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GENMAX GM10500iETC 10500-Watt 458cc Tri-Fuel Inverter Generator with Remote Start, photo 1 of 5

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Inverter generator · tri-fuel In stock · ships from Dallas

GENMAX GM10500iETC 10500-Watt 458cc Tri-Fuel Inverter Generator with Remote Start

10,500-watt tri-fuel inverter with a 458cc engine, a 6.9-gallon tank, remote start, and a 50A outlet.

5.0 (4 reviews)

$1,139.40 $2,199.00 SAVE $1,059.60 (48% OFF)

In stock · ready to ship Ships tomorrow Order today and it leaves our Dallas, TX warehouse tomorrow.

Tracking number sent by email as soon as the freight carrier picks up your order.

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3-year warranty
30-day returns
Free delivery

Starting watts

10,500 W

On gasoline

Running watts

8,500 W

On gasoline

Fuel

Tri-fuel

Gasoline, Propane, Natural gas

Engine

458 cc

Overview

Three fuels, with a 50A outlet.

The GM10500iETC uses a 458cc engine and a 6.9-gallon tank in a 30.9 by 22.6 by 29.3 inch cabinet. GENMAX rates it at 10,500 starting and 8,500 running watts on gasoline, 9,500 and 8,000 on propane, and 8,400 and 6,800 on natural gas. It starts from the button, a key fob, or a 2-wire auto-start connection, and the box includes LPG and natural-gas hoses, an ATS cable, and a rain cover. Listed noise is 62 dBA at 23 feet.

Remote and 2-wire start Key fob plus an ATS cable in the box.
Hoses included Propane hose and a natural-gas hose.
CO alert Automatic sensor.

GENMAX GM10500iETC · Feature 1

Flexible fuel supply

Gasoline, Propane, Natural gas

GENMAX GM10500iETC · Feature 2

Start from the panel or remotely

Electric push-button, wireless key fob, 2-wire auto-start

GENMAX GM10500iETC · Feature 3

Connections for larger loads

120/240V 50A NEMA 14-50R

GENMAX GM10500iETC

Specifications

Figures for this model. If you need a detail that isn’t listed, ask us and we’ll check before you order.

Ask about this model

Model	GENMAX GM10500iETC
Type	Inverter generator
Fuel	Gasoline, Propane, Natural gas
Starting watts	10,500 W gasoline / 9,500 W propane / 8,400 W natural gas
Running watts	8,500 W gasoline / 8,000 W propane / 6,800 W natural gas
Engine	458cc 4-stroke OHV
Fuel tank	6.9 gal
Dimensions	30.9 × 22.6 × 29.3 in
Weight	About 253 lb
Output	Inverter, under 3% THD
Noise	62 dBA at 23 ft
Outlets	120/240V 50A NEMA 14-50R
Starting	Electric push-button, wireless key fob, 2-wire auto-start
Safety	Low-oil shutoff, CO alert
Compliance	EPA and CARB

GENMAX GM10500iETC

What’s included

These come with the machine.

✓ Remote key
✓ LPG hose
✓ Natural-gas hose and quick connector
✓ ATS cable
✓ Battery charger
✓ Rain cover
✓ 14-50P plug
✓ L14-30P plug
✓ Spark-plug wrench
✓ Funnel
✓ Screwdriver

Customer reviews

Reviews from GENMAX GM10500iETC owners.

5.0

Based on 4 reviews

100% (4)

0% (0)

Customer photos (3)

Mark R.

Runs whole house including 4-ton AC without flinching

David M.

Clean freight delivery and great build quality

Travis H.

Fuel versatility is a complete lifesaver

Mark R.

Tyler, TX

October 24, 2026

★★★★★

Runs whole house including 4-ton AC without flinching

Ordered the GENMAX GM10500iETC 10500-Watt 458cc Tri-Fuel Inverter Generator with Remote Start after getting tired of sitting in the dark during Gulf storms. Freight delivery arrived on a liftgate truck right onto my concrete driveway. Hooked it into our manual transfer switch with a 50A cord and ran our central 4-ton AC, two refrigerators, well pump, and all household lights. Electric start fired right up on propane.

David M.

Broken Arrow, OK

October 12, 2026

★★★★★

Clean freight delivery and great build quality

Driver called me 24 hours ahead of time to coordinate delivery. Unit was bolted onto a heavy pallet and wrapped securely. Added oil, connected a 100-lb propane tank, and pushed the start button. Purrs like a kitten and the digital meter makes monitoring voltage and hours simple. Couldn't ask for a better machine at this price point.

Travis H.

Ocala, FL

September 28, 2026

★★★★★

Fuel versatility is a complete lifesaver

The tri-fuel capability was the main selling point for me. Being able to connect directly to our residential natural gas line means no more storing 50 gallons of stale gasoline in the garage. Build quality is solid industrial grade and the frame feels bulletproof.

Gary W.

Marysville, OH

September 15, 2026

★★★★★

Remote start key fob works from inside the house

Tested the wireless remote start from about 80 feet away through the back patio door—started immediately. It is surprisingly quiet for an engine of this displacement. Very impressed with the packaging and complete hardware kit included.

GENMAX GM10500iETC

Questions and answers

Can’t find what you need? Send us a message and we’ll get back to you.

What fuels does the GM10500iETC run on?

It runs on gasoline (10,500 W starting, 8,500 W running), propane (9,500 W starting, 8,000 W running), and natural gas (8,400 W starting, 6,800 W running).

Can it back up my house?

The 50A 120/240V outlet is the connection normally used with a home transfer switch or interlock kit. Have a licensed electrician size and install that connection.

How loud is it?

GENMAX lists 62 dBA measured at 23 feet.

How does delivery work?

Delivery is free to residential addresses. Orders ship from our Dallas, TX warehouse, and larger items arrive by freight with a liftgate drop at your curb or driveway. You get a tracking number by email as soon as the carrier picks up your order.