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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 P03503
  • Aceup Energy AG4350
  • Model P03503
    Model P03503

    Firman 3,550W Gas Generator

    3550W
    Running
    67 dB
    Noise
    View details
  • Model AG4350
    Model AG4350

    Aceup Energy 3,500W Gas Generator

    3500W
    Running
    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 P03503Aceup Energy AG4350
General
Product type
Generator
Not available
Fuel
Gasoline
Gasoline
InverterNoNo
Parallel capableNoNo
RV readyYesNo
Running watts
Winner: Winner: 3550 W
3500 W
Starting watts
Winner: Winner: 4450 W
4350 W
Noise (lower limit)
Winner: Winner: 67 dB
Not available
Weight
Winner: Winner: 108.5 lbs
Not available
Run time @50% load
Winner: Winner: 14 h
10 h
Run time @25% load
Not available
Not available
Fuel tank
5 gal
4 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
24.8 x 21.7 x 21.7
Not available
Electrical
Voltage (AC)
120
120V
Voltage (DC)
Not available
Not available
GFCI outletsNoNo
Covered outletsYesNo
Automatic Voltage RegulationYesNo
THD
Not available
Not available
Engine
Engine
208 cc OHV 4-stroke, cast iron sleeve.
7HP 208cc 4-stroke OHV
Alternator
Not available
Not available
Starting system
Recoil
Not available
Warranty
Warranty
3 years
2 years
Power by fuel
GasolineNot availableNot available
Running watts
Not available
3500 W
Starting watts
4450 W
4350 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
10 h
Run time @25% load
Not available
Not available
Other
Data center
Not available
Not available
Indicators
true
false
Compliance
EPA, ANSI/PGMA G300-2023
EPA and CARB compliant
Security
Not available
Not available
Spark arrestorYesNo
Neutral
Floating
Not available
UPC
840876135037
Not available
Core / High-priority specs
Running Watts (Gasoline)
Not available
3500
Starting Watts (Gasoline)
4450
4350
Runtime @ 50% Load (Gasoline)
14
10
AC Outlet Types
1x Duplex 120V 20A (5-20R)1x 120V 30A (L5-30R)1x 120V 30A (TT-30R)
120V 30A L5-30R Twist-Lock, two 20A standard outlets
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
OHV 4-stroke, cast iron sleeve
4-stroke OHV
Engine Displacement
208
208
Cylinder Sleeve
cast iron
Not available
Runtime & fuel system
Runtime @ 50% Load (Gasoline)
14
10
Safety & compliance
Overload Protection System
Low oil and overload protection
Not available
Low Oil ProtectionYesNo
Carbon Monoxide MonitoringYesNo
Included equipment
Mobility Components
Not available
Wheel kits, handle
Starting Components
Not available
Recoil start
Included Accessories
Oil, funnel, tool kit, cover, and wheel kit
Oil funnel, bottle of engine oil, spark plug wrench, wheel kits, handle
Warranty & identification
Residential Warranty
Not available
2
Commercial Warranty
3
Not available
Additional specs
Summary
The Firman P03503 is a 3,550-watt gasoline generator built around a 208cc OHV 4-stroke engine with a cast iron sleeve. This wattage handles mid-range household loads: a refrigerator, microwave, and several outlets running simultaneously, or a modest RV power setup. The 5-gallon fuel tank delivers 14 hours of runtime at 50% load, meaning a full tank covers a typical overnight camping trip or a daytime power outage without refueling. The 4,450 starting watts give it enough surge capacity to turn on air conditioning compressors or well pumps, making it practical for both emergency backup and recreational use.
The Aceup Energy AG4350 is a gasoline-powered generator with a rated wattage of 3500 watts and a peak wattage of 4350 watts. It features a 7HP 208cc 4-stroke OHV engine.
  • Most Powerful
    Firman P03503
    3550W running
  • Quietest
    Firman P03503
    67 dB
  • Longest Runtime
    Firman P03503
    14h at 50% load
Where to buy
Prices can change. We update these automatically.
Firman P03503
Store links
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Aceup Energy AG4350
Store links
No links yet.
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