01
Feature 01
Gasoline power
4,500 starting watts and 4,000 running watts on gasoline.
GENMAX DUAL-FUEL
In Stock · Dallas Depot
GENMAX GM4500iSAD 4500W Peak Dual-Fuel Silent Inverter Generator
$539.40
$1,099.00
SAVE 51% ($560 OFF)
Commercial Surplus
✓ 0.0 Hrs · Factory Sealed
Unopened Dallas contractor crate backed by our 3-Year Warranty.
Ships Today, Thu, Nov 12
Order in 5h 13m
Free Liftgate Delivery: Tue, Nov 17 – Thu, Nov 19
Free Liftgate
3-Year Warranty
0.0-Hr Sealed
30-Day Returns
Starting watts
4,500 W
On gasoline
Running watts
4,000 W
On gasoline
Fuel
Dual fuel
Gasoline, Propane
Weight
49.2 lb
GENMAX · Product Overview
Small enough to lift into a car.
GENMAX lists the GM4500iSAD at 49.2 lb, with a 145cc engine. It makes 4,500 starting and 4,000 running watts on gasoline, and 4,000 starting and 3,600 running watts on propane.
-
49.2 lb Published unit weight.
-
CO sensor Built in.
-
LPG hose included Plus the usual tool kit.
Gasoline Output
4,500 W Starting
4,000 W Running
Peak surge power for heavy appliances, well pumps & power tools.
Propane (LPG) Output
4,000 W Starting
3,600 W Running
Connects directly to standard 20 lb, 40 lb, or 100 lb LPG cylinders.
Transfer Switch Ready
120 / 240V AC
Home & RV Backup Output
Clean regulated output for home interlocks, RV hookups & jobsites.
Hardware Breakdown
OEM Commercial Grade
Key Features
02
Feature 02
Propane power
4,000 starting watts and 3,600 running watts on propane.
03
Feature 03
Compact cabinet dimensions
19.1 × 11.2 × 17.9 in
Core Engineering Highlights
-
Industrial Engine: 145cc 4-stroke OHV with domestic parts support.
Factory Data
Ask Dallas Tech Desk →
Technical Specifications
| Specification | Factory Rating |
|---|---|
| Model | GENMAX GM4500iSAD |
| Type | Inverter generator |
| Fuel | Gasoline, Propane |
| Starting watts | 4,500 W gasoline / 4,000 W propane |
| Running watts | 4,000 W gasoline / 3,600 W propane |
| Engine | 145cc 4-stroke OHV |
| Specification | Factory Rating |
|---|---|
| Weight | 49.2 lb |
| Dimensions | 19.1 × 11.2 × 17.9 in |
| Safety | CO sensor |
| Compliance | EPA |
| Warranty | 3-year limited, per GENMAX |
GENMAX GM4500iSAD · Crate Contents
100% Factory Sealed
What's Included in the Box
- LPG hose
- Oil funnel
- Spark-plug socket wrench
- Screwdriver
- USB-A and USB-C adapter
Pre-Start Note: Ships dry per DOT rules — add recommended 10W-30 4-stroke oil before first start and operate outdoors 20+ ft from openings.
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 Logistics
$0.00 Freight Included
Free Curbside Liftgate Delivery
Ships insured from 5800 Industrial Blvd, Dallas, TX with free hydraulic liftgate unloading at your driveway.
1
Dallas Depot PDI
Seal verified, pallet-strapped, and dispatched within 1 business day.
2
Live PRO# Tracking
Carrier tracking link and warranty papers emailed on pickup.
3
24-Hr Advance Call
Local terminal calls ahead to schedule your delivery window.
4
Liftgate Unloading
Lowered smoothly to ground level — no dock or forklift needed.
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 Gm4500Isad 4500W Peak Dual Fuel Silent 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 Gm4500Isad 4500W Peak Dual Fuel Silent 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 GM4500iSAD run on?
It runs on gasoline (4,500 W starting, 4,000 W running) and propane (4,000 W starting, 3,600 W running).
How much does it weigh?
GENMAX lists the unit weight at 49.2 lb.
How does Free Curbside Liftgate Delivery work?
Ships free from our Dallas depot (5800 Industrial Blvd) via insured LTL freight with a 24-hour advance call and hydraulic liftgate lowering to your driveway.
Why is this unit discounted below standard retail?
We acquire unclaimed contractor freight allocations directly into our Dallas warehouse. Every unit is 100% factory-sealed (0.0 hrs) with our serialized 3-Year Warranty.
Related Commercial Equipment
SAVE 51%
DUAL-FUEL
GENMAX
GENMAX GM3500iAED 3500-Watt Dual-Fuel Inverter Generator with CO Detect
$419.40
$849.00
✓ FREE Shipping
SAVE 58%
TRI-FUEL
PREDATOR
Predator 13,000 Watt Tri-Fuel Portable Generator with Remote Start and CO SECURE® Technology
$499.00
$1,199.00
✓ FREE Shipping
SAVE 54%
DUAL-FUEL
DUROMAX
DuroMax XP13000EH 10500W/13000W Electric Start Dual Fuel Generator New
$399.00
$873.00
✓ FREE Shipping
SAVE 36%
DUAL-FUEL
FIRMAN
FIRMAN WH03242 Dual Fuel Gas Propane Inverter Generator 3200W/4000W 30 Amp with Electric Start
$448.00
$699.00
✓ FREE Shipping