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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.

  • Generac #8947 iQ5200DF
  • Genmax GM10500iETC
  • Model #8947 iQ5200DF
    Model #8947 iQ5200DF

    Generac 3,900W Dual-Fuel Generator

    3900W
    Running
    0 dB
    Noise
    View details
  • Model GM10500iETC
    Model GM10500iETC

    Genmax 8,500W Tri-Fuel Generator

    8500W
    Running
    64 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 #8947 iQ5200DFGenmax GM10500iETC
General
Product type
Generator
Generator
Fuel
Dual-Fuel
Tri-Fuel
InverterYesYes
Parallel capableYesYes
RV readyNoYes
Running watts
3900 W
Winner: Winner: 8500 W
Starting watts
5200 W
Winner: Winner: 10500 W
Noise (lower limit)
0 dB
Winner: Winner: 64 dB
Weight
Winner: Winner: 107 lbs
244.7 lbs
Run time @50% load
Winner: Winner: 9 h
Not available—
Run time @25% load
15 h
14 h
Fuel tank
3.2 gal
6.9 gal
Fuel gaugeNoYes
Approx. dimensions (L × W × H)
24.6 x 20.3 x 22.5
30.9 x 22.6 x 29.3
Electrical
Voltage (AC)
120
120/240
Voltage (DC)
5
12
GFCI outletsYesNo
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
<3% %
≤3% %
Engine
Engine
223 cc OHV 4-stroke
458 cc OHV 4-stroke
Alternator
Not available—
Not available—
Starting system
Recoil, Electric
Recoil, Electric, Remote
Warranty
Warranty
3 years
1 years
Power by fuel
GasolineNot available—Not available—
Running watts
3900 W
8500 W
Starting watts
5200 W
10500 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
9 h
Not available—
Run time @25% load
15 h
14 h
PropaneNot available—Not available—
Running watts
3500 W
8000 W
Starting watts
4700 W
9500 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
11 h
Not available—
Run time @25% load
20 h
Not available—
Natural gasNot available—Not available—
Running watts
Not available—
6800 W
Starting watts
Not available—
8400 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—
Not available—
Run time @25% load
Not available—
Not available—
Other
Data center
Not available—
Not available—
Indicators
false
true
Compliance
CARB, EPA, ANSI/PGMA G300-2023
CARB, EPA, ANSI/PGMA G300-2023
Security
Not available—
Not available—
Spark arrestorYesYes
Neutral
true
Floating
UPC
696471104509
742332650842
Core / High-priority specs
Running Watts (Gasoline)
3900
8500
Running Watts (Propane)
3500
8000
Running Watts (Natural Gas)
Not available—
6800
Starting Watts (Gasoline)
5200
10500
Starting Watts (Propane)
4700
9500
Starting Watts (Natural Gas)
Not available—
8400
Runtime @ 50% Load (Gasoline)
9
Not available—
Runtime @ 50% Load (Propane)
11
Not available—
Runtime @ 25% Load (Gasoline)
15
14
Runtime @ 25% Load (Propane)
20
Not available—
AC Outlet Types
2x Duplex 120V 20A (5-20R) GFCI; 1x 120V 30A (L5-30R)
2x Duplex 120V 20A (5-20R); 1x 120/240V 30A (L14-30R); 1x 120/240V 50A (14-50R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
OHV 4-stroke
458 cc OHV 4-stroke
Engine Displacement
223
458
Engine Oil Type
10W-30 / SAE 30
SAE 10W/30
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
15
14
Runtime @ 50% Load (Gasoline)
9
Not available—
Runtime @ 50% Load (Propane)
11
Not available—
Safety & compliance
Overload Protection System
Low oil and overload protection, CO monitoring
Low oil and overload protection
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesYes
Included equipment
Starting Components
Oil, funnel, tool kit, propane hose, and battery
Recoil, Electric, Remote
Included Accessories
Oil, funnel, tool kit, propane hose, and battery
Funnel, tool kit, key fob, battery charger, natural gas hose with NPT adapter, propane hose, RV adapter, cover, neutral bonding plug, and battery
Warranty & identification
Residential Warranty
Not available—
1
Commercial Warranty
Not available—
1
Part Number
8947, 8945
Not available—
Additional specs
Summary
The Generac iQ5200DF is a 3,900-watt dual-fuel inverter generator that bridges emergency home backup and recreational use. At this output level, it powers essential circuits like refrigerators, sump pumps, and window air conditioners simultaneously, but not a full house or central HVAC. The dual-fuel design lets owners switch between gasoline and propane based on availability, a genuine advantage when supply chains break down during extended outages. Because the iQ5200DF produces electronically regulated current with less than 3% THD, laptops, flat-screen TVs, CPAP machines, and smart home devices run safely without voltage-related risk.
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.
  • Most Powerful
    Genmax GM10500iETC
    8500W running
  • Quietest
    Genmax GM10500iETC
    64 dB
  • Longest Runtime
    Generac #8947 iQ5200DF
    9h at 50% load
Where to buy
Prices can change. We update these automatically.
Generac #8947 iQ5200DF
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Genmax GM10500iETC
Store links
No links yet.
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