01
GENMAX GM10500iETC · Feature 1
Flexible fuel supply
Gasoline, Propane, Natural gas
GENMAX · TRI-FUEL
In Stock · Ships from Dallas
GENMAX GM10500iETC 10500-Watt 458cc Tri-Fuel Inverter Generator with Remote Start
$1,139.40
$2,199.00
SAVE 48% ($1,060 OFF)
Commercial Freight Surplus: Unclaimed regional contractor allocation at our Dallas, TX warehouse — factory-sealed, 0.0 runtime hours, covered by our 3-Year Commercial Warranty.
Order within -- hr -- min — dispatches today from Dallas, TX.
FREE Curbside Liftgate Delivery (3–5 business days) with live PRO tracking.
Free Liftgate Freight
3-Year Warranty
Factory Sealed · 0.0 Hrs
30-Day Money-Back
Questions on sizing or delivery? 24/7 Dallas Support:
(469) 257-1142
256-Bit SSL Encrypted Checkout
Starting watts
10,500 W
On gasoline
Running watts
8,500 W
On gasoline
Fuel
Tri-fuel
Gasoline, Propane, Natural gas
Engine
458 cc
GENMAX · Product 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.
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Remote and 2-wire start Key fob plus an ATS cable in the box.
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Hoses included Propane hose and a natural-gas hose.
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CO alert Automatic sensor.
Gasoline Output
10,500 W Starting
8,500 W Running
Highest surge capacity for central HVAC & heavy jobsite motor loads.
Propane (LPG) Output
9,500 W Starting
8,000 W Running
Shelf-stable fuel with zero carburetor gumming during storm storage.
Natural Gas (NG) Output
8,400 W Starting
6,800 W Running
Continuous residential utility-line backup with no cans or tanks to refill.
GENMAX GM10500iETC · Features & Engineering
OEM Commercial Grade
Key Features & Hardware Breakdown
02
GENMAX GM10500iETC · Feature 2
Start from the panel or remotely
Electric push-button, wireless key fob, 2-wire auto-start
03
GENMAX GM10500iETC · Feature 3
Connections for larger loads
120/240V 50A NEMA 14-50R
Engineering & Construction Highlights
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Industrial Engine Platform: 458cc 4-stroke OHV commercial power unit with proven domestic parts & filter support.
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Complete Receptacle & Transfer Array: 120/240V 50A NEMA 14-50R
GENMAX GM10500iETC · Factory Data
Need a spec verified? Ask Dallas Tech Desk →
Technical Specifications
| Specification | Rating / Value |
|---|---|
| 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 |
| Specification | Rating / Value |
|---|---|
| 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 · Crate Contents
100% Factory Sealed
What's Included in the Box
- 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
Pre-Start & Freight Delivery Note: For safe DOT carrier transport, all gas/tri-fuel engines ship dry without crankcase oil or fuel. Add the recommended 10W-30 4-stroke oil before first start, operate outdoors at least 20 ft from windows/doors, and inspect outer carton with the liftgate driver upon arrival.
Serialized Crate Paperwork
Included inside every factory crate · Tap any certificate to inspect
Official Commercial Certifications
3-Year Commercial Warranty
✓ Factory Sealed
Pre-Delivery Inspection (PDI)
✓ 0.00h Verified
EPA & CARB Compliance
✓ 50-State Certified
Depot Quality Standard
✓ Insured Dispatch
Dallas Regional Logistics
$0.00 Freight Included
Free Curbside Liftgate Delivery
Every order dispatches directly from 5800 Industrial Blvd, Dallas, TX 75207 with full commercial cargo insurance and residential hydraulic liftgate unloading included at $0 extra charge.
1
Dallas Depot PDI
Factory seal verified, pallet-strapped, and booked with regional LTL carrier within 1 business day.
2
Live PRO# Tracking
Carrier tracking link and serialized 3-Year Warranty documentation emailed immediately on pickup.
3
24-Hr Delivery Call
Destination terminal calls ahead to confirm your residential driveway or jobsite delivery window.
4
Hydraulic Liftgate Drop
Driver lowers the palletized crate smoothly to ground level — no loading dock or forklift required.
Verified Equipment Owners
✓ 100% Verified Buyers
Customer Reviews (4)
5.0
Based on 4 verified buyers
Customer Delivery & Setup Photos (1)
Mark R.
October 24, 2026 ✓ Verified Purchase · Tyler, TX
★★★★★
Runs whole house including 4-ton AC without flinching
Ordered the Genmax Gm10500Ietc 10500 Watt Tri Fuel Inverter Generator 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 fuel.
David M.
October 12, 2026 ✓ Verified Purchase · Broken Arrow, OK
★★★★★
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 fuel source, 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.
September 28, 2026 ✓ Verified Purchase · Ocala, FL
★★★★★
Fuel versatility and clean power output are a lifesaver
The fuel versatility on this Genmax Gm10500Ietc 10500 Watt Tri Fuel Inverter Generator was the main selling point for me. Being able to connect directly to propane or natural gas 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.
September 15, 2026 ✓ Verified Purchase · Marysville, OH
★★★★★
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.
Technical & Freight Desk
Questions & Answers
Need transfer-switch sizing, natural gas BTU flow, or liftgate scheduling confirmed before ordering? Talk directly with our Dallas equipment desk.
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 Free Curbside Liftgate Delivery work?
Every order ships free from our Dallas, TX regional depot (5800 Industrial Blvd). Heavy crated generators and commercial machines ship via insured LTL freight with a scheduled 24-hour advance phone call and free hydraulic liftgate lowering onto your driveway or curb.
Why is this unit discounted below standard retail?
Groundmark acquires unclaimed and over-allocated commercial contractor freight consignments directly into our Dallas warehouse. Every unit is 100% factory-sealed with 0.0 runtime hours and covered by our serialized 3-Year Commercial Warranty.
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