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Compare Generators Side-by-Side

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

  • Firman W03381
  • Ryobi RY904500
  • Model W03381
    Model W03381

    Firman 3,300W Gas Generator

    3300W
    Running
    58 dB
    Noise
    View details
  • Model RY904500
    Model RY904500

    Ryobi 3,600W Gas Generator

    3600W
    Running
    82 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 W03381Ryobi RY904500
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterYesNo
Parallel capableYesNo
RV readyYesYes
Running watts
3300 W
Winner: Winner: 3600 W
Starting watts
3650 W
Winner: Winner: 4500 W
Noise (lower limit)
Winner: Winner: 58 dB
82 dB
Weight
Winner: Winner: 87 lbs
115 lbs
Run time @50% load
Not available
Winner: Winner: 10 h
Run time @25% load
10 h
Not available
Fuel tank
1.8 gal
4 gal
Fuel gaugeNoNo
Approx. dimensions (L × W × H)
23.2 x 17.8 x 17.9
24 x 26 x 20
Electrical
Voltage (AC)
120
120
Voltage (DC)
12
Not available
GFCI outletsNoNo
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
3 %
Not available
Engine
Engine
193 cc Firman Max-Pro Series OHV 4-Stroke, Cast Iron Sleeve
212 cc OHV 4-stroke
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
10 h
Run time @25% load
10 h
Not available
Other
Data center
Not available
Not available
Indicators
true
false
Compliance
CARB, EPA
EPA
Security
Not available
Not available
Spark arrestorYesYes
Neutral
Floating
Not available
UPC
840876133811
46396056023
Core / High-priority specs
Running Watts (Gasoline)
3300
3600
Starting Watts (Gasoline)
3650
4500
Runtime @ 50% Load (Gasoline)
Not available
10
Runtime @ 25% Load (Gasoline)
10
Not available
AC Outlet Types
1x Duplex 120V 20A (5-20R); 1x 120V 30A (TT-30R)
2x Duplex 120V 20A (5-20R) 1x 120V 30A (TT-30R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
OHV 4-Stroke
OHV 4-stroke
Engine Displacement
193
212
Cylinder Sleeve
Cast iron sleeve
Not available
Engine Oil Type
10W-30
Not available
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
10
Not available
Runtime @ 50% Load (Gasoline)
Not available
10
Safety & compliance
Overload Protection System
Low oil and overload protection
Low oil and overload protection
Low Oil ProtectionYesNo
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
Not available
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 Ryobi RY904500 is a 3600-watt portable gasoline generator, delivering 4500 starting watts. It features a 212cc OHV engine, a 4-gallon fuel tank providing up to 10 hours of runtime at 50% load, and is RV-ready with a 120V 30A RV outlet.
  • Most Powerful
    Ryobi RY904500
    3600W running
  • Quietest
    Firman W03381
    58 dB
  • Longest Runtime
    Ryobi RY904500
    10h at 50% load
Where to buy
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Firman W03381
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Ryobi RY904500
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