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.
- Firman H05751
- Pulsar PG6580BCO