GENMAX GM10500iETC Tri-Fuel Generator, 10,500W Starting

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Product guide

GENMAX GM10500iETC Tri-Fuel Generator, 10,500W Starting

Starting: The GENMAX GM10500iETC is a tri-fuel portable generator listed for gasoline, propane, and natural gas, with remote start and multiple 120V/240V outlet options. Its substantial weight and fuel-specific output figures matter when planning a home backup setup.

At a glance

Fuel-specific output is listed as 10,500W starting and 8,500W running on gasoline, with lower figures for propane and natural gas.
The panel description lists a 50A outlet, a 30A outlet, four 20A outlets, and 120V/240V use.
Features include remote electric start, an ATS connection, CO shutoff, and low-oil shutdown.
At 304 pounds, moving or positioning it requires planning despite listed wheels and a telescoping handle.

Price

$1,954.99Save 15%

Reference price: ~~$2,299.99~~

Price checked: Nov 13, 2026

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Pros and cons

Pros

Three fuel choices can help buyers adapt to available fuel supplies.
The supplied output figures and described 50A and 30A outlets support consideration for substantial backup loads, subject to load and connection planning.
Remote electric start and listed automatic transfer switch control are useful for planned backup arrangements.
Manufacturer-described inverter output has less than 3% THD, a relevant specification when powering sensitive electronics.

Cons

Its listed 304-pound weight makes transport and placement less convenient than with lighter portable generators.
Available output depends substantially on fuel choice, with natural-gas running output listed below gasoline output.

Technical specifications

25 specifications

Identity
Brand	GENMAX
Model	GM10500iETC

Power and fuel
Power configuration	Gasoline, Propane(LPG), Natural Gas(NG)
Starting output by fuel	Starting Wattage: 10500W(GAS)/9500W(LPG)/8400W(NG)
Running output by fuel	Running Wattage: 8500W(GAS)/8000W(LPG)/6800W(NG)
Engine maximum power	10.5 KW
Tank volume	6.9 gallons
Runtime listed	14 hours

Engine and operation
Engine displacement	458 cubic centimeters
Engine type	4 Stroke
Ignition system	Electronic
Frequency	60 hertz
Remote start	Remote Electric Start
Total harmonic distortion	less than 3%

Electrical
Voltage in details	120 volts
Voltage in feature description	120V/240V
Current rating	50 A
Total power outlets	7
Control panel outlets and connections	1X 120/240V AC 30A L14-30R Outlet,DC Cigarette Lighter Outlet: 12V DC 8.3A, 1X 120/240V AC 50A 14-50R Outlet,4X120V AC 20A 5-20R Outlet

Display and features
Screen technology listed	LCD
Additional listed features	50A Plug,voltage transfer switch, ATS,CO Shutoff, Forced lubrication,Remote start, Rain cover,oil filter, Resettable Circuit Breaker,LED light, Neutral Floating, Tri-Fuel,LCD Display,Low Oil Shutdown

Dimensions and installation
Weight listed	304 pounds
Dimensions	30.9"L x 22.6"W x 29.3"H

Certification and support
Certification listed	Certification:CARB/EPA/PGMA
Warranty in details	1 year

What to know before buying

The neutral is described as floating. The listing says a separately sold bonding plug is needed to change it to bonded neutral for portable use. Confirm the configuration needed for the intended connection.
A stated 50A outlet or ATS feature does not by itself establish compatibility with a particular home transfer setup. Have the wiring and required connections checked for the intended installation. The listing says the bonding plug is sold separately.

Listing details to confirm

The listing gives 120 volts in its details but 120V/240V in feature information. It also describes 10,500W as headline output while listing distinct starting and running figures by fuel, a 14-hour runtime without a stated operating condition, and a one-year warranty in details versus a three-year warranty in feature text. Confirm the applicable voltage, output, runtime conditions, and warranty for the selected listing before planning a connection or purchase.

What’s in the box

Included

Power adapter
ATS cable (1)
Rain cover (1)
Funnel (1)
NEMA L14-30P locking plug (1)
NEMA 14-50P industrial plug (1)
Generator
Spark plug socket wrench (1)
Dual-purpose screwdriver (1)
Remote control key (1)
LPG hose (1)
NG hose (1)
NG quick connector (1)

Who is it for?

A good fit for

Home backup buyers who want gasoline, propane, and natural-gas options and have a suitable outdoor location and connection plan.
Buyers sizing a generator for high starting loads who can match their expected demand to the output listed for their chosen fuel.
Users who value remote start and a mix of 20A, 30A, and 50A outlet options.

Less suited to

Buyers who need a lightweight generator for frequent solo carrying or compact storage.
Anyone needing one output figure to apply across all fuels or assuming an unconfirmed runtime at a particular load.

GENMAX GM10500iETC Tri-Fuel Generator, 10,500W Starting · photo 2 — Additional product photo 2

Customer reviews on Amazon

4 / 5 · 262 ratings

5 stars67%67%
4 stars10%10%
3 stars3%3%
2 stars1%1%
1 star19%19%

Customer feedback highlights perceived power, quiet operation, ease of use, and build quality, including reports of running large household loads. Reliability and battery life are described as mixed, with some customers reporting trouble keeping the generator running. Those experiences matter for backup use, where the listed fuel-specific output and remote start do not guarantee dependable operation. The overall rating distribution is mixed rather than uniformly positive.

Positive themes

Customers praise perceived power and capacity, including reported use with a heat pump or central AC and well pump.
Quiet operation, ease of use, and build quality receive positive mentions.

Mixed feedback

Reliability feedback is mixed, including reports that the generator runs well and reports that it stops after a short time.
Battery-life feedback is mixed.

Frequently asked questions

What output does the GENMAX GM10500iETC list?

The listing gives fuel-specific figures: 10,500W starting and 8,500W running on gasoline, 9,500W starting and 8,000W running on propane, and 8,400W starting and 6,800W running on natural gas.

Does this generator provide 120V and 240V?

The feature description lists 120V/240V and describes simultaneous use, while the details section lists 120 volts. Because those entries differ, confirm the voltage and outlet configuration for the selected unit before purchase.

Is the generator ready to connect to a home transfer switch?

The listing describes an ATS connection and a floating neutral, but it does not establish compatibility with a particular installation. Verify the required transfer equipment and neutral configuration with a qualified installer.

How heavy is the GM10500iETC?

The listed weight is 304 pounds. The product description mentions wheels and a telescoping handle, but its weight remains important when planning placement and movement.