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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 W03383
  • Aceup Energy AI2500S
  • Model W03383
    Model W03383

    Firman 3,300W Gas Generator

    3300W
    Running
    58 dB
    Noise
    View details
  • Model AI2500S
    Model AI2500S

    Aceup Energy 1,900W Gas Inverter Generator

    1900W
    Running
    58 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
SpecificationFirman W03383Aceup Energy AI2500S
General
Product type
Generator
Not available—
Fuel
Gasoline
Gasoline
InverterYesYes
Parallel capableYesYes
RV readyYesYes
Running watts
Winner: Winner: 3300 W
1900 W
Starting watts
Winner: Winner: 3650 W
2500 W
Noise (lower limit)
Winner: Winner: 58 dB
Winner: Winner: 58 dB
Weight
91 lbs
Winner: Winner: 44 lbs
Run time @50% load
Not available—
Not available—
Run time @25% load
9 h
Winner: Winner: 10 h
Fuel tank
1.8 gal
1.32 gal
Fuel gaugeNoNo
Approx. dimensions (L × W × H)
23.2 x 17.8 x 17.9
Not available—
Electrical
Voltage (AC)
120
120V
Voltage (DC)
12
12V
GFCI outletsNoNo
Covered outletsYesNo
Automatic Voltage RegulationYesNo
THD
<3% %
1.5 %
Engine
Engine
193 cc Firman Max-Pro Series OHV 4-stroke, cast iron sleeve
79.8cc 4-Stroke OHV Engine
Alternator
Not available—
Not available—
Starting system
Recoil, Electric, Remote
Recoil Start
Warranty
Warranty
3 years
2 years
Power by fuel
GasolineNot available—Not available—
Running watts
3300 W
1900 W
Starting watts
3650 W
2500 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
9 h
10 h
Other
Data center
Not available—
Not available—
Indicators
true
true
Compliance
CARB, EPA
EPA Compliant
Security
Not available—
Not available—
Spark arrestorYesNo
Neutral
Not available—
Not available—
UPC
840876133835
Not available—
Core / High-priority specs
Running Watts (Gasoline)
3300
1900
Starting Watts (Gasoline)
3650
2500
Runtime @ 25% Load (Gasoline)
9
10
AC Outlet Types
1x Duplex 120V 20A (5-20R)1x 120V 30A (TT-30R)
One 120V 5-20R 20A Outlet
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
OHV 4-stroke
4-Stroke OHV
Engine Displacement
193
79.8
Cylinder Sleeve
cast iron sleeve
Not available—
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
9
10
Controls & display
Display Type
Not available—
Intelligent Gauge
Idle Control System
Not available—
Eco Mode
Safety & compliance
Low Oil ProtectionYesNo
Carbon Monoxide MonitoringNoNo
Included equipment
Included Accessories
Oil, funnel, tool kit, key fob, battery charger, battery charging cables, and battery
Not available—
Warranty & identification
Residential Warranty
Not available—
2
Part Number
Not available—
AI2500S
Additional specs
Summary
The Firman W03383 is a 3300-watt inverter generator built around a 193cc OHV 4-stroke engine with a cast iron sleeve. At this wattage, it can run a refrigerator, microwave, and several lights simultaneously, or power essential household circuits during an outage. The inverter technology keeps total harmonic distortion below 3%, which protects laptops, smartphones, and other sensitive electronics from voltage spikes. This unit bridges the gap between lightweight portables and mid-range backup power, making it useful for both recreational trips and emergency home backup.
The Aceup Energy AI2500S is a gasoline-powered inverter generator with a rated wattage of 1900 watts and a peak wattage of 2500 watts.
  • Most Powerful
    Firman W03383
    3300W running
  • Quietest
    Firman W03383
    58 dB
  • Longest Runtime
    h at 50% load
Where to buy
Prices can change. We update these automatically.
Firman W03383
Store links
No links yet.
Aceup Energy AI2500S
Store links
No links yet.
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