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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 T04073
  • VEVOR GF12000E-A2
  • Model T04073
    Model T04073

    Firman 4,000W Tri-Fuel Generator

    4000W
    Running
    67 dB
    Noise
    View details
  • Model GF12000E-A2
    Model GF12000E-A2

    VEVOR 9,000W Tri-Fuel Generator

    9000W
    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 T04073VEVOR GF12000E-A2
General
Product type
Generator
Generator
Fuel
Tri-Fuel
Tri-Fuel
InverterNoNo
Parallel capableNoNo
RV readyNoNo
Running watts
4000 W
Winner: Winner: 9000 W
Starting watts
5000 W
Winner: Winner: 13500 W
Noise (lower limit)
Winner: Winner: 67 dB
0 dB
Weight
Winner: Winner: 123.4 lbs
234.8 lbs
Run time @50% load
Winner: Winner: 12 h
9.5 h
Run time @25% load
14 h
Not available
Fuel tank
5 gal
9.2 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
29.8 x 27.5 x 26.1
29.9 x 28.7 x 27.4
Electrical
Voltage (AC)
120/240
AC120V/AC240V
Voltage (DC)
Not available
Not available
GFCI outletsYesNo
Covered outletsYesNo
Automatic Voltage RegulationYesYes
THD
11%-14% %
0 %
Engine
Engine
223 cc OHV 4-stroke, cast iron sleeve
Four-Stroke
Alternator
Not available
Not available
Starting system
Recoil, Electric
Not available
Warranty
Warranty
3 years
0 years
Power by fuel
GasolineNot availableNot available
Running watts
4000 W
9000 W
Starting watts
5000 W
13500 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
14 h
9.5 h
Run time @25% load
Not available
Not available
Natural gasNot availableNot available
Running watts
3200 W
7200 W
Starting watts
4000 W
11000 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
Not available
Not available
PropaneNot availableNot available
Running watts
3600 W
8100 W
Starting watts
4500 W
12000 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
9 h
Not available
Run time @25% load
Not available
Not available
Other
Data center
Not available
Not available
Indicators
true
Not available
Compliance
CARB, EPA, ANSI/PGMA G300-2023
Not available
Security
Not available
Not available
Spark arrestorYesNo
Neutral
true
Not available
UPC
840876140734
Not available
Core / High-priority specs
Generator Type
Not available
Generator
Running Watts (Gasoline)
4000
9000
Running Watts (Propane)
3600
8100
Running Watts (Natural Gas)
3200
7200
Starting Watts (Gasoline)
5000
13500
Starting Watts (Propane)
4500
12000
Starting Watts (Natural Gas)
4000
11000
Runtime @ 50% Load (Gasoline)
14
9.5
Runtime @ 50% Load (Propane)
9
Not available
AC Outlet Types
1x Duplex 120V 20A (5-20R) GFCI; 1x 120V 30A (L5-30R); 1x 120/240V 30A (L14-30R)
Not available
Electrical & power
Frequency
60
Not available
Engine & construction
Engine Type
223 cc OHV 4-stroke
Not available
Engine Displacement
223
500
Cylinder Sleeve
cast iron
Not available
Runtime & fuel system
Runtime @ 50% Load (Gasoline)
14
9.5
Runtime @ 50% Load (Propane)
9
Not available
Outlets & connections
Transfer Switch ReadyNoNo
Safety & compliance
Overload Protection System
Low oil and overload protection, CO monitoring
Not available
Low Oil ProtectionYesNo
Carbon Monoxide MonitoringYesYes
Included equipment
Starting Components
Recoil, Electric
Not available
Included Accessories
Oil, funnel, tool kit, propane hose, RV adapter, cover, battery, and wheel kit
Not available
Warranty & identification
Commercial Warranty
3
Not available
Part Number
Not available
GF12000E-A2
Additional specs
Summary
The Firman T04073 is a 4,000-watt tri-fuel generator that runs on gasoline, propane, or natural gas. On gasoline, it delivers 5,000 starting watts and 4,000 running watts, enough to power a refrigerator, microwave, and multiple household circuits simultaneously. On propane, output drops to 3,600 running watts, and on natural gas it falls to 3,200 running watts. This fuel flexibility means users can switch between sources based on availability and cost, a significant advantage during extended outages or in remote locations where one fuel type may be scarce. The T04073 targets homeowners, RV owners, and job site operators who need reliable backup power without the commitment to a single fuel source. Its 5-gallon tank runs for 14 hours at 25% load on gasoline, translating to roughly one week of emergency backup if you run it a few hours per day. The unit includes a wheel kit, making it easier to position despite its 123.4-pound weight.
The VEVOR GF12000E-A2 is a tri-fuel generator with a rated wattage of 9000 and a peak wattage of 13500.
  • Most Powerful
    VEVOR GF12000E-A2
    9000W running
  • Quietest
    Firman T04073
    67 dB
  • Longest Runtime
    Firman T04073
    12h at 50% load
Where to buy
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Firman T04073
Store links
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VEVOR GF12000E-A2
Store links
No links yet.
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