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GENMAX · Inverter generator

GM4500iSAD

Gasoline + Propane inverter generator with 4,500 peak watts

4,000W running4,500W peak145cc OHVGasoline + Propane
Compare retailer offers Retail pricing varies
GENMAX GM4500iSAD 4500W Peak Dual-Fuel Silent Inverter Generator (2026 Model) - Ultra-Lightweight with CO Detector, EPA Compliant
Official product image: GENMAX

Visual spec gallery

The deciding numbers, made scannable.

01 · Maximum output

4,500W peak

Continuous output4,000W running

Size around running load first, then confirm the peak rating covers the largest startup surge.

02 · Fuel output

Gasoline + Propane

Gasoline

4,000W run · 4,500W peak

Propane

3,600W run · 4,000W peak

Alternative-fuel ratings are shown only when GENMAX publishes a fuel-specific figure.

03 · Portability

49.2 Pounds

Unit weight

19.1"L x 11.2"W x 17.9"H

Dimensions

Sound rating

62 dBA

04 · Controls & ownership

Starting

See manufacturer page

CO shutoff

Manufacturer-listed

Parallel

Not listed

Warranty

3year

Official product gallery

Every manufacturer view in one place.

GENMAX imagery can include the enclosure, control panel, outlets, dimensions, feature callouts, and included accessories.

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Complete specifications

Manufacturer data, organized for comparison.

Power ratings, features, imagery, manuals, and seller links come from GENMAX’s current U.S. model page. A missing figure is labeled instead of estimated.

Never run a portable generator indoors. Keep it at least 20 feet from occupied buildings with exhaust directed away from doors, windows, and vents. Use a qualified electrician and approved transfer equipment for home connections.

Model overview

4,000 running watts and 4,500 peak watts for rv power and home essentials. Confirm exact configuration and included accessories with the seller before purchase.

Fuel-specific output

Gasoline
4,000W running / 4,500W peak
Propane
3,600W running / 4,000W peak

Operation & ownership

Engine
145cc OHV
Voltage / frequency
120V / 60 Hz
Runtime
See manufacturer page
Fuel capacity
See manufacturer page
Sound
62 dBA
Starting methods
See manufacturer page
Unit size / weight
19.1"L x 11.2"W x 17.9"H / 49.2 Pounds
Warranty
3year

Connections

【Multi functional power outlets】Equipped with 1×120V AC TT-30R RV-ready outlet, 1×duplex 120V AC 5-20R household outlets, 1×12V cigarette lighter port, and 1×USB-C & USB-A adapter. Charge all your essential devices simultaneously without overloading.

Manufacturer feature details

【DUAL FUEL Flexibility】Powered by a 145cc 4-stroke OHV high-speed engine, this generator delivers 4500 peak watts / 4000 rated watts (gasoline) and 4000 peak watts / 3600 running watts (propane). Switch fuels on demand to avoid power downtime—perfect for home backup during outages, jobsite power supply, or RV/camping trips.
【Clean & Stable Inverter Power】Delivers ≤3% Total Harmonic Distortion (THD) pure sine wave power, safe for sensitive electronics like laptops, phones, and medical equipment, Perfect for modern digital lifestyles.
【EASY TO CARRY AND USE】Weighs only 51.4 pounds with a lightweight, compact design—effortless to transport and store, making it your perfect on-the-go power partner.
【Ultra-Quiet & High-Efficient Operation】Runs as quiet as a normal conversation at 62 dB(A) (25% load), ideal for noise-restricted areas like campgrounds, residential neighborhoods, and RV parks. Features a Low Idle Mode to maximize fuel efficiency and extend runtime.
【Multi functional power outlets】Equipped with 1×120V AC TT-30R RV-ready outlet, 1×duplex 120V AC 5-20R household outlets, 1×12V cigarette lighter port, and 1×USB-C & USB-A adapter. Charge all your essential devices simultaneously without overloading.
【GENMAX SUPPORT】 Includes a 3-Year Limited Warranty + ongoing technical support—we’ve got you covered for any product issues or usage questions.
Show the full manufacturer specification table
Brand
GENMAX
Product Dimensions
19.1"L x 11.2"W x 17.9"H
Wattage
4500 watts
Model Name
GM4500iSAD
Fuel Type
Dual Fuel
Engine Power Maximum
4.5 Kilowatts
Power Source
Fuel Powered
UPC
760790722659
Item Weight
49.2 Pounds
Manufacturer
GENMAX
Output Wattage
3800
Item Weight
49.2 pounds
Special Feature
CO Sensor
ASIN
B0FR4VSRD4
Included Components
Cigarette Lighter to USB-C&A Adapter (1), Dual-Purpose Screwdriver (1), LPG Hose (1), Oil Funnel (1), Spark Plug Socket Wrench (1)
Item model number
GM4500iSAD
Warranty Description
3year

Current seller links

Compare offers from GENMAX-listed retailers.

These destinations are supplied on the official model page. Prices and availability can change.

AMAZON

Best-fit uses

  • RV power
  • Home essentials
  • Tailgating
  • Jobsite tools

Standout features

  • 4,000 running / 4,500 peak watts
  • Gasoline + Propane
  • Manual start
  • CO shutdown system

Compare it with your actual load.

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Official sources:Model pageAll GENMAX generatorsVerified September 15, 2026