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  • Genmax GM10500XiT
  • Cat RP6500 E
  • Model GM10500XiT
    Model GM10500XiT

    Genmax 7,800W Tri-Fuel Generator

    7800W
    Running
    74 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
SpecificationGenmax GM10500XiTCat RP6500 E
General
Product type
Generator
Generator
Fuel
Tri-Fuel
Gasoline
InverterYesNo
Parallel capableYesNo
RV readyYesNo
Running watts
Winner: Winner: 7800 W
6500 W
Starting watts
Winner: Winner: 10500 W
8125 W
Noise (lower limit)
Winner: Winner: 74 dB
0 dB
Weight
Winner: Winner: 123.5 lbs
202 lbs
Run time @50% load
Not available
Winner: Winner: 12 h
Run time @25% load
13.5 h
Not available
Fuel tank
5.8 gal
7.9 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
25.2 x 19.8 x 21.3
32.9 x 27.4 x 24.7
Electrical
Voltage (AC)
120/240
120/240
Voltage (DC)
12
Not available
GFCI outletsNoYes
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
≤3% %
Not available
Engine
Engine
312 cc OHV 4-stroke
420 cc OHV 4-stroke
Alternator
Not available
Not available
Starting system
Recoil, Electric, Remote
Recoil, Electric
Warranty
Warranty
1 years
2 years
Power by fuel
GasolineNot availableNot available
Running watts
7800 W
6500 W
Starting watts
10500 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
Not available
12 h
Run time @25% load
13.5 h
Not available
Natural gasNot availableNot available
Running watts
6250 W
Not available
Starting watts
8500 W
Not available
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
Not available
Not available
Run time @25% load
Not available
Not available
PropaneNot availableNot available
Running watts
7000 W
Not available
Starting watts
8500 W
Not available
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
Not available
Not available
Run time @25% load
Not available
Not available
Other
Data center
Not available
Not available
Indicators
true
false
Compliance
EPA, ANSI/PGMA G300-2023
CARB, EPA
Security
Not available
Not available
Spark arrestorYesYes
Neutral
Floating
true
UPC
760790248388
815683020067
Core / High-priority specs
Running Watts (Gasoline)
7800
6500
Running Watts (Propane)
7000
Not available
Running Watts (Natural Gas)
6250
Not available
Starting Watts (Gasoline)
10500
8125
Starting Watts (Propane)
8500
Not available
Starting Watts (Natural Gas)
8500
Not available
Runtime @ 50% Load (Gasoline)
Not available
12
Runtime @ 25% Load (Gasoline)
13.5
Not available
AC Outlet Types
1x Duplex 120V 20A (5-20R) 1x 120/240V 30A (L14-30R) 1x 120/240V 50A (14-50R)
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
312 cc OHV 4-stroke
OHV 4-stroke
Engine Displacement
312
420
Engine Oil Type
SAE 10W/30
SAE 30 or 10W-30
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
13.5
Not available
Runtime @ 50% Load (Gasoline)
Not available
12
Safety & compliance
Overload Protection System
Low oil and overload protection
Low oil and overload protection
Low Oil ProtectionNoYes
Carbon Monoxide MonitoringYesNo
Included equipment
Starting Components
Not available
Recoil, Electric
Included Accessories
Funnel, tool kit, key fob, natural gas hose with NPT adapter, propane hose, cover, neutral bonding plug, battery, and wheel kit
Oil, funnel, tool kit, battery, and wheel kit
Warranty & identification
Part Number
Not available
502-3688
Additional specs
Summary
The Genmax GM10500XiT is a 7,800-watt tri-fuel inverter generator delivering whole-house backup power and jobsite capability. Its tri-fuel design runs on gasoline, propane, or natural gas, eliminating fuel sourcing constraints during emergencies. The inverter technology maintains THD at 3% or below, making it safe for laptops, medical devices, and smart TVs.
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
    Genmax GM10500XiT
    7800W running
  • Quietest
    Genmax GM10500XiT
    74 dB
  • Longest Runtime
    Cat RP6500 E
    12h at 50% load
Where to buy
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Genmax GM10500XiT
Store links
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Cat RP6500 E
Store links
No links yet.
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