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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.

  • Pulsar PG6580ECO
  • Cat RP5500
  • Model PG6580ECO
    Model PG6580ECO

    Pulsar 5,300W Gas Generator

    5300W
    Running
    75 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
SpecificationPulsar PG6580ECOCat RP5500
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterNoNo
Parallel capableNoNo
RV readyNoNo
Running watts
5300 W
Winner: Winner: 5500 W
Starting watts
6580 W
Winner: Winner: 6875 W
Noise (lower limit)
Winner: Winner: 75 dB
0 dB
Weight
Winner: Winner: 140 lbs
178 lbs
Run time @50% load
10 h
Winner: Winner: 15 h
Run time @25% load
Not available
Not available
Fuel tank
5.3 gal
7.9 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
26.6 x 19.7 x 18.7
32.9 x 27.4 x 24.7
Electrical
Voltage (AC)
120/240V 60 Hz
120/240
Voltage (DC)
12
Not available
GFCI outletsYesYes
Covered outletsNoYes
Automatic Voltage RegulationYesYes
THD
Not available
Not available
Engine
Engine
Ducar 274 cc OHV 4-stroke
300 cc OHV 4-stroke
Alternator
Not available
Not available
Starting system
Recoil, Electric
Recoil
Warranty
Warranty
2 years
2 years
Power by fuel
GasolineNot availableNot available
Running watts
5300 W
5500 W
Starting watts
6580 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
10 h
15 h
Run time @25% load
Not available
Not available
Other
Data center
Not available
Not available
Indicators
true
false
Compliance
CARB, EPA
CARB, EPA
Security
Not available
Not available
Spark arrestorYesYes
Neutral
true
Not available
UPC
814726027100
815683020036
Core / High-priority specs
Running Watts (Gasoline)
5300
5500
Starting Watts (Gasoline)
6580
6875
Runtime @ 50% Load (Gasoline)
10
15
AC Outlet Types
2x Duplex 120V 20A (5-20R) GFCI; 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
Ducar OHV 4-stroke
OHV 4-stroke
Engine Displacement
274
300
Engine Oil Type
10W-30
SAE 30 or 10W-30
Runtime & fuel system
Runtime @ 50% Load (Gasoline)
10
15
Safety & compliance
Overload Protection System
Low oil and overload protection, CO monitoring
Low oil and overload protection
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesNo
Included equipment
Included Accessories
Funnel, tool kit, battery, and wheel kit
Oil, funnel, tool kit, and wheel kit
Warranty & identification
Part Number
Not available
502-3686
Additional specs
Summary
The Pulsar PG6580ECO is a 6,580-watt gasoline-powered portable generator equipped with a 274cc, 4-stroke, OHV engine. It features electric start with recoil backup, a 5.3-gallon fuel tank providing up to 10 hours of runtime at 50% load, and includes safety features like a CO shutdown sensor and low oil shutdown. Designed for versatility, it offers multiple outlets for various applications and is mounted on a durable powder-coated steel frame with fold-down handles and never-flat wheels for enhanced mobility.
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
    Pulsar PG6580ECO
    75 dB
  • Longest Runtime
    Cat RP5500
    15h at 50% load
Where to buy
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Pulsar PG6580ECO
Store links
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Cat RP5500
Store links
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