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  • Champion Power Equipment 201320
  • Firman W03661OF
  • Model 201320
    Model 201320

    Champion Power Equipment 3,650W Gas Generator

    3650W
    Running
    64 dB
    Noise
    View details
  • Model W03661OF
    Model W03661OF

    Firman 3,650W Gas Generator

    3650W
    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 @25%
h
Running watts by fuel
Shows how output changes across gasoline/propane/natural gas (when available).
Generator Specifications Comparison
SpecificationChampion Power Equipment 201320Firman W03661OF
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterYesYes
Parallel capableYesYes
RV readyYesYes
Running watts
Winner: Winner: 3650 W
Winner: Winner: 3650 W
Starting watts
Winner: Winner: 4500 W
Winner: Winner: 4500 W
Noise (lower limit)
Winner: Winner: 64 dB
69 dB
Weight
Winner: Winner: 78 lbs
106 lbs
Run time @50% load
Not available
Not available
Run time @25% load
22 h
Winner: Winner: 25 h
Fuel tank
4.02 gal
6 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
20.9 x 18.3 x 19.4
24.5 x 24.1 x 23
Electrical
Voltage (AC)
120
120
Voltage (DC)
12
12
GFCI outletsNoNo
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
<3% %
3 %
Engine
Engine
224 cc OHV 4-stroke
208 cc OHV 4-stroke, cast iron sleeve.
Alternator
Not available
Not available
Starting system
Recoil
Recoil
Warranty
Warranty
3 years
3 years
Power by fuel
GasolineNot availableNot available
Running watts
3650 W
3650 W
Starting watts
4500 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
Not available
Run time @25% load
22 h
25 h
Other
Data center
Not available
Not available
Indicators
true
true
Compliance
EPA, ANSI/PGMA G300-2023
CARB, EPA
Security
Not available
Not available
Spark arrestorYesYes
Neutral
Floating
Floating
UPC
817198027036
840876136614
Core / High-priority specs
Running Watts (Gasoline)
3650
3650
Starting Watts (Gasoline)
4500
4500
Runtime @ 25% Load (Gasoline)
22
25
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); 1x 120V 50A (14-50R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
224 cc OHV 4-stroke
OHV 4-stroke
Engine Displacement
224
208
Cylinder Sleeve
Not available
Cast iron sleeve
Engine Oil Type
10W-30
Not available
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
22
25
Safety & compliance
Overload Protection System
Low oil and overload protection
Low oil and overload protection
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesYes
Included equipment
Included Accessories
Oil, funnel, and dual port USB adapter
Oil, funnel, tool kit, RV adapter, battery charging cables, and wheel kit
Warranty & identification
Commercial Warranty
3
3
Additional specs
Summary
The Champion 4500W Open Frame Inverter Generator with CO Shield® offers a quieter and lighter power solution, featuring advanced technology for extended run time and clean power, suitable for RVs, tailgating, and home backup.
The Firman W03661OF is a 3650-watt inverter generator built around a 208cc OHV 4-stroke engine. This wattage class powers most household circuits simultaneously, including refrigerators, microwaves, and power tools, making it suitable for home backup and job site work. The gasoline fuel type and 6-gallon tank give users a familiar refueling experience without special infrastructure. Because this unit runs on standard fuel, users can source power anywhere gasoline is sold, a major advantage over propane or dual-fuel models. The inverter technology produces clean power at 3 percent THD, which means laptops, phones, and sensitive electronics charge safely without risk of voltage spikes.
  • Most Powerful
    Champion Power Equipment 201320
    3650W running
  • Quietest
    Champion Power Equipment 201320
    64 dB
  • Longest Runtime
    h at 50% load
Where to buy
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Champion Power Equipment 201320
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Firman W03661OF
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