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  • Briggs & Stratton 30728 Storm Responder
  • Powerhorse s12500t
  • Model 30728 Storm Responder
    Model 30728 Storm Responder

    Briggs & Stratton 6,250W Gas Generator

    6250W
    Running
    0 dB
    Noise
    View details
  • Model s12500t
    Model s12500t

    Powerhorse 9,500W Gas Generator

    9500W
    Running
    97 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 ResponderPowerhorse s12500t
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterNoNo
Parallel capableNoNo
RV readyNoNo
Running watts
6250 W
Winner: Winner: 9500 W
Starting watts
8500 W
Winner: Winner: 12500 W
Noise (lower limit)
0 dB
Winner: Winner: 97 dB
Weight
Winner: Winner: 210 lbs
235 lbs
Run time @50% load
Winner: Winner: 11 h
9 h
Run time @25% load
Not available
Not available
Fuel tank
7.5 gal
6.6 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
28 x 27 x 28
29.3 x 26.7 x 26.4
Electrical
Voltage (AC)
120/240
120/240
Voltage (DC)
Not available
5
GFCI outletsYesYes
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
Not available
<23% %
Engine
Engine
Briggs & Stratton®
457 cc OHV 4-stroke
Alternator
Not available
Not available
Starting system
Recoil
Recoil, Electric, Remote
Warranty
Warranty
2 years
2 years
Power by fuel
GasolineNot availableNot available
Running watts
6250 W
9500 W
Starting watts
8500 W
12500 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
9 h
Run time @25% load
Not available
Not available
Natural gasNot availableNot available
Running watts
Not available
7125 W
Starting watts
Not available
9375 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
PropaneNot availableNot available
Running watts
Not available
8550 W
Starting watts
Not available
9375 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
true
true
Compliance
ANSI/PGMA G300-2018
EPA, ANSI/PGMA G300-2023
Security
Not available
Not available
Spark arrestorYesYes
Neutral
true
true
UPC
11675307288
840321764034
Core / High-priority specs
Running Watts (Gasoline)
6250
9500
Running Watts (Propane)
Not available
8550
Running Watts (Natural Gas)
Not available
7125
Starting Watts (Gasoline)
8500
12500
Starting Watts (Propane)
Not available
9375
Starting Watts (Natural Gas)
Not available
9375
Runtime @ 50% Load (Gasoline)
11
9
AC Outlet Types
2x Duplex 120V 20A (5-20R); 1x 120/240V 30A (L14-30R)
2x Duplex 120V 20A (5-20R) GFCI; 1x 120/240V 30A (L14-30R); 1x 120/240V 50A (14-50R)
Electrical & power
Frequency
60
60
Engine & construction
Engine Type
1850 Series™ OHV Engine
OHV 4-stroke
Engine Displacement
420
457
Runtime & fuel system
Runtime @ 50% Load (Gasoline)
11
9
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
Not available
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesYes
Included equipment
Mobility Components
10" Never Go Flat Wheels
Yes
Starting Components
Recoil
Recoil, Electric, Remote
Fuel Connection Components
Not available
natural gas hose with NPT adapter, propane hose
Documentation
operator's manual or illustrated parts list
Not available
Included Accessories
Extension cord and wheel kit
Funnel, tool kit, key fob, natural gas hose with NPT adapter, propane hose, and wheel kit
Warranty & identification
Residential Warranty
2
Not available
Commercial Warranty
0.25
Not available
Part Number
030728
6075695
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 Powerhorse s12500t is a versatile 12,500-watt tri-fuel portable generator equipped with electric start and CO shutdown features, suitable for various power needs.
  • Most Powerful
    Powerhorse s12500t
    9500W running
  • Quietest
    Powerhorse s12500t
    97 dB
  • Longest Runtime
    Briggs & Stratton 30728 Storm Responder
    11h at 50% load
Where to buy
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Briggs & Stratton 30728 Storm Responder
Store links
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Powerhorse s12500t
Store links
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