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 30728 Storm Responder
- Yamaha EF5500D
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).
| Specification | Briggs & Stratton 30728 Storm Responder | Yamaha EF5500D |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Gasoline |
| Inverter | No | No |
| Parallel capable | No | No |
| RV ready | No | No |
| Running watts | Winner: Winner: 6250 W | 4500 W |
| Starting watts | Winner: Winner: 8500 W | 5500 W |
| Noise (lower limit) | 0 dB | Winner: Winner: 74.1 dB |
| Weight | Winner: Winner: 210 lbs | 216.1 lbs |
| Run time @50% load | 11 h | Winner: Winner: 13.5 h |
| Run time @25% load | Not available | Not available |
| Fuel tank | 7.5 gal | 6.9 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 28 x 27 x 28 | 29.1 x 29 x 31.5 in |
| Electrical | ||
| Voltage (AC) | 120/240 | 120/240V 60 Hz |
| Voltage (DC) | Not available | Not available |
| GFCI outlets | Yes | Yes |
| Covered outlets | Yes | No |
| Automatic Voltage Regulation | Yes | Yes |
| THD | Not available | Not available |
| Engine | ||
| Engine | Briggs & Stratton® | Yamaha MZ360 OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil | Recoil |
| Warranty | ||
| Warranty | 2 years | 3 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 6250 W | 4500 W |
| Starting watts | 8500 W | 5500 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 | 13.5 h |
| Run time @25% load | Not available | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | true |
| Compliance | ANSI/PGMA G300-2018 | CARB, EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | true | true |
| UPC | 11675307288 | Not available |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 6250 | 4500 |
| Starting Watts (Gasoline) | 8500 | 5500 |
| Runtime @ 50% Load (Gasoline) | 11 | 13.5 |
| AC Outlet Types | 2x Duplex 120V 20A (5-20R); 1x 120/240V 30A (L14-30R) | 2x Duplex 120V 20A (5-20R) GFCI; 1x 120V 30A (L5-30R); 1x 120/240V 30A (L14-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | 1850 Series™ OHV Engine | OHV 4-stroke |
| Engine Displacement | 420 | 358 |
| Runtime & fuel system | ||
| Runtime @ 50% Load (Gasoline) | 11 | 13.5 |
| 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 Protection | Yes | Yes |
| Carbon Monoxide Monitoring | Yes | Yes |
| Included equipment | ||
| Mobility Components | 10" Never Go Flat Wheels | Yes |
| Starting Components | Recoil | Not available |
| Documentation | operator's manual or illustrated parts list | Not available |
| Included Accessories | Extension cord and wheel kit | Tool kit and wheel kit |
| Warranty & identification | ||
| Residential Warranty | 2 | Not available |
| Commercial Warranty | 0.25 | Not available |
| Part Number | 030728 | EF55DZ1 |
| 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 Yamaha EF5500D is a 5500-watt generator designed for emergency backup, recreational use, and DIY projects. It features a 358cc OHV engine, dual voltage output, and offers up to 9 hours of continuous operation at rated load. |
- Most PowerfulBriggs & Stratton 30728 Storm Responder6250W running
- QuietestYamaha EF5500D74.1 dB
- Longest RuntimeYamaha EF5500D13.5h at 50% load
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Briggs & Stratton 30728 Storm Responder
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