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

  • Westinghouse WGen5300sc
  • Cat RP5500
  • Model WGen5300sc
    Model WGen5300sc

    Westinghouse 5,300W Gas Generator

    5300W
    Running
    68 dB
    Noise
    View details
  • Model RP5500
    Model RP5500

    Cat 5,500W Gas Generator

    5500W
    Running
    0 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
SpecificationWestinghouse WGen5300scCat RP5500
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterNoNo
Parallel capableNoNo
RV readyYesNo
Running watts
5300 W
Winner: Winner: 5500 W
Starting watts
6600 W
Winner: Winner: 6875 W
Noise (lower limit)
Winner: Winner: 68 dB
0 dB
Weight
Winner: Winner: 133.8 lbs
178 lbs
Run time @50% load
11 h
Winner: Winner: 15 h
Run time @25% load
14.5 h
Not available
Fuel tank
4.7 gal
7.9 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
23.2 x 20.1 x 19.1
32.9 x 27.4 x 24.7
Electrical
Voltage (AC)
120/240
120/240
Voltage (DC)
Not available
Not available
GFCI outletsNoYes
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
23 %
Not available
Engine
Engine
274 cc OHV 4-stroke, cast iron sleeve
300 cc OHV 4-stroke
Alternator
Not available
Not available
Starting system
Recoil, Electric
Recoil
Warranty
Warranty
3 years
2 years
Power by fuel
GasolineNot availableNot available
Running watts
5300 W
5500 W
Starting watts
6600 W
6875 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
11 h
15 h
Run time @25% load
14.5 h
Not available
Other
Data center
Not available
Not available
Indicators
false
false
Compliance
CARB, EPA
CARB, EPA
Security
Not available
Not available
Spark arrestorYesYes
Neutral
Floating
Not available
UPC
850011336724
815683020036
Core / High-priority specs
Running Watts (Gasoline)
5300
5500
Starting Watts (Gasoline)
6600
6875
Runtime @ 50% Load (Gasoline)
11
15
Runtime @ 25% Load (Gasoline)
14.5
Not available
AC Outlet Types
1x Duplex 120V 20A (5-20R)1x 120V 30A (TT-30R)1x 120/240V 30A (L14-30R)
2x Duplex 120V 20A (5-20R) GFCI, 1x 120/240V 30A (L14-30R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
OHV 4-stroke
OHV 4-stroke
Engine Displacement
274
300
Cylinder Sleeve
cast iron sleeve
Not available
Engine Oil Type
SAE 10W-30
SAE 30 or 10W-30
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
14.5
Not available
Runtime @ 50% Load (Gasoline)
11
15
Safety & compliance
Overload Protection System
Low oil and overload protection
Low oil and overload protection
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesNo
Included equipment
Starting Components
Recoil, Electric
Not available
Included Accessories
Oil, funnel, tool kit, battery, and wheel kit
Oil, funnel, tool kit, and wheel kit
Warranty & identification
Commercial Warranty
3
Not available
Part Number
Not available
502-3686
Additional specs
Summary
The Westinghouse WGen5300sc is a portable gas-powered generator delivering 6,600 peak watts and 5,300 running watts, ideal for home backup and RV use.
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.
  • Most Powerful
    Cat RP5500
    5500W running
  • Quietest
    Westinghouse WGen5300sc
    68 dB
  • Longest Runtime
    Cat RP5500
    15h at 50% load
Where to buy
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Westinghouse WGen5300sc
Store links
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Cat RP5500
Store links
No links yet.
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