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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 W03381
  • Powermate PM4500
  • Model W03381
    Model W03381

    Firman 3,300W Gas Generator

    3300W
    Running
    58 dB
    Noise
    View details
  • Model PM4500
    Model PM4500

    Powermate 3,600W Gas Generator

    3600W
    Running
    0 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 W03381Powermate PM4500
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterYesNo
Parallel capableYesNo
RV readyYesNo
Running watts
3300 W
Winner: Winner: 3600 W
Starting watts
3650 W
Winner: Winner: 4500 W
Noise (lower limit)
Winner: Winner: 58 dB
0 dB
Weight
Winner: Winner: 87 lbs
105 lbs
Run time @50% load
Not available
Winner: Winner: 14 h
Run time @25% load
10 h
19 h
Fuel tank
1.8 gal
5 gal
Fuel gaugeNoYes
Approx. dimensions (L × W × H)
23.2 x 17.8 x 17.9
26.3 x 22.9 x 21.5
Electrical
Voltage (AC)
120
120
Voltage (DC)
12
Not available
GFCI outletsNoYes
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
3 %
Not available
Engine
Engine
193 cc Firman Max-Pro Series OHV 4-Stroke, Cast Iron Sleeve
Generac OHV 4-stroke 224 cc
Alternator
Not available
Not available
Starting system
Recoil
Recoil
Warranty
Warranty
3 years
3 years
Power by fuel
GasolineNot availableNot available
Running watts
3300 W
3600 W
Starting watts
3650 W
4500 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
14 h
Run time @25% load
10 h
19 h
Other
Data center
Not available
Not available
Indicators
true
false
Compliance
CARB, EPA
CARB, EPA
Security
Not available
Not available
Spark arrestorYesYes
Neutral
Floating
true
UPC
840876133811
696471080346
Core / High-priority specs
Running Watts (Gasoline)
3300
3600
Starting Watts (Gasoline)
3650
4500
Runtime @ 50% Load (Gasoline)
Not available
14
Runtime @ 25% Load (Gasoline)
10
19
AC Outlet Types
1x Duplex 120V 20A (5-20R); 1x 120V 30A (TT-30R)
2x Duplex 120V 20A (5-20R) GFCI1x 120V 30A (L5-30R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
OHV 4-Stroke
OHV
Engine Displacement
193
224
Cylinder Sleeve
Cast iron sleeve
Not available
Engine Oil Type
10W-30
10W-30 / SAE 30
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
10
19
Runtime @ 50% Load (Gasoline)
Not available
14
Safety & compliance
Overload Protection System
Low oil and overload protection
Low oil and overload protection
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringNoYes
Included equipment
Starting Components
Recoil
Not available
Included Accessories
Oil, funnel, tool kit, and battery charging cables
Oil and wheel kit
Warranty & identification
Commercial Warranty
3
3
Part Number
Not available
P0081200
Additional specs
Summary
The Firman W03381 is a 3300-watt inverter generator built around a 193cc OHV 4-stroke engine with a cast iron sleeve. This wattage puts it in the mid-range portable segment, capable of powering a refrigerator, microwave, and several household circuits simultaneously, or running a single large tool on a job site. The 3650-watt starting capacity handles the inrush demand of compressors and air conditioning units. Because the W03381 runs on gasoline with a 1.8-gallon tank, users will find a 10-hour runtime at 25% load, which translates to roughly 2.5 hours of continuous full-load operation before refueling becomes necessary. The inverter topology and 3% THD output mean sensitive electronics like laptops, phones, and televisions receive stable, clean power without risk of damage. At 58 decibels, this generator operates at a volume comparable to normal conversation, making it suitable for residential neighborhoods and RV parks where noise restrictions apply.
The Powermate PM4500 is a 4500-watt portable generator featuring COsense® Technology for carbon monoxide protection, a Generac® 224CC OHV Engine, and a 19-hour run time at 25% load.
  • Most Powerful
    Powermate PM4500
    3600W running
  • Quietest
    Firman W03381
    58 dB
  • Longest Runtime
    Powermate PM4500
    14h at 50% load
Where to buy
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Firman W03381
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Powermate PM4500
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