThe WEN lists it.

Methodology

How We Evaluated These 5500 Watt RV Generators

Rated output

We ranked by continuous watts: 5100 on the WEN, 5000 on the GENMAX, 4500 on the DuroMax EH and 4000 on the GM5500XiD. Units without a stated figure lost points.

Build type

We separated inverter from conventional designs. Inverter units earned credit for waveform and noise. Conventional units earned credit for cost.

Fuel behavior

We compared propane losses. The WEN loses 600 rated watts on propane. The GM5500XiD loses 550 starting watts.

Safety systems

We checked for CO shutoff versus warning light. The WEN shuts down and the GENMAX warns. Neither replaces placement.

Support

We weighed brand reach and parts. WEN and DuroMax lead. Figures come from manufacturers' listings, not our measurements.

Decision guide

How to Choose the Right 5500 Watt RV Generators

By RV Setup

SituationPickWhy
Two air conditioners staggeredWEN 6800W6800 surge and 5100 rated
Large tank, long runsGENMAX 5000W3.9 gallon tank
Single air conditioner, fuel savingsGENMAX GM5500XiDLow idle mode
Cost per watt, work trailerDuroMax XP5500EHConventional with electric start
Family with many devicesComJoy 5500WSeven port hub

By Budget

Budget tierPickWhy
LowestDuroMax XP5500HXCopper windings at a low tier
Low to midGENMAX GM5500XiDDual fuel with low idle
MidDuroMax XP5500EH4500 running
Upper midGENMAX 5000WInverter with a big tank
TopWEN 6800WHighest surge and CO shutoff

Inverter vs Conventional

Inverter

The GENMAX 5000, WEN 6800 and ComJoy give clean power and lower noise. They cost more per watt.

Conventional

The DuroMax models give raw watts for less money. They are louder and need a surge protector for electronics.

Choose inverter for parks and electronics and conventional for cost.

Fuel Choice

PreferencePickWhy
Gasoline onlyGENMAX 5000WFull output on one fuel
Propane with a big surgeWEN 6800W6000 surge on propane
Propane at a low costDuroMax XP5500EHDual fuel conventional
Fuel savingsGENMAX GM5500XiDLow idle mode

For Toy Haulers and Fifth Wheels Specifically

Look for

At least 4500 running watts, a large tank and a connection plan for two air conditioners. Staggered starts are the key habit. Check the generator's receptacle against the cord you own before the trip, not at the campsite.

In this comparison

The WEN 6800 and GENMAX 5000 carry the most. The DuroMax EH is the cheaper conventional alternative.

When to Spend More

Spend more if

You want CO shutdown and 5100 rated watts. The WEN 6800 delivers them.

Save if

You want dual fuel at a low cost. The DuroMax models do it.

Ownership

Maintenance schedule

The upkeep that decides whether this machine lasts two seasons or ten.

TaskIntervalWhy it matters
Oil changeFirst 20 hours, then yearlyLarger engines heat oil under load. Fresh oil protects bearings.
Propane hoseEach seasonDual fuel models use hoses. Soapy water shows leaks.
Starter batteryMonthlyElectric start units need a charged battery. Run the engine for 15 minutes.
Air filterEvery 50 hoursConventional engines draw dust. A clogged filter fouls the plug.
Fuel stabilizerBefore storageA 3.9 gallon tank of old gasoline gums the carburetor. Stabilize or drain.

FAQ

Frequently Asked Questions

Can a 5500 watt generator run two air conditioners?

Yes if you stagger the starts by a minute or fit soft start kits on both compressors. The WEN 6800 gives the most surge at 6800 watts, and the GENMAX 5000 holds the highest continuous figure after it.

Inverter or conventional?

Inverter for quiet and clean power, conventional for cost per watt. Most RV parks prefer inverter machines because of the noise rules, and a conventional generator needs a surge protector for electronics.

Is propane worth it?

For storage and long trips, yes. The WEN loses about 600 rated watts.

Do I need a surge protector?

With conventional machines like the DuroMax, yes, for electronics.

Is 240 volt needed?

Only for certain loads. Most RVs run on 120 volts.

How heavy is this class?

Heavy, so plan a cart or a hitch carrier. Weights are rarely stated in the listings for this class, and a unit that powers two air conditioners is not something to lift into a bumper bay by hand.

Bottom line

The short version

Browse more 5500 watt rv generatorson Amazon →
James Miller, Lead Machine Editor

About the author

James Miller

Lead Machine Editor, MachineFanatic

James Miller leads MachineFanatic's buying guides, turning spec sheets, manuals and owner feedback into clear verdicts on power tools, outdoor power equipment, shop machines and kitchen machines.

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