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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.

  • Genmax GM10500iETC
  • Sportsman GEN9000DF
  • Model GM10500iETC
    Model GM10500iETC

    Genmax 8,500W Tri-Fuel Generator

    8500W
    Running
    64 dB
    Noise
    View details
  • Model GEN9000DF
    Model GEN9000DF

    Sportsman 8,000W Dual-Fuel Generator

    8000W
    Running
    80 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 GM10500iETCSportsman GEN9000DF
General
Product type
Generator
Generator
Fuel
Tri-Fuel
Dual-Fuel
InverterYesNo
Parallel capableYesNo
RV readyYesYes
Running watts
Winner: Winner: 8500 W
8000 W
Starting watts
Winner: Winner: 10500 W
9000 W
Noise (lower limit)
Winner: Winner: 64 dB
80 dB
Weight
244.7 lbs
Winner: Winner: 200 lbs
Run time @50% load
Not available—
Winner: Winner: 10 h
Run time @25% load
14 h
Not available—
Fuel tank
6.9 gal
8 gal
Fuel gaugeYesNo
Approx. dimensions (L × W × H)
30.9 x 22.6 x 29.3
29.5 x 23 x 20.5
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
458 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
1 years
Power by fuel
GasolineNot available—Not available—
Running watts
8500 W
8000 W
Starting watts
10500 W
9000 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—
10 h
Run time @25% load
14 h
Not available—
Natural gasNot available—Not available—
Running watts
6800 W
Not available—
Starting watts
8400 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 available—Not available—
Running watts
8000 W
7200 W
Starting watts
9500 W
8100 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—
5 h
Run time @25% load
Not available—
Not available—
Other
Data center
Not available—
Not available—
Indicators
true
false
Compliance
CARB, EPA, ANSI/PGMA G300-2023
EPA
Security
Not available—
Not available—
Spark arrestorYesNo
Neutral
Floating
Not available—
UPC
742332650842
27077801606
Core / High-priority specs
Running Watts (Gasoline)
8500
8000
Running Watts (Propane)
8000
7200
Running Watts (Natural Gas)
6800
Not available—
Starting Watts (Gasoline)
10500
9000
Starting Watts (Propane)
9500
8100
Starting Watts (Natural Gas)
8400
Not available—
Runtime @ 50% Load (Gasoline)
Not available—
10
Runtime @ 50% Load (Propane)
Not available—
5
Runtime @ 25% Load (Gasoline)
14
Not available—
AC Outlet Types
2x Duplex 120V 20A (5-20R); 1x 120/240V 30A (L14-30R); 1x 120/240V 50A (14-50R)
2x Duplex 120V 20A (5-20R) GFCI; 1x 120/240V 30A (L14-30R); 1x 120V 30A (TT-30R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
458 cc OHV 4-stroke
OHV 4-stroke
Engine Displacement
458
420
Engine Oil Type
SAE 10W/30
SAE10W-30
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
14
Not available—
Runtime @ 50% Load (Gasoline)
Not available—
10
Runtime @ 50% Load (Propane)
Not available—
5
Safety & compliance
Overload Protection System
Low oil and overload protection
Low oil and overload protection
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesNo
Included equipment
Starting Components
Recoil, Electric, Remote
Recoil; Electric
Included Accessories
Funnel, tool kit, key fob, battery charger, natural gas hose with NPT adapter, propane hose, RV adapter, cover, neutral bonding plug, and battery
Tool kit, propane hose, battery charging cables, and wheel kit
Warranty & identification
Residential Warranty
1
Not available—
Commercial Warranty
1
1
Additional specs
Summary
The Genmax GM10500iETC is an 8500-watt tri-fuel inverter generator that runs on gasoline, propane, or natural gas. This wattage handles mid-to-large loads like air conditioning units, power tools, and multiple household appliances simultaneously. The tri-fuel flexibility means users can switch fuels based on availability and cost, a significant advantage for both emergency backup and remote work sites.
The Sportsman GEN9000DF is a dual fuel generator capable of delivering 9000 surge watts and 8000 running watts, powered by a 15.0 HP 4-Stroke OHV engine. It offers both recoil and electric start options and includes multiple outlets for versatile use.
  • Most Powerful
    Genmax GM10500iETC
    8500W running
  • Quietest
    Genmax GM10500iETC
    64 dB
  • Longest Runtime
    Sportsman GEN9000DF
    10h at 50% load
Where to buy
Prices can change. We update these automatically.
Genmax GM10500iETC
Store links
No links yet.
Sportsman GEN9000DF
Store links
No links yet.
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