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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.

  • Honda EB5000X
  • Cat RP12000 E
  • Model EB5000X
    Model EB5000X

    Honda 4,500W Gas Generator

    4500W
    Running
    63 dB
    Noise
    View details
  • Model RP12000 E
    Model RP12000 E

    Cat 12,000W Gas Generator

    12000W
    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
SpecificationHonda EB5000XCat RP12000 E
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterNoNo
Parallel capableNoNo
RV readyNoYes
Running watts
4500 W
Winner: Winner: 12000 W
Starting watts
5000 W
Winner: Winner: 15000 W
Noise (lower limit)
Winner: Winner: 63 dB
0 dB
Weight
Winner: Winner: 210.8 lbs
350 lbs
Run time @50% load
10.5 h
Winner: Winner: 11.7 h
Run time @25% load
10.5 h
Not available—
Fuel tank
6.2 gal
13.2 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
41.1 x 27.8 x 30.4
35.7 x 32.7 x 35.8
Electrical
Voltage (AC)
120/240
120/240
Voltage (DC)
Not available—
12
GFCI outletsYesYes
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
10 %
5 %
Engine
Engine
Honda iGX390 OHV 4-stroke, cast iron sleeve
670 cc Rato OHV V-Twin
Alternator
Not available—
Not available—
Starting system
Recoil
Electric
Warranty
Warranty
3 years
2 years
Power by fuel
GasolineNot available—Not available—
Running watts
4500 W
12000 W
Starting watts
5000 W
15000 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
10.5 h
11.7 h
Run time @25% load
Not available—
Not available—
Other
Data center
Not available—
Not available—
Indicators
false
false
Compliance
EPA, ANSI/PGMA G300-2023
CARB, EPA
Security
Not available—
Not available—
Spark arrestorYesYes
Neutral
true
true
UPC
786102007368
815683023891
Core / High-priority specs
Running Watts (Gasoline)
4500
12000
Starting Watts (Gasoline)
5000
15000
Runtime @ 50% Load (Gasoline)
10.5
11.7
AC Outlet Types
2x Duplex 120V 20A (5-20R); 1x 120V 30A (L5-30R); 1x 120/240V 30A (L14-30R)
2x Duplex 120V 20A (5-20R) GFCI; 2x 120V 30A (L5-30R); 1x 120/240V 30A (L14-30R); 1x 120/240V 50A (14-50R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
OHV 4-stroke, cast iron sleeve
670 cc Rato OHV V-Twin
Engine Displacement
389
670
Cylinder Sleeve
Cast iron sleeve
Not available—
Engine Oil Type
10W-30
Not available—
Runtime & fuel system
Runtime @ 50% Load (Gasoline)
10.5
11.7
Safety & compliance
Overload Protection System
Not available—
Low oil and overload protection
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesNo
Included equipment
Starting Components
Not available—
Battery, Battery Charger, Wheel Kit
Included Accessories
Wheel kit
Oil, funnel, tool kit, battery charger, battery, and wheel kit
Warranty & identification
Part Number
EB5000XK3AN
502-3700
Additional specs
Summary
The Honda EB5000X is a 4,500-watt gasoline generator built for job sites and extended outages. Its 389cc Honda engine delivers 5,000 peak watts with a 6.2-gallon tank that runs 10.5 hours at 50% load. The recoil-start design and GFCI outlets handle most household and light commercial loads without inverter complexity.
The Cat RP12000 E is a 12,000-watt gasoline generator built for job sites, construction crews, and homeowners who need sustained power for multiple heavy tools or appliances simultaneously. The 15,000-watt peak output handles startup surges from air compressors, circular saws, and welders without stalling. At 350 pounds, this is a stationary or semi-portable unit. It ships with a wheel kit, battery charger, and full tool set, meaning users can operate it immediately without additional purchases.
  • Most Powerful
    Cat RP12000 E
    12000W running
  • Quietest
    Honda EB5000X
    63 dB
  • Longest Runtime
    Cat RP12000 E
    11.7h at 50% load
Where to buy
Prices can change. We update these automatically.
Honda EB5000X
Store links
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Cat RP12000 E
Store links
No links yet.
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