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

  • Ryobi RY906500S
  • Cat RP6500 E
  • Model RY906500S
    Model RY906500S

    Ryobi 6,500W Gas Generator

    6500W
    Running
    72 dB
    Noise
    View details
  • Model RP6500 E
    Model RP6500 E

    Cat 6,500W Gas Generator

    6500W
    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
SpecificationRyobi RY906500SCat RP6500 E
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterNoNo
Parallel capableNoNo
RV readyNoNo
Running watts
Winner: Winner: 6500 W
Winner: Winner: 6500 W
Starting watts
Winner: Winner: 8125 W
Winner: Winner: 8125 W
Noise (lower limit)
Winner: Winner: 72 dB
0 dB
Weight
Winner: Winner: 195 lbs
202 lbs
Run time @50% load
10 h
Winner: Winner: 12 h
Run time @25% load
Not available
Not available
Fuel tank
6 gal
7.9 gal
Fuel gaugeNoYes
Approx. dimensions (L × W × H)
39 x 29 x 24.5
32.9 x 27.4 x 24.7
Electrical
Voltage (AC)
120/240
120/240
Voltage (DC)
Not available
Not available
GFCI outletsYesYes
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
20 %
Not available
Engine
Engine
420 cc OHV 4-stroke
420 cc OHV 4-stroke
Alternator
Not available
Not available
Starting system
Recoil
Recoil, Electric
Warranty
Warranty
3 years
2 years
Power by fuel
GasolineNot availableNot available
Running watts
6500 W
6500 W
Starting watts
8125 W
8125 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
12 h
Run time @25% load
Not available
Not available
Other
Data center
Not available
Not available
Indicators
false
false
Compliance
EPA
CARB, EPA
Security
Not available
Not available
Spark arrestorYesYes
Neutral
Bonded to frame
true
UPC
46396023483
815683020067
Core / High-priority specs
Running Watts (Gasoline)
6500
6500
Starting Watts (Gasoline)
8125
8125
Runtime @ 50% Load (Gasoline)
10
12
AC Outlet Types
2x Duplex 120V 20A (5-20R) GFCI1x 120/240V 30A (L14-30R)
2x Duplex 120V 20A (5-20R); 1x 120/240V 30A (L14-30R); 1x 120V 30A (L5-30R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
OHV 4-stroke
OHV 4-stroke
Engine Displacement
420
420
Engine Oil Type
Not available
SAE 30 or 10W-30
Runtime & fuel system
Runtime @ 50% Load (Gasoline)
10
12
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
Starting Components
Not available
Recoil, Electric
Included Accessories
Oil, tool kit, and wheel kit
Oil, funnel, tool kit, battery, and wheel kit
Warranty & identification
Commercial Warranty
3
Not available
Part Number
Not available
502-3688
Additional specs
Summary
The Ryobi RY906500S is a 6,500-watt gasoline-powered portable generator equipped with a CO shutdown sensor for enhanced safety. It features a 6-gallon fuel tank providing up to 10 hours of runtime at 50% load, and includes multiple outlets for versatile power needs.
The Cat RP6500 E is a 6500-watt gasoline generator built for residential backup and light commercial work. Its 8125-watt peak capacity means it can start large tools and appliances that draw high inrush current, then sustain 6500 watts of continuous power for multiple devices simultaneously. A 7.9-gallon fuel tank delivers 12 hours of runtime at 50% load, which translates to roughly one full workday or overnight backup without refueling. The gasoline engine is straightforward to maintain and refuel anywhere, making this unit practical for job sites, outdoor events, and emergency home power.
  • Most Powerful
    Ryobi RY906500S
    6500W running
  • Quietest
    Ryobi RY906500S
    72 dB
  • Longest Runtime
    Cat RP6500 E
    12h at 50% load
Where to buy
Prices can change. We update these automatically.
Ryobi RY906500S
Store links
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Cat RP6500 E
Store links
No links yet.
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