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  • Generac #7715 GP8000E
  • Cat RP12000 E
  • Model #7715 GP8000E
    Model #7715 GP8000E

    Generac 8,000W Gas Generator

    8000W
    Running
    0 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
SpecificationGenerac #7715 GP8000ECat RP12000 E
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterNoNo
Parallel capableNoNo
RV readyNoYes
Running watts
8000 W
Winner: Winner: 12000 W
Starting watts
10000 W
Winner: Winner: 15000 W
Noise (lower limit)
0 dB
0 dB
Weight
Winner: Winner: 198 lbs
350 lbs
Run time @50% load
10 h
Winner: Winner: 11.7 h
Run time @25% load
15 h
Not available
Fuel tank
7.9 gal
13.2 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
27.2 x 27 x 26.5
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
Not available
5 %
Engine
Engine
Generac OHV 4-stroke, 420 cc
670 cc Rato OHV V-Twin
Alternator
Not available
Not available
Starting system
Recoil, Electric
Electric
Warranty
Warranty
3 years
2 years
Power by fuel
GasolineNot availableNot available
Running watts
8000 W
12000 W
Starting watts
10000 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 h
11.7 h
Run time @25% load
15 h
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
Bonded to frame
true
UPC
696471086225
815683023891
Core / High-priority specs
Running Watts (Gasoline)
8000
12000
Starting Watts (Gasoline)
10000
15000
Runtime @ 50% Load (Gasoline)
10
11.7
Runtime @ 25% Load (Gasoline)
15
Not available
AC Outlet Types
2x Duplex 120V 20A (5-20R) GFCI1x 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
Not available
670 cc Rato OHV V-Twin
Engine Displacement
420
670
Engine Oil Type
10W-30 / SAE 30
Not available
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
15
Not available
Runtime @ 50% Load (Gasoline)
10
11.7
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
Oil, battery, and wheel kit
Battery, Battery Charger, Wheel Kit
Included Accessories
Oil, battery, and wheel kit
Oil, funnel, tool kit, battery charger, battery, and wheel kit
Warranty & identification
Commercial Warranty
3
Not available
Part Number
7715, 7686
502-3700
Additional specs
Summary
The Generac GP8000E is an 8,000-watt gasoline generator built for homeowners and contractors needing whole-house backup power or serious job site output. With 10,000 starting watts, it can handle the initial surge of air conditioners, well pumps, and power tools while running smaller loads continuously. The 7.9-gallon fuel tank delivers 15 hours at 25% load, meaning users can power essential devices through an entire night without refueling.
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
    dB
  • Longest Runtime
    Cat RP12000 E
    11.7h at 50% load
Where to buy
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Generac #7715 GP8000E
Store links
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Cat RP12000 E
Store links
No links yet.
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