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Genmax GM1200i - 1000/1200W Inverter Generator

The Genmax GM1200i is a quiet, compact and lightweight inverter generator with a rated wattage of 1,000 W and a starting wattage of 1,200 W. (Read full specs)

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Description

Zoom on the Genmax GM1200i

In a nutshell, the Genmax GM1200i is a quiet, compact and lightweight portable inverter generator mostly geared towards:

  • Tailgating and campground aficionados with the desire of enjoying power anywhere they go
  • DIYers who wish to improve their efficiency with tools

In the forthcoming sections, you'll delve into its power characteristics, the various outlets it offers, its overall portability, and the additional features it boasts.

Power & Run Time

The Genmax GM1200i in use

The Genmax GM1200i

The Genmax GM1200i is powered by a 57 cc Dinking OHV 4-stroke engine. It delivers 120V, runs on gasoline and offers a running wattage of 1,000W as well as a peak wattage of 1,200W. In addition, the device is parallel capable (parallel kit included) and thus, can be linked to a similar or compatible unit for added power.

Rated for 58 dBA (less noisy than rainfall), the inverter generator's starting mechanism relies on a conventional pull-start mechanism.

The GM1200i can operate for up to 10 hours with a full tank (fuel consumption around 0.07 GPH), due to its fuel capacity of 0.7 gallon.

The GM1200i generates a clean sine wave: providing <3% Total Harmonic Distortion (THD), delicate electronics can be plugged in its AC outlets safely.

Outlets

The control panel provides the upcoming 2 AC outlets:

Duplex 120V 20A (5-20R)

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

Portability

As an inverter generator, the Genmax GM1200i showcases a closed design (L16.5 x W9.5 x H15.7 in), enhancing aesthetics and ensuring quieter operation compared to conventional, open frame models. This type of design is the most modern and convenient way to recreationally generate power.

Considered a lightweight portable generator, the GM1200i weighs just 25.3 lbs. The product’s power can be enjoyed on-the-go, as it can be moved by a single person without trouble. It can also be carried without effort with a featured handle (molded in the case), further improving its convenience.

Good to know: This unit ranks 4th in our list of the 10 smallest portable generators.

Features

Panel of the Genmax GM1200i

The GM1200i's control panel

Light indicators on the device will notify you if the generator is overloaded, the oil level is too low and the generator is ready.

Regarding security, the generator comes with an overload protection (circuit breaker) and an automatic low oil shut-off, providing 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 GM1200i's package also includes these accessories: RV adapter, tool kit and funnel.

Product Videos

The Genmax GM1200i versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Genmax GM1200i compare to inverter generators of similar power (between 1000 and 2000 W).

  • Considering its weight, the Genmax GM1200i registers at a modest 25.3 pounds, placing it among the lighter inverter generators in the 1000 to 2000 rated wattage selection. If weight is your top priority, one of the champions in this power category is the Pulsar PGD16iSCO, weighing just 24 pounds.
  • This inverter generator, with its lowest noise level at 58 dBA, is noisier than most generators of comparable running wattage. If noise is a concern for you, you could consider the Honda EU2200i, which is one of the least noisy generators in its power range, rated at 48 dBA.
  • The GM1200i, offering a run time of up to 10 hours with a full tank at a 25% load, falls within the average autonomy range when compared to its peers. If you consider autonomy on a single full tank as one of the deciding factors, one of the generators in the same power range that offers the highest run time is the DuroMax XP2300iH, with up to 13 hours.
  • Run time is a key metric, but it's dependent on the generator's fuel capacity. Therefore, discussing fuel efficiency is necessary to get the full picture. With a fuel consumption rate around 0.07 GPH (gallon per hour) at 25% load, this inverter generator is one of the most fuel-efficient models within the aforementioned wattage range.

Price comparison

As you can see from these interactive charts, when compared to other 1000-2000W inverter generators, the Genmax GM1200i 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

STRENGTHS:
  • Inexpensive
  • CO DETECT technology
  • Several accessories included
  • Parallel kit included
  • Inverter
  • Lightweight (25.3 lbs)
  • Fuel efficient
AVERAGE SPECS:
  • Quiet, but noisy for its type (58 dBA)
  • Decent run time
WEAKNESSES:
  • No data center
  • 1-year warranty

Do you own the Genmax GM1200i and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

General
InverterYes
Parallel capableYes
RV readyNo
FuelGasoline
Engine57 cc Dinking OHV 4-stroke
Starting systemRecoil
Warranty1 year
Power
VoltageAC: 120V 60 Hz, DC: 5V
Running watts1,000 W
Starting watts1,200 W
Running amps8.3 amps
Peak amps10 amps
Run time @50% load6.5 h
Run time @25% load10 h
Features
GFCI outletsNo
Covered outletsYes
Automatic Voltage RegulationInverter
AC outlets1x Duplex 120V 20A (5-20R)
DC outlets2x 5V USB port (USB-A)
Data centerNo
IndicatorsLow oil, overload and output ready
Fuel tankPlastic, 0.7 gal
Fuel gaugeNo
Misc
Weight25.3 lbs
Approx. dimensions (L x W x H)16.5 x 9.5 x 15.7 in
Noise (lower limit)58 dBA
THD< 3%
ComplianceEPA, ANSI/PGMA G300-2023
SecurityLow oil and overload protection, CO monitoring
Spark arrestorYes
NeutralFloating
Accessories includedFunnel, tool kit, RV adapter, and parallel cables
Country of originChina
UPC768494055271

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.

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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 GM1200i 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 generator sizing calculator.
ItemRunning WattsStarting Watts
At homeRefrigerator (energy star)1921192
Total192 W1192 W
For campingRV refrigerator180600
Blender400850
Game console150150
Total730 W1180 W
For workReciprocating saw730960
Total730 W960 W

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