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

  • Cat RP5500
  • Predator 72920
  • Model RP5500
    Model RP5500

    Cat 5,500W Gas Generator

    5500W
    Running
    0 dB
    Noise
    View details
  • Model 72920
    Model 72920

    Predator 5,500W Gas Generator

    5500W
    Running
    73.5 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
SpecificationCat RP5500Predator 72920
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterNoNo
Parallel capableNoNo
RV readyNoNo
Running watts
Winner: Winner: 5500 W
Winner: Winner: 5500 W
Starting watts
Winner: Winner: 6875 W
6500 W
Noise (lower limit)
0 dB
Winner: Winner: 73.5 dB
Weight
178 lbs
Winner: Winner: 165 lbs
Run time @50% load
Winner: Winner: 15 h
14.5 h
Run time @25% load
Not available
Not available
Fuel tank
7.9 gal
Not available
Fuel gaugeYesNo
Approx. dimensions (L × W × H)
32.9 x 27.4 x 24.7
26-7/8 x 22 x 22-3/4
Electrical
Voltage (AC)
120/240
120/240V
Voltage (DC)
Not available
Not available
GFCI outletsYesNo
Covered outletsYesNo
Automatic Voltage RegulationYesNo
THD
Not available
Not available
Engine
Engine
300 cc OHV 4-stroke
Not available
Alternator
Not available
Not available
Starting system
Recoil
Not available
Warranty
Warranty
2 years
Not available
Power by fuel
GasolineNot availableNot available
Running watts
5500 W
Not available
Starting watts
6875 W
Not available
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
15 h
Not available
Run time @25% load
Not available
Not available
Other
Data center
Not available
Not available
Indicators
false
Not available
Compliance
CARB, EPA
Not available
Security
Not available
Not available
Spark arrestorYesNo
Neutral
Not available
Not available
UPC
815683020036
Not available
Core / High-priority specs
Running Watts (Gasoline)
5500
Not available
Starting Watts (Gasoline)
6875
Not available
Runtime @ 50% Load (Gasoline)
15
Not available
AC Outlet Types
2x Duplex 120V 20A (5-20R) GFCI, 1x 120/240V 30A (L14-30R)
Not available
Electrical & power
Frequency
60
Not available
Engine & construction
Engine Type
OHV 4-stroke
Not available
Engine Displacement
300
301
Engine Oil Type
SAE 30 or 10W-30
Not available
Runtime & fuel system
Runtime @ 50% Load (Gasoline)
15
Not available
Safety & compliance
Overload Protection System
Low oil and overload protection
Not available
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringNoYes
Included equipment
Included Accessories
Oil, funnel, tool kit, and wheel kit
Not available
Warranty & identification
Part Number
502-3686
Not available
Additional specs
Summary
The Cat RP5500 is a 5500-watt gasoline generator built for homeowners, contractors, and outdoor enthusiasts who need reliable backup power without the complexity of larger units. This wattage tier handles most household circuits simultaneously, meaning you can run a refrigerator, well pump, and power tools at the same time, but not your entire home's air conditioning system. The 6875-watt peak capacity gives it the muscle to start high-inrush devices like compressors and sump pumps without stalling. Because the RP5500 runs on gasoline, fuel is available at any gas station, eliminating the supply chain friction of propane or diesel models. The 7.9-gallon tank paired with 15-hour runtime at half load means you refuel roughly once per day under typical use, not every few hours.
The PREDATOR® 6500 Watt Portable Generator is designed for home backup during emergencies and powering tools at jobsites. It features a 301cc gas engine, GFCI outlets, and CO SECURE® carbon monoxide shutdown for safety.
  • Most Powerful
    Cat RP5500
    5500W running
  • Quietest
    Predator 72920
    73.5 dB
  • Longest Runtime
    Cat RP5500
    15h at 50% load
Where to buy
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Cat RP5500
Store links
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Predator 72920
Store links
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