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

  • Firman W02981
  • Genmax GM3500Xi
  • Model W02981
    Model W02981

    Firman 2,900W Gas Generator

    2900W
    Running
    58 dB
    Noise
    View details
  • Model GM3500Xi
    Model GM3500Xi

    Genmax 3,200W Gas Generator

    3200W
    Running
    66 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
SpecificationFirman W02981Genmax GM3500Xi
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterYesYes
Parallel capableYesYes
RV readyYesNo
Running watts
2900 W
Winner: Winner: 3200 W
Starting watts
3200 W
Winner: Winner: 3500 W
Noise (lower limit)
Winner: Winner: 58 dB
66 dB
Weight
84 lbs
Winner: Winner: 57.3 lbs
Run time @50% load
Not available
Winner: Winner: 8.5 h
Run time @25% load
10 h
13.5 h
Fuel tank
1.8 gal
2.24 gal
Fuel gaugeNoNo
Approx. dimensions (L × W × H)
23.2 x 17.8 x 17.9
18.9 x 13.6 x 17.7
Electrical
Voltage (AC)
120
120V 60 Hz
Voltage (DC)
12
5
GFCI outletsNoNo
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
3 %
≤3% %
Engine
Engine
171 cc Firman Max-Pro Series OHV 4-stroke, cast iron sleeve
Dinking OHV 4-stroke
Alternator
Not available
Not available
Starting system
Recoil
Recoil
Warranty
Warranty
3 years
1 years
Power by fuel
GasolineNot availableNot available
Running watts
2900 W
3200 W
Starting watts
3200 W
3500 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
Not available
8.5 h
Run time @25% load
10 h
Not available
Other
Data center
Not available
Not available
Indicators
true
true
Compliance
CARB, EPA
EPA, ANSI/PGMA G300-2023
Security
Not available
Not available
Spark arrestorYesYes
Neutral
Floating
Not available
UPC
840876129814
713424639045
Core / High-priority specs
Running Watts (Gasoline)
2900
3200
Starting Watts (Gasoline)
3200
3500
Runtime @ 50% Load (Gasoline)
Not available
8.5
Runtime @ 25% Load (Gasoline)
10
Not available
AC Outlet Types
1x Duplex 120V 20A (5-20R)1x 120V 30A (TT-30R)
1x Duplex 120V 20A (5-20R); 1x 120V 30A (L5-30R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
Firman Max-Pro Series OHV 4-stroke
Dinking OHV 4-stroke
Engine Displacement
171
145
Cylinder Sleeve
cast iron sleeve
Not available
Engine Oil Type
Not available
SAE 10W/30
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
10
Not available
Runtime @ 50% Load (Gasoline)
Not available
8.5
Safety & compliance
Overload Protection System
Low oil and overload protection
Low oil and overload protection, CO monitoring
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringNoYes
Included equipment
Included Accessories
Oil, funnel, tool kit, and battery charging cables
Funnel and tool kit
Warranty & identification
Commercial Warranty
3
Not available
Additional specs
Summary
The Firman W02981 is a 2,900-watt inverter generator built around a 171cc Max-Pro Series OHV 4-stroke engine with a cast iron sleeve. This wattage runs a refrigerator, microwave, and several household circuits simultaneously, or powers a small RV setup with air conditioning. The 1.8-gallon fuel tank delivers 10 hours of runtime at 25% load, meaning light-duty operation stretches a single tank across a full workday or camping trip. At 58 decibels, it operates quietly enough for residential neighborhoods and campgrounds. The 3% THD output protects laptops, phones, and sensitive electronics from voltage spikes that damage circuits. Weighing 84 pounds with a wheel kit included, it sits at the threshold between portable and stationary, requiring two hands or a dolly for regular movement.
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.
  • Most Powerful
    Genmax GM3500Xi
    3200W running
  • Quietest
    Firman W02981
    58 dB
  • Longest Runtime
    Genmax GM3500Xi
    8.5h at 50% load
Where to buy
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Firman W02981
Store links
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Genmax GM3500Xi
Store links
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