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Select up to 4 generators to compare specs, power output, noise levels, runtime and more. Your compare URL is shareable.

  • Generac #7153 GP3300i
  • Sportsman GENMAX1500
  • Model #7153 GP3300i
    Model #7153 GP3300i

    Generac 2,500W Gas Generator

    2500W
    Running
    0 dB
    Noise
    View details
  • Model GENMAX1500
    Model GENMAX1500

    Sportsman 900W Gas Generator

    900W
    Running
    65 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
SpecificationGenerac #7153 GP3300iSportsman GENMAX1500
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterYesNo
Parallel capableYesNo
RV readyNoNo
Running watts
Winner: Winner: 2500 W
900 W
Starting watts
Winner: Winner: 3300 W
1500 W
Noise (lower limit)
0 dB
Winner: Winner: 65 dB
Weight
59.5 lbs
Winner: Winner: 45 lbs
Run time @50% load
4.5 h
Winner: Winner: 8 h
Run time @25% load
7 h
Not available
Fuel tank
1.06 gal
1 gal
Fuel gaugeNoNo
Approx. dimensions (L × W × H)
22.2 x 13.3 x 18.4
16 x 14 x 16
Electrical
Voltage (AC)
120
120
Voltage (DC)
5
12
GFCI outletsNoNo
Covered outletsNoNo
Automatic Voltage RegulationYesNo
THD
<3% %
Not available
Engine
Engine
Generac OHV 149 cc 4-stroke
72 cc 2-stroke
Alternator
Not available
Not available
Starting system
Recoil
Recoil
Warranty
Warranty
3 years
1 years
Power by fuel
GasolineNot availableNot available
Running watts
2500 W
900 W
Starting watts
3300 W
1500 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
4.5 h
8 h
Run time @25% load
7 h
Not available
Other
Data center
Not available
Not available
Indicators
true
false
Compliance
EPA, ANSI/PGMA G300-2023
EPA
Security
Not available
Not available
Spark arrestorYesNo
Neutral
Not available
Not available
UPC
696471104011
27077805444
Core / High-priority specs
Running Watts (Gasoline)
2500
900
Starting Watts (Gasoline)
3300
1500
Runtime @ 50% Load (Gasoline)
4.5
8
Runtime @ 25% Load (Gasoline)
7
Not available
AC Outlet Types
1x Duplex 120V 20A (5-20R) 1x 120V 30A (L5-30R)
1x Duplex 120V 20A (5-20R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
OHV 4-stroke
2-stroke
Engine Displacement
149
72
Engine Oil Type
10W-30 / SAE 30
Not available
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
7
Not available
Runtime @ 50% Load (Gasoline)
4.5
8
Safety & compliance
Low Oil ProtectionYesNo
Carbon Monoxide MonitoringYesNo
Included equipment
Starting Components
Recoil
Not available
Included Accessories
Not available
Tool kit and battery charging cables
Warranty & identification
Part Number
71533
Not available
Additional specs
Summary
The Generac GP3300i is a 2,500-watt inverter generator built for users who need portable, clean power without the weight penalty. At 59.5 lbs, it moves easily between campsites, tailgates, and home backup scenarios. The 3,300-watt starting capacity handles motor-driven equipment, while sub-3% THD protects laptops and phones from voltage spikes.
The Sportsman GENMAX1500 is a portable 2-cycle gasoline generator offering 1,500 surge watts and 900 running watts, suitable for powering common household appliances and power tools.
  • Most Powerful
    Generac #7153 GP3300i
    2500W running
  • Quietest
    Sportsman GENMAX1500
    65 dB
  • Longest Runtime
    Sportsman GENMAX1500
    8h at 50% load
Where to buy
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Generac #7153 GP3300i
Store links
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Sportsman GENMAX1500
Store links
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