Genmax GM3500Xi - 3200/3500W Open Frame Inverter Generator

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Genmax GM3500XiGenmax GM3500XiGenmax GM3500XiGenmax GM3500Xi
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Zoom on the Genmax GM3500Xi

In summary, the Genmax GM3500Xi is a compact and lightweight portable inverter generator especially useful for:

  • RV travellers wishing to enhance their freedom and nomad lifestyle
  • Occasional participants of outdoor events, competitions, concerts and festivals
  • DIYers who wish to improve their efficiency with tools
  • Homeowners who want to be able to use the most necessary devices in their household, even during a blackout
  • Camping and tailgating buffs looking to enhance their experience

In the sections ahead, the power characteristics, availability of various outlets, the portability, and any additional features of the device shall be discussed.

Power & Run Time

The Genmax GM3500Xi in use

The Genmax GM3500Xi

The Genmax GM3500Xi is powered by a 145 cc (5.2 hp) Dinking OHV 4-stroke engine. It delivers 120V, runs on gasoline and offers a running wattage of 3,200W as well as a peak wattage of 3,500W. In addition, the device is parallel capable (parallel kit not included) and thus, can be linked to a similar or compatible unit for added power.

With a noise rating of 66 dBA (less noisy than a normal conversation), the inverter generator's starting mechanism is centered around a standard recoil pull-rope starting mechanism.

The GM3500Xi's fuel tank, boasting 2.24 gallons, allows it to operate for around 8.5 hours at 50% load with a full tank (with an estimated fuel consumption of 0.26 GPH).

As the GM3500Xi produces a clean sine wave, with a <5% Total Harmonic Distortion (THD), sensitive electronics may be plugged in the AC outlets safely.


The control panel includes the following 3 AC outlets:

Duplex 120V 20A (5-20R)
120V 30A (L5-30R) receptacle

Furthermore, it showcases 2 DC outlets: there's two 5V USB ports (USB-A) ideal for charging various electronic devices such as smartphones and tablets.

This Genmax generator isn't quite RV Ready, but it features an L5-30R receptacle, allowing a simple RV connection through an L5-30P to TT-30R adaptor.


With dimensions of L18.9 x W13.6 x H17.7 in, the traditional open frame design of the Genmax GM3500Xi ensures stability while allowing easy maintenance access to components and promoting effective air cooling. The device has been designed for tough environments and demanding outdoor use.

With a dry weight of 57.3 lbs, the GM3500Xi is convenient, ensuring it can be taken wherever power is needed. Furthermore, thanks to its open frame, the generator is easily grabbed and moved to a new location.


Panel of the Genmax GM3500Xi

The GM3500Xi's control panel

Designed with a digital data center, the control panel of the GM3500Xi grants you access to crucial data on the lifetime run hours, ensuring practical monitoring of its status and activity.

In addition to this info, light indicators on the device will notify you if the generator is on overload, its oil levels are insufficient and the generator is ready.

From a security standpoint, the generator is furnished with an automatic low oil shut-off and an overload protection (circuit breaker), ensuring peace of mind during operation.

It also benefits from Genmax's CO DETECT technology, which is designed to monitor the level of carbon monoxide present during the generator's operation. If the generator is positioned incorrectly and carbon monoxide levels rise to an unsafe level, the generator will automatically shut down.

Along the basic documentation and an owner's manual (opens in a new tab), useful for starting the generator right away, the Genmax GM3500Xi's package also includes these accessories: tool kit and funnel.

Product Videos

The Genmax GM3500Xi versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Genmax GM3500Xi compare to inverter generators of similar power (between 2500 and 3500 W).

  • Concerning weight, the Genmax GM3500Xi weighs only just 57.3 pounds, distinguishing itself as one of the lighter inverter generators amidst the 2500 to 3500 rated wattage range. If you are mindful of weight, the Pulsar PGD40iSCO is among the top contenders in this power range, with a dry weight of 46 pounds.
  • When comparing it to devices with a similar running wattage, this inverter generator's lowest noise level of 66 dBA puts it alongside the noisier units. If you'd like a less noisy alternative, the Honda EU3000iS is a strong contender. It boasts a noise rating of 50 dBA, placing it among the quietest generators in its power category.
  • At a 50% load, the GM3500Xi's around 8.5 hours of runtime on a full tank fall within the average autonomy range for similarly powerful inverter generators. If runtime is a priority for you, the Ryobi RYi4022X stands out as one of the generators with the longest run time in its power range, providing around 12 hours of continuous use.
  • Even though run times are undoubtedly important, they are dependent on the fuel capacity to a large extent. For a more wholesome picture, we must take into consideration the fuel consumption of the generator. This inverter generator, with an estimated fuel consumption of just 0.26 GPH (gallon per hour) at 50% load, is one of the more fuel-efficient generators, for the previously mentioned wattage range. If fuel consumption is your top priority, we suggest to check out the Pulsar PGD40iSCO, which has a fuel consumption of only 0.22 GPH and thus, is one of the most efficient devices in our database.

