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.

  • Briggs & Stratton 30737
  • Cummins Onan P9500df
  • No image
    Model 30737

    Briggs & Stratton 5,000W Gas Generator

    5000W
    Running
    0 dB
    Noise
    View details
  • Model Onan P9500df
    Model Onan P9500df

    Cummins 7,500W Dual-Fuel Generator

    7500W
    Running
    74 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
SpecificationBriggs & Stratton 30737Cummins Onan P9500df
General
Product type
Generator
Generator
Fuel
Gasoline
Dual-Fuel
InverterNoNo
Parallel capableNoNo
RV readyNoNo
Running watts
5000 W
Winner: Winner: 7500 W
Starting watts
6250 W
Winner: Winner: 9500 W
Noise (lower limit)
0 dB
Winner: Winner: 74 dB
Weight
Winner: Winner: 184 lbs
194 lbs
Run time @50% load
Winner: Winner: 12 h
11 h
Run time @25% load
Not available
16 h
Fuel tank
7.5 gal
6.6 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
29 x 26 x 27
27.3 x 26.3 x 26.3
Electrical
Voltage (AC)
120/240
120/240
Voltage (DC)
Not available
Not available
GFCI outletsYesYes
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
Not available
23 %
Engine
Engine
Briggs & Stratton PowerBuilt™ OHV 4-stroke
420 cc Ducar OHV 4-stroke
Alternator
Not available
Not available
Starting system
Recoil
Recoil, Electric, Remote
Warranty
Warranty
2 years
3 years
Power by fuel
GasolineNot availableNot available
Running watts
5000 W
7500 W
Starting watts
6250 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
12 h
11 h
Run time @25% load
Not available
16 h
PropaneNot availableNot available
Running watts
Not available
6750 W
Starting watts
Not available
8550 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
8 h
Other
Data center
Not available
Not available
Indicators
false
false
Compliance
N/A
EPA
Security
Not available
Not available
Spark arrestorYesYes
Neutral
Not available
true
UPC
11675307370
690781007932
Core / High-priority specs
Running Watts (Gasoline)
5000
7500
Running Watts (Propane)
Not available
6750
Starting Watts (Gasoline)
6250
9500
Starting Watts (Propane)
Not available
8550
Runtime @ 50% Load (Gasoline)
12
11
Runtime @ 25% Load (Gasoline)
Not available
16
Runtime @ 25% Load (Propane)
Not available
8
AC Outlet Types
2x Duplex 120V 20A (5-20R) GFCI 1x Duplex 120V 20A (5-20R) 1x 120/240V 30A (L14-30R)
2x Duplex 120V 20A (5-20R); 1x 120/240V 30A (L14-30R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
Briggs & Stratton PowerBuilt™ OHV 4-stroke
Ducar OHV 4-stroke
Engine Displacement
389
420
Engine Oil Type
Not available
SAE 10W-30
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
Not available
16
Runtime @ 50% Load (Gasoline)
12
11
Safety & compliance
Overload Protection System
Low oil and overload protection
Low oil and overload protection
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesYes
Included equipment
Included Accessories
Oil and wheel kit
Oil, funnel, tool kit, key fob, battery charger, propane hose, battery, and wheel kit
Warranty & identification
Commercial Warranty
Not available
3
Part Number
Not available
A074Z438
Additional specs
Summary
The Briggs & Stratton 30737 is a 5000-watt gasoline generator built for homeowners and job site operators who need extended runtime without constant refueling. With 5000 running watts and 6250 peak watts, this unit can power a refrigerator, multiple lights, and power tools simultaneously, making it suitable for emergency backup or outdoor work. The 7.5-gallon fuel tank delivers 12 hours of runtime at half load, which means a full day of operation before refueling becomes necessary. This is a stationary-duty machine. At 184 pounds, it requires wheels or multiple people to move, so placement matters before startup.
The Cummins Onan P9500df is a 7500-watt dual-fuel generator built for users who need sustained power across multiple scenarios. Running on either gasoline or propane, it delivers 9500 peak watts, enough to start large air conditioning units or power multiple job site tools simultaneously. The dual-fuel architecture means users can switch between fuel sources based on availability and storage constraints. Propane tanks store longer without degradation, while gasoline offers wider accessibility. This flexibility makes the unit valuable for both seasonal backup power and year-round work environments. The 194-pound weight and 27.3 x 26.3 x 26.3 inch footprint define this as a semi-portable unit. The included wheel kit enables movement across job sites or between storage locations, but this is not a grab-and-go machine. Users planning frequent relocation should factor in the logistical demands. The three-year commercial warranty covers manufacturing defects, giving buyers defined ownership support across the critical early-use period.
  • Most Powerful
    Cummins Onan P9500df
    7500W running
  • Quietest
    Cummins Onan P9500df
    74 dB
  • Longest Runtime
    Briggs & Stratton 30737
    12h at 50% load
Where to buy
Prices can change. We update these automatically.
Briggs & Stratton 30737
Store links
No links yet.
Cummins Onan P9500df
Store links
No links yet.
Disclosure: Some links may be affiliate links. Specs and comparisons are never hidden.