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Select up to 4 generators to compare specs, power output, noise levels, runtime and more. Your compare URL is shareable.

  • Briggs & Stratton 30728 Storm Responder
  • Cummins Onan P5000iDF EFI
  • Model 30728 Storm Responder
    Model 30728 Storm Responder

    Briggs & Stratton 6,250W Gas Generator

    6250W
    Running
    0 dB
    Noise
    View details
  • Model Onan P5000iDF EFI
    Model Onan P5000iDF EFI

    Cummins 3,900W Dual-Fuel Generator

    3900W
    Running
    52 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 30728 Storm ResponderCummins Onan P5000iDF EFI
General
Product type
Generator
Generator
Fuel
Gasoline
Dual-Fuel
InverterNoYes
Parallel capableNoYes
RV readyNoYes
Running watts
Winner: Winner: 6250 W
3900 W
Starting watts
Winner: Winner: 8500 W
5000 W
Noise (lower limit)
0 dB
Winner: Winner: 52 dB
Weight
210 lbs
Winner: Winner: 108 lbs
Run time @50% load
11 h
Winner: Winner: 13 h
Run time @25% load
Not available
16.8 h
Fuel tank
7.5 gal
3.4 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
28 x 27 x 28
25.1 x 18.1 x 21.2
Electrical
Voltage (AC)
120/240
120
Voltage (DC)
Not available
5
GFCI outletsYesNo
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
Not available
3 %
Engine
Engine
Briggs & Stratton®
224 cc 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
6250 W
3900 W
Starting watts
8500 W
5000 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
13 h
Run time @25% load
Not available
16.8 h
PropaneNot availableNot available
Running watts
Not available
3500 W
Starting watts
Not available
4500 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
20 h
Other
Data center
Not available
Not available
Indicators
true
true
Compliance
ANSI/PGMA G300-2018
CARB, EPA, ANSI/PGMA G300-2023
Security
Not available
Not available
Spark arrestorYesYes
Neutral
true
Floating
UPC
11675307288
Not available
Core / High-priority specs
Running Watts (Gasoline)
6250
3900
Running Watts (Propane)
Not available
3500
Starting Watts (Gasoline)
8500
5000
Starting Watts (Propane)
Not available
4500
Runtime @ 50% Load (Gasoline)
11
13
Runtime @ 25% Load (Gasoline)
Not available
16.8
Runtime @ 25% Load (Propane)
Not available
20
AC Outlet Types
2x Duplex 120V 20A (5-20R); 1x 120/240V 30A (L14-30R)
1x Duplex 120V 20A (5-20R) 1x 120V 30A (TT-30R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
1850 Series™ OHV Engine
224 cc OHV 4-stroke
Engine Displacement
420
224
Runtime & fuel system
Runtime @ 25% Load (Gasoline)
Not available
16.8
Runtime @ 50% Load (Gasoline)
11
13
Controls & display
Display Type
StatStation™ Digital Display
Not available
Idle Control System
No
Not available
Safety & compliance
Overload Protection System
Low oil and overload protection; CO monitoring
Low oil and overload protection; CO monitoring
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesYes
Included equipment
Mobility Components
10" Never Go Flat Wheels
Not available
Starting Components
Recoil
Not available
Documentation
operator's manual or illustrated parts list
Not available
Included Accessories
Extension cord and wheel kit
Not available
Warranty & identification
Residential Warranty
2
Not available
Commercial Warranty
0.25
3
Part Number
030728
A075C500
Additional specs
Summary
The Briggs & Stratton 30728 Storm Responder is a 6250-watt gasoline generator built for homeowners and job sites that need sustained power for essential appliances and tools. With 8500 peak watts, it can start large loads like air compressors and refrigerators that draw high inrush current. The 7.5-gallon fuel tank delivers 11 hours of runtime at half load, meaning users can run the unit through a full workday or overnight without refueling. This is a stationary-leaning portable unit, not a grab-and-go machine.
The Cummins Onan P5000iDF EFI is a 3900-watt dual-fuel inverter generator built for RV owners, campers, and homeowners who need reliable portable power without excessive noise. Its 5000-watt peak capacity handles startup demands of air conditioners, power tools, and multiple appliances simultaneously. The dual-fuel design means you can run gasoline when convenient and switch to propane for longer storage life or when gasoline is unavailable. At 52 dBA, this unit operates as quietly as normal conversation, making it suitable for campgrounds and residential neighborhoods where noise restrictions apply. The inverter technology produces clean power with only 3 percent THD, protecting laptops, smartphones, and sensitive electronics from voltage spikes that damage circuits.
  • Most Powerful
    Briggs & Stratton 30728 Storm Responder
    6250W running
  • Quietest
    Cummins Onan P5000iDF EFI
    52 dB
  • Longest Runtime
    Cummins Onan P5000iDF EFI
    13h at 50% load
Where to buy
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Briggs & Stratton 30728 Storm Responder
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Cummins Onan P5000iDF EFI
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