Price comparison

As you can see from these interactive charts, when compared to other 2500-3500W inverter generators, the Genmax GM3500Xi is on the cheap side of the price range.

It can therefore be a really good buy if you're looking to acquire a budget generator.

The bottom line

  • Inexpensive
  • CO DETECT technology
  • Several accessories included
  • Parallel capable
  • Inverter
  • Lightweight (57.3 lbs)
  • Fuel efficient
  • Decent run time
  • No electric start
  • 1-year warranty
  • On the noisy side (66 dBA)

Do you own the Genmax GM3500Xi and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

Parallel capableYes, cable not included
RV readyNo
Engine145 cc Dinking OHV 4-stroke
Starting systemRecoil
Warranty1 year
VoltageAC: 120V 60 Hz, DC: 5V
Running watts3,200 W
Starting watts3,500 W
Running amps26.7 amps
Peak amps29.2 amps
Run time @50% load8.5 h
Run time @25% loadUnknown
GFCI outletsNo
Covered outletsYes
Automatic Voltage RegulationInverter
AC outlets
  • 1x Duplex 120V 20A (5-20R)
  • 1x 120V 30A (L5-30R)
DC outlets2x 5V USB port (USB-A)
Data centerLifetime run hours
IndicatorsLow oil, overload and output ready
Fuel tankSteel, 2.24 gal
Fuel gaugeNo
Weight57.3 lbs
Approx. dimensions (L x W x H)18.9 x 13.6 x 17.7 in
Noise (lower limit)66 dBA
THD< 5%
ComplianceEPA, ANSI/PGMA G300-2023
SecurityLow oil and overload protection, CO monitoring
Spark arrestorYes
NeutralBonded to frame
Accessories includedFunnel and tool kit
Country of originChina

Unlike many websites, we did our best to research each of the specs above. That being said, we are not immune to making the occasional mistake or omission. Should you notice any missing or incorrect values, don't hesitate to suggest improvements so we can address the issue.

Spec Improvement×

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About Genmax

GENMAX is a new portable generator brand registered by the Chongqing Dinking Power Machinery Co. LTD., which itself was founded in 2010 and is currently located in Chongqing, China. Dinking specializes in the general motor industry and manufactures portable generators, power sources, water pumps, garden machinery and construction machinery for foreign markets. Among most notable achievements are Dinking’s exclusive contract with Hyundai and 5th place in the ranking of Chinese foreign trade exporters in general motor industry (2016). GENMAX brand portfolio includes a sizeable selection of gas-powered generators covering all common wattage categories.

Warranty Information

The Genmax GM3500Xi is covered under a warranty for up to 1 year. This warranty may be limited and may not cover all parts of the generator.
For more information about the warranty of Genmax generators, please contact the Genmax Customer Support: 1-866-960-2920.

Questions & Answers

What can it power?
Examples of items that can be simultaneously powered.
The examples below are based on a maximum load of 80% and estimated wattages. For a more accurate estimation, use our wattage calculator.
ItemRunning WattsStarting Watts
At homeDish washer15003000
Refrigerator (energy star)1921192
Slow cooker270270
Cell phone charger2020
Total1982 W3482 W
For campingRV AC (11,000 BTU)10101600
RV refrigerator180600
Radiant heater13001300
Set of 5 LED light bulbs5555
Total2545 W3135 W
For workGrinder14002500
Reciprocating saw730960
Electric fence (25 miles)250250
Total2380 W3480 W

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Genmax GM3500Xi
2 Total Score
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User Reviews

  1. 1

    This unit would be nice if they used better quality parts, had parts and service available in the USA. It had wiring routing problems, and inverter cover that was pinched where it splits, not easy to get to the spark plug, and carburetor vent hoses that were cut off at the carburetor upon opening. I just can’t recommend this generator.

    + PROS:
    • Compact, easy to change oil, fairly quiet,
    - CONS:
    • No parts or service available in USA, have to pull gas tank to get to spark plug, cheap parts used, wiring routed poorly.
    Helpful(0) Unhelpful(0)You have already voted this

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