GENMAX · Inverter generator

GM4000iSAPC

Gasoline inverter generator with 4,000 peak watts

3,200W running4,000W peak145cc OHVGasoline

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GENMAX GM4000iSAPC 4000 Watt Gasoline Inverter Generator with CO Detect — Official product image: GENMAX

Visual spec gallery

The deciding numbers, made scannable.

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01 · Maximum output

4,000W peak

Continuous output3,200W running

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

02 · Fuel output

Gasoline

3,200W run · 4,000W peak

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

03 · Portability

48.5Lbs

Unit weight

19.1x11.2x17.9 in

Dimensions

Sound rating

See manufacturer page

04 · Controls & ownership

Starting

Electric

CO shutoff

Manufacturer-listed

Parallel

Capable

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

3,200 running watts and 4,000 peak watts for rv power and home essentials. Confirm exact configuration and included accessories with the seller before purchase.

Fuel-specific output

Gasoline: 3,200W running / 4,000W peak

Operation & ownership

Engine: 145cc OHV
Voltage / frequency: 120v / 60Hz
Runtime: See manufacturer page
Fuel capacity: 0.9Gal
Sound: See manufacturer page
Starting methods: Electric
Unit size / weight: 19.1x11.2x17.9 in / 48.5Lbs
Warranty: 3year

Connections

See manufacturer page

Manufacturer feature details

EXTREMELY QUIET: Full enclosed design dramatically reduces noise levels.

LIGHTWEIGHT DESIGN: A lot of power for alightweight generator.

240V READY: (120v+120v=240v，3000w+3000w=6000w，TWO UNITS SERIES CONNECTIONG : 240v 6000W running watts . ) Use special series-parallel box to combine 2 generators convert into 240V generator.

DIGITAL CONTROL CENTER: The Digital Control Center features an LCD display showing hours run, voltage output, and load level.

CLEAN ELECTRICITY: Provides clean, stable power ideal for sensitive electronics, tools and appliances.

Show the full manufacturer specification table

AC Voltage: 120V
Power Factor: 1.0
Current: 26.7A
Insulation Class: F
Frequency: 60Hz
Rated Amb. Temp.: 25C
Max.Power: 4.0kW
Fuel Capacity: 0.9Gal
Rated Power: 3.2kW
Engine: 145cc
Phase: Single
Net Weight: 48.5Lbs
RPM: 4850
Dimensions: 19.1x11.2x17.9 in
Warranty Description: 3year

Current seller links

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

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Best-fit uses

RV power
Home essentials
Tailgating
Jobsite tools

Standout features

3,200 running / 4,000 peak watts
Gasoline
Electric start
CO shutdown system

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Official sources:Model page User manual All GENMAX generatorsVerified September 15, 2026