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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.

  • Energizer eZV3500P
  • Firman T04073
  • Model eZV3500P
    Model eZV3500P

    Energizer 3,000W Gas Generator

    3000W
    Running
    57 dB
    Noise
    View details
  • Model T04073
    Model T04073

    Firman 4,000W Tri-Fuel Generator

    4000W
    Running
    67 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
SpecificationEnergizer eZV3500PFirman T04073
General
Product type
Generator
Generator
Fuel
Gasoline
Tri-Fuel
InverterYesNo
Parallel capableYesNo
RV readyNoNo
Running watts
3000 W
Winner: Winner: 4000 W
Starting watts
3500 W
Winner: Winner: 5000 W
Noise (lower limit)
Winner: Winner: 57 dB
67 dB
Weight
Winner: Winner: 96 lbs
123.4 lbs
Run time @50% load
Not available—
Winner: Winner: 12 h
Run time @25% load
15.5 h
14 h
Fuel tank
1.95 gal
5 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
22.8 x 16.7 x 17.5
29.8 x 27.5 x 26.1
Electrical
Voltage (AC)
120
120/240
Voltage (DC)
12
Not available—
GFCI outletsNoYes
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
Not available—
11%-14% %
Engine
Engine
212 cc OHV 4-stroke
223 cc OHV 4-stroke, cast iron sleeve
Alternator
Not available—
Not available—
Starting system
Recoil, Electric, Remote
Recoil, Electric
Warranty
Warranty
3 years
3 years
Power by fuel
GasolineNot available—Not available—
Running watts
3000 W
4000 W
Starting watts
3500 W
5000 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
15.5 h
Not available—
Natural gasNot available—Not available—
Running watts
Not available—
3200 W
Starting watts
Not available—
4000 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 available—Not available—
Running watts
Not available—
3600 W
Starting watts
Not available—
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—
9 h
Run time @25% load
Not available—
Not available—
Other
Data center
Not available—
Not available—
Indicators
true
true
Compliance
CARB, EPA
CARB, EPA, ANSI/PGMA G300-2023
Security
Not available—
Not available—
Spark arrestorYesYes
Neutral
Floating
true
UPC
Not available—
840876140734
Core / High-priority specs
Running Watts (Gasoline)
3000
4000
Running Watts (Propane)
Not available—
3600
Running Watts (Natural Gas)
Not available—
3200
Starting Watts (Gasoline)
3500
5000
Starting Watts (Propane)
Not available—
4500
Starting Watts (Natural Gas)
Not available—
4000
Runtime @ 50% Load (Gasoline)
Not available—
14
Runtime @ 50% Load (Propane)
Not available—
9
Runtime @ 25% Load (Gasoline)
15.5
Not available—
AC Outlet Types
1x Duplex 120V 20A (5-20R) 1x 120V 30A (L5-30R)
1x Duplex 120V 20A (5-20R) GFCI; 1x 120V 30A (L5-30R); 1x 120/240V 30A (L14-30R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
OHV 4-stroke
223 cc OHV 4-stroke
Engine Displacement
212
223
Cylinder Sleeve
Not available—
cast iron
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
15.5
Not available—
Runtime @ 50% Load (Gasoline)
Not available—
14
Runtime @ 50% Load (Propane)
Not available—
9
Safety & compliance
Overload Protection System
Low oil and overload protection
Low oil and overload protection, CO monitoring
Low Oil ProtectionNoYes
Carbon Monoxide MonitoringNoYes
Included equipment
Starting Components
Recoil, Electric, Remote
Recoil, Electric
Included Accessories
Funnel, tool kit, key fob, battery charging cables, and battery
Oil, funnel, tool kit, propane hose, RV adapter, cover, battery, and wheel kit
Warranty & identification
Commercial Warranty
3
3
Part Number
INVEZV3500PD
Not available—
Additional specs
Summary
The Energizer eZV3500P is a 3,000-watt inverter generator built for users who need portable power without sacrificing convenience. At 3,000 running watts, this unit can power a refrigerator, microwave, and several power tools simultaneously. The 3,500-watt peak capacity handles the startup surge of air conditioning units and compressors. Gasoline fuel means no special storage concerns and easy refueling at any gas station. The eZV3500P targets outdoor enthusiasts and homeowners who value flexibility in how they start the generator. Three starting options—recoil, electric, and remote—mean you can start it by hand, press a button on the unit, or trigger it from 100 feet away with the included key fob. The inverter technology protects laptops, phones, and other sensitive electronics from voltage spikes. A 3-year warranty covers defects across the generator's core components.
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.
  • Most Powerful
    Firman T04073
    4000W running
  • Quietest
    Energizer eZV3500P
    57 dB
  • Longest Runtime
    Firman T04073
    12h at 50% load
Where to buy
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Energizer eZV3500P
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Firman T04073
Store links
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