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  • Briggs & Stratton 30728 Storm Responder
  • Cat RP12000 E
  • Model 30728 Storm Responder
    Model 30728 Storm Responder

    Briggs & Stratton 6,250W Gas Generator

    6250W
    Running
    0 dB
    Noise
    View details
  • Model RP12000 E
    Model RP12000 E

    Cat 12,000W Gas Generator

    12000W
    Running
    0 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 ResponderCat RP12000 E
General
Product type
Generator
Generator
Fuel
Gasoline
Gasoline
InverterNoNo
Parallel capableNoNo
RV readyNoYes
Running watts
6250 W
Winner: Winner: 12000 W
Starting watts
8500 W
Winner: Winner: 15000 W
Noise (lower limit)
0 dB
0 dB
Weight
Winner: Winner: 210 lbs
350 lbs
Run time @50% load
11 h
Winner: Winner: 11.7 h
Run time @25% load
Not available
Not available
Fuel tank
7.5 gal
13.2 gal
Fuel gaugeYesYes
Approx. dimensions (L × W × H)
28 x 27 x 28
35.7 x 32.7 x 35.8
Electrical
Voltage (AC)
120/240
120/240
Voltage (DC)
Not available
12
GFCI outletsYesYes
Covered outletsYesYes
Automatic Voltage RegulationYesYes
THD
Not available
5 %
Engine
Engine
Briggs & Stratton®
670 cc Rato OHV V-Twin
Alternator
Not available
Not available
Starting system
Recoil
Electric
Warranty
Warranty
2 years
2 years
Power by fuel
GasolineNot availableNot available
Running watts
6250 W
12000 W
Starting watts
8500 W
15000 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
11.7 h
Run time @25% load
Not available
Not available
Other
Data center
Not available
Not available
Indicators
true
false
Compliance
ANSI/PGMA G300-2018
CARB, EPA
Security
Not available
Not available
Spark arrestorYesYes
Neutral
true
true
UPC
11675307288
815683023891
Core / High-priority specs
Running Watts (Gasoline)
6250
12000
Starting Watts (Gasoline)
8500
15000
Runtime @ 50% Load (Gasoline)
11
11.7
AC Outlet Types
2x Duplex 120V 20A (5-20R); 1x 120/240V 30A (L14-30R)
2x Duplex 120V 20A (5-20R) GFCI; 2x 120V 30A (L5-30R); 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
670 cc Rato OHV V-Twin
Engine Displacement
420
670
Runtime & fuel system
Runtime @ 50% Load (Gasoline)
11
11.7
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
Low Oil ProtectionYesYes
Carbon Monoxide MonitoringYesNo
Included equipment
Mobility Components
10" Never Go Flat Wheels
Not available
Starting Components
Recoil
Battery, Battery Charger, Wheel Kit
Documentation
operator's manual or illustrated parts list
Not available
Included Accessories
Extension cord and wheel kit
Oil, funnel, tool kit, battery charger, battery, and wheel kit
Warranty & identification
Residential Warranty
2
Not available
Commercial Warranty
0.25
Not available
Part Number
030728
502-3700
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 Cat RP12000 E is a 12,000-watt gasoline generator built for job sites, construction crews, and homeowners who need sustained power for multiple heavy tools or appliances simultaneously. The 15,000-watt peak output handles startup surges from air compressors, circular saws, and welders without stalling. At 350 pounds, this is a stationary or semi-portable unit. It ships with a wheel kit, battery charger, and full tool set, meaning users can operate it immediately without additional purchases.
  • Most Powerful
    Cat RP12000 E
    12000W running
  • Quietest
    dB
  • Longest Runtime
    Cat RP12000 E
    11.7h at 50% load
Where to buy
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Briggs & Stratton 30728 Storm Responder
Store links
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Cat RP12000 E
Store links
No links yet.
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