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  • Firman T08072
  • Powerhorse s10500id
  • Model T08072
    Model T08072

    Firman 8,000W Tri-Fuel Generator

    8000W
    Running
    74 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
SpecificationFirman T08072Powerhorse s10500id
General
Product type
Generator
Generator
Fuel
Tri-Fuel
Dual-Fuel
InverterNoYes
Parallel capableNoYes
RV readyYesNo
Running watts
8000 W
Winner: Winner: 8300 W
Starting watts
10000 W
Winner: Winner: 10500 W
Noise (lower limit)
74 dB
Winner: Winner: 62 dB
Weight
213 lbs
Winner: Winner: 209.5 lbs
Run time @50% load
Winner: Winner: 12 h
Winner: Winner: 12 h
Run time @25% load
12 h
Not available
Fuel tank
8 gal
7.13 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
29.8 x 27.5 x 26.1
30 x 26.3 x 28.8
Electrical
Voltage (AC)
120/240
120/240V
Voltage (DC)
Not available
5V
GFCI outletsYesYes
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
Not available
<3% %
Engine
Engine
439 cc OHV 4-stroke.
457 cc OHV 4-stroke
Alternator
Not available
Not available
Starting system
Recoil, Electric
Recoil, Electric, Remote
Warranty
Warranty
3 years
2 years
Power by fuel
GasolineNot availableNot available
Running watts
8000 W
8300 W
Starting watts
10000 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
12 h
12 h
Run time @25% load
Not available
Not available
Natural gasNot availableNot available
Running watts
5500 W
Not available
Starting watts
6900 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
7250 W
7500 W
Starting watts
9050 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
CARB, EPA, ANSI/PGMA G300-2023
EPA, ANSI/PGMA G300-2023
Security
Not available
Not available
Spark arrestorYesYes
Neutral
Bonded to frame.
true
UPC
840876180723
840321764003
Core / High-priority specs
Running Watts (Gasoline)
8000
8300
Running Watts (Propane)
7250
7500
Running Watts (Natural Gas)
5500
Not available
Starting Watts (Gasoline)
10000
10500
Starting Watts (Propane)
9050
9450
Starting Watts (Natural Gas)
6900
Not available
Runtime @ 50% Load (Gasoline)
12
12
Runtime @ 50% Load (Propane)
Not available
6
AC Outlet Types
1x Duplex 120V 20A (5-20R) GFCI; 1x 120V 30A (L5-30R); 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
439 cc OHV 4-stroke
OHV 4-stroke
Engine Displacement
439
457
Cylinder Sleeve
Cast iron sleeve
Not available
Runtime & fuel system
Runtime @ 50% Load (Gasoline)
12
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
Mobility Components
Yes
Not available
Starting Components
Not available
Recoil, Electric, Remote
Included Accessories
Oil, funnel, tool kit, natural gas hose with NPT adapter, propane hose, battery, and wheel kit.
Funnel, tool kit, key fob, propane hose, and battery
Warranty & identification
Commercial Warranty
3
Not available
Additional specs
Summary
The Firman T08072 is an 8,000-watt tri-fuel generator built for users who need flexibility across fuel sources and sustained power output. Running on gasoline, propane, or natural gas, this unit delivers 10,000 peak watts on startup, enough to handle simultaneous demands like air compressors, power tools, and household appliances. The tri-fuel capability means users can switch fuels based on availability and cost, a significant advantage for job sites, RV travel, or emergency backup where fuel supply chains vary. On gasoline, the T08072 runs at full 8,000 watts. On propane, output drops to 7,250 watts. On natural gas, it falls to 5,500 watts. This tiered output reflects the energy density of each fuel type and shapes what users can realistically power during extended outages or remote work. The 8-gallon tank delivers 12 hours of runtime at both 25% and 50% load on gasoline, meaning users can operate a moderate load overnight without refueling. For job sites and backup power scenarios, this runtime eliminates mid-shift fuel stops.
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
    Powerhorse s10500id
    8300W running
  • Quietest
    Powerhorse s10500id
    62 dB
  • Longest Runtime
    Firman T08072
    12h at 50% load
Where to buy
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Firman T08072
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Powerhorse s10500id
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