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Select up to 4 generators to compare specs, power output, noise levels, runtime and more. Your compare URL is shareable.

  • Genmax GM3500Xi
  • Sportsman GEN4000-SS
  • Model GM3500Xi
    Model GM3500Xi

    Genmax 3,200W Gas Generator

    3200W
    Running
    66 dB
    Noise
    View details
  • Model GEN4000-SS
    Model GEN4000-SS

    Sportsman 3,500W Gas Generator

    3500W
    Running
    69 dB
    Noise
    View details
Quick charts
Each chart uses its own Y-axis scale (so numbers are comparable within a chart).
Running watts
W
Starting watts
W
Noise
dB
Runtime @50%
h
Running watts by fuel
Shows how output changes across gasoline/propane/natural gas (when available).
Generator Specifications Comparison
SpecificationGenmax GM3500XiSportsman GEN4000-SS
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterYesNo
Parallel capableYesNo
RV readyNoYes
Running watts
3200 W
Winner: Winner: 3500 W
Starting watts
3500 W
Winner: Winner: 4000 W
Noise (lower limit)
Winner: Winner: 66 dB
69 dB
Weight
Winner: Winner: 57.3 lbs
91 lbs
Run time @50% load
8.5 h
Winner: Winner: 10 h
Run time @25% load
13.5 h
Not available
Fuel tank
2.24 gal
3.9 gal
Fuel gaugeNoNo
Approx. dimensions (L × W × H)
18.9 x 13.6 x 17.7
23 x 19.5 x 17.5
Electrical
Voltage (AC)
120V 60 Hz
120
Voltage (DC)
5
12
GFCI outletsNoNo
Covered outletsYesNo
Automatic Voltage RegulationYesYes
THD
≤3% %
Not available
Engine
Engine
Dinking OHV 4-stroke
212 cc OHV 4-stroke
Alternator
Not available
Not available
Starting system
Recoil
Recoil
Warranty
Warranty
1 years
1 years
Power by fuel
GasolineNot availableNot available
Running watts
3200 W
3500 W
Starting watts
3500 W
4000 W
Running amps (120V)
Not available
Not available
Running amps (240V)
Not available
Not available
Peak amps (120V)
Not available
Not available
Peak amps (240V)
Not available
Not available
Run time @50% load
8.5 h
10 h
Run time @25% load
Not available
Not available
Other
Data center
Not available
Not available
Indicators
true
false
Compliance
EPA, ANSI/PGMA G300-2023
EPA
Security
Not available
Not available
Spark arrestorYesYes
Neutral
Not available
Not available
UPC
713424639045
27077082470
Core / High-priority specs
Running Watts (Gasoline)
3200
3500
Starting Watts (Gasoline)
3500
4000
Runtime @ 50% Load (Gasoline)
8.5
10
AC Outlet Types
1x Duplex 120V 20A (5-20R); 1x 120V 30A (L5-30R)
2x Duplex 120V 20A (5-20R)1x 120V 30A (TT-30R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
Dinking OHV 4-stroke
OHV 4-stroke
Engine Displacement
145
212
Engine Oil Type
SAE 10W/30
SAE10W-30
Runtime & fuel system
Runtime @ 50% Load (Gasoline)
8.5
10
Safety & compliance
Overload Protection System
Low oil and overload protection, CO monitoring
Low oil and overload protection
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesNo
Included equipment
Starting Components
Not available
Recoil
Included Accessories
Funnel and tool kit
Funnel, tool kit, and battery charging cables
Additional specs
Summary
The Genmax GM3500Xi is a 3,200-watt inverter generator built for homeowners, campers, and job site work. Its 3,500-watt peak output handles essential appliances and power tools, while the inverter technology keeps sensitive electronics safe. At 57.3 pounds, it moves easily between locations.
The Sportsman GEN4000-SS is a gasoline-powered generator offering 4000 surge watts and 3500 running watts, suitable for running RVs, household appliances, and power tools.
  • Most Powerful
    Sportsman GEN4000-SS
    3500W running
  • Quietest
    Genmax GM3500Xi
    66 dB
  • Longest Runtime
    Sportsman GEN4000-SS
    10h at 50% load
Where to buy
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Genmax GM3500Xi
Store links
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Sportsman GEN4000-SS
Store links
No links yet.
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