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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 W03386
  • Generac #8947 iQ5200DF
  • Model W03386
    Model W03386

    Firman 3,300W Gas Generator

    3300W
    Running
    58 dB
    Noise
    View details
  • Model #8947 iQ5200DF
    Model #8947 iQ5200DF

    Generac 3,900W Dual-Fuel Generator

    3900W
    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 W03386Generac #8947 iQ5200DF
General
Product type
Generator
Generator
Fuel
Gasoline
Dual-Fuel
InverterYesYes
Parallel capableYesYes
RV readyYesNo
Running watts
3300 W
Winner: Winner: 3900 W
Starting watts
3650 W
Winner: Winner: 5200 W
Noise (lower limit)
Winner: Winner: 58 dB
0 dB
Weight
Winner: Winner: 91 lbs
107 lbs
Run time @50% load
Not available
Winner: Winner: 9 h
Run time @25% load
9 h
15 h
Fuel tank
1.8 gal
3.2 gal
Fuel gaugeNoNo
Approx. dimensions (L × W × H)
23.2 x 17.8 x 17.9
24.6 x 20.3 x 22.5
Electrical
Voltage (AC)
120
120
Voltage (DC)
12
5
GFCI outletsNoYes
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
<3% %
<3% %
Engine
Engine
193 cc OHV 4-stroke, cast iron sleeve.
223 cc OHV 4-stroke
Alternator
Not available
Not available
Starting system
Recoil, Electric, Remote
Recoil, Electric
Warranty
Warranty
3 years
3 years
Power by fuel
GasolineNot availableNot available
Running watts
3300 W
3900 W
Starting watts
3650 W
5200 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
9 h
Run time @25% load
9 h
15 h
PropaneNot availableNot available
Running watts
Not available
3500 W
Starting watts
Not available
4700 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
11 h
Run time @25% load
Not available
20 h
Other
Data center
Not available
Not available
Indicators
true
false
Compliance
CARB, EPA
CARB, EPA, ANSI/PGMA G300-2023
Security
Not available
Not available
Spark arrestorYesYes
Neutral
Floating
true
UPC
840876133866
696471104509
Core / High-priority specs
Running Watts (Gasoline)
3300
3900
Running Watts (Propane)
Not available
3500
Starting Watts (Gasoline)
3650
5200
Starting Watts (Propane)
Not available
4700
Runtime @ 50% Load (Gasoline)
Not available
9
Runtime @ 50% Load (Propane)
Not available
11
Runtime @ 25% Load (Gasoline)
9
15
Runtime @ 25% Load (Propane)
Not available
20
AC Outlet Types
1x Duplex 120V 20A (5-20R); 1x 120V 30A (TT-30R)
2x Duplex 120V 20A (5-20R) GFCI; 1x 120V 30A (L5-30R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
OHV 4-stroke
OHV 4-stroke
Engine Displacement
193
223
Cylinder Sleeve
cast iron sleeve
Not available
Engine Oil Type
See 'Add Engine Oil' Section
10W-30 / SAE 30
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
9
15
Runtime @ 50% Load (Gasoline)
Not available
9
Runtime @ 50% Load (Propane)
Not available
11
Safety & compliance
Overload Protection System
Low oil and overload protection
Low oil and overload protection, CO monitoring
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesYes
Included equipment
Starting Components
Not available
Oil, funnel, tool kit, propane hose, and battery
Included Accessories
Oil, funnel, tool kit, key fob, battery charger, battery charging cables, and battery
Oil, funnel, tool kit, propane hose, and battery
Warranty & identification
Commercial Warranty
3
Not available
Part Number
Not available
8947, 8945
Additional specs
Summary
The Firman W03386 is a 3,300-watt inverter generator built for RV camping, emergency backup, and light job site work. Its 3,650-watt peak capacity handles startup surges from air conditioning units, refrigerators, and power tools without strain. Because the unit runs on gasoline with a 1.8-gallon tank, users get up to 9 hours of runtime at 25% load before refueling. The inverter topology and sub-3% THD output means laptops, smartphones, and sensitive electronics charge safely without voltage spikes that damage circuitry. At 58 dB, it operates at conversational volume, making it acceptable for residential neighborhoods and campgrounds where noise restrictions apply. This is a mid-sized workhorse for users who need portable power without the weight penalty of larger stationary units.
The Generac iQ5200DF is a 3,900-watt dual-fuel inverter generator that bridges emergency home backup and recreational use. At this output level, it powers essential circuits like refrigerators, sump pumps, and window air conditioners simultaneously, but not a full house or central HVAC. The dual-fuel design lets owners switch between gasoline and propane based on availability, a genuine advantage when supply chains break down during extended outages. Because the iQ5200DF produces electronically regulated current with less than 3% THD, laptops, flat-screen TVs, CPAP machines, and smart home devices run safely without voltage-related risk.
  • Most Powerful
    Generac #8947 iQ5200DF
    3900W running
  • Quietest
    Firman W03386
    58 dB
  • Longest Runtime
    Generac #8947 iQ5200DF
    9h at 50% load
Where to buy
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Firman W03386
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Generac #8947 iQ5200DF
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