Skip to content

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 GM15000ET
  • Powerhorse s10500id
  • Model GM15000ET
    Model GM15000ET

    Genmax 13,000W Tri-Fuel Generator

    13000W
    Running
    76 dB
    Noise
    View details
  • Model s10500id
    Model s10500id

    Powerhorse 8,300W Dual-Fuel Generator

    8300W
    Running
    62 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 GM15000ETPowerhorse s10500id
General
Product type
Generator
Generator
Fuel
Tri-Fuel
Dual-Fuel
InverterNoYes
Parallel capableNoYes
RV readyYesNo
Running watts
Winner: Winner: 13000 W
8300 W
Starting watts
Winner: Winner: 15000 W
10500 W
Noise (lower limit)
76 dB
Winner: Winner: 62 dB
Weight
242 lbs
Winner: Winner: 209.5 lbs
Run time @50% load
11 h
Winner: Winner: 12 h
Run time @25% load
Not available
Not available
Fuel tank
10.5 gal
7.13 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
28 x 31.6 x 28.7
30 x 26.3 x 28.8
Electrical
Voltage (AC)
120/240
120/240V
Voltage (DC)
12
5V
GFCI outletsNoYes
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
23 %
<3% %
Engine
Engine
520 cc OHV 4-stroke
457 cc OHV 4-stroke
Alternator
Not available
Not available
Starting system
Recoil, Electric, Remote
Recoil, Electric, Remote
Warranty
Warranty
1 years
2 years
Power by fuel
GasolineNot availableNot available
Running watts
11000 W
8300 W
Starting watts
15000 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
11 h
12 h
Run time @25% load
Not available
Not available
Natural gasNot availableNot available
Running watts
12000 W
Not available
Starting watts
12000 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
13000 W
7500 W
Starting watts
13000 W
9450 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
6 h
Run time @25% load
Not available
Not available
Other
Data center
Not available
Not available
Indicators
true
true
Compliance
EPA, ANSI/PGMA G300-2023
EPA, ANSI/PGMA G300-2023
Security
Not available
Not available
Spark arrestorYesYes
Neutral
Floating
true
UPC
760790901382
840321764003
Core / High-priority specs
Running Watts (Gasoline)
11000
8300
Running Watts (Propane)
13000
7500
Running Watts (Natural Gas)
12000
Not available
Starting Watts (Gasoline)
15000
10500
Starting Watts (Propane)
13000
9450
Starting Watts (Natural Gas)
12000
Not available
Runtime @ 50% Load (Gasoline)
11
12
Runtime @ 50% Load (Propane)
Not available
6
AC Outlet Types
AC outlets3x Duplex 120V 20A (5-20R)1x 120/240V 30A (L14-30R)1x 120/240V 50A (14-50R)
1x Duplex 120V 20A (L5-20R) GFCI; 1x 120/240V 30A (L14-30R); 1x 120/240V 50A (14-50R); 1x 120/240V 50A (10-50R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
OHV 4-stroke
OHV 4-stroke
Engine Displacement
520
457
Engine Oil Type
SAE 10W/30
Not available
Runtime & fuel system
Runtime @ 50% Load (Gasoline)
11
12
Runtime @ 50% Load (Propane)
Not available
6
Safety & compliance
Overload Protection System
Low oil and overload protection
Low oil and overload protection
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesYes
Included equipment
Starting Components
Recoil starter; Electric starter; Remote starter
Recoil, Electric, Remote
Included Accessories
Oil, funnel, tool kit, key fob, battery charger, natural gas hose with NPT adapter, propane hose, cover, neutral bonding plug, battery, and wheel kit
Funnel, tool kit, key fob, propane hose, and battery
Warranty & identification
Commercial Warranty
1
Not available
Additional specs
Summary
The Genmax GM15000ET is a 13,000-watt tri-fuel generator built for serious power demands. With 13,000 running watts and 15,000 starting watts, this unit can handle whole-house backup scenarios, including central air conditioning, refrigerators, well pumps, and multiple circuits running simultaneously. Because it runs on gasoline, propane, or natural gas, owners gain real flexibility during emergencies when one fuel source might be unavailable or during extended outages when tapping into a home natural gas line eliminates refueling trips entirely.
The Powerhorse s10500id is a dual-fuel inverter generator delivering 10,500 surge watts and 8,300 rated watts, suitable for emergency home backup, RVs, and worksites.
  • Most Powerful
    Genmax GM15000ET
    13000W running
  • Quietest
    Powerhorse s10500id
    62 dB
  • Longest Runtime
    Powerhorse s10500id
    12h at 50% load
Where to buy
Prices can change. We update these automatically.
Genmax GM15000ET
Store links
No links yet.
Powerhorse s10500id
Store links
No links yet.
Disclosure: Some links may be affiliate links. Specs and comparisons are never hidden.