GENMAX · Inverter generator

GM4000iA

Gasoline inverter generator with 4,000 peak watts

3,200W running4,000W peak145cc OHVGasoline

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GENMAX GM4000iA 4000 Watt Recoil Start Gasoline Powered Inverter Generator — 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

See manufacturer page

Unit weight

See manufacturer page

Dimensions

Sound rating

62 dBA

04 · Controls & ownership

Starting

Recoil

CO shutoff

Manufacturer-listed

Parallel

Not listed

Warranty

See manufacturer warranty

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: See manufacturer page / 60 Hz
Runtime: See manufacturer page
Fuel capacity: See manufacturer page
Sound: 62 dBA
Starting methods: Recoil
Unit size / weight: See manufacturer page / See manufacturer page
Warranty: See manufacturer warranty

Connections

Easy To Use Control Panel: Control panel consists of CO sensor indicator light, automotive inspired digital data center display, 1x duplex 5-20R 20 Amp 120-Volt, 1x L5-30R 30 Amp 120-Volt 1x USB-A, 1x USB-C

Manufacturer feature details

Robust Engine: 145cc OHV high performance 4 cycle engine, fuel-efficient, reliable, powerful providing long life and excellent heat dissipation

High Output: This portable generator features 4,000 starting watts with 3,200 running watt, at only 62dB this powerful portable inverter generator is the ideal product for your tailgating and camping needs

Low Idle With Portability: This portable inverter generator is light-weight for easy transport includes telescopic wheels and handle, weighs less than 50 lbs. low idle technology gives you a run time of 5.5-hours at 50% load with 1.5 Gal. fuel tank

Compliance with latest standards: in compliance with PGMA, UL2201 and CARB 2024

Current seller links

Compare offers from GENMAX-listed retailers.

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

Home Depot

Best-fit uses

RV power
Home essentials
Tailgating
Jobsite tools

Standout features

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

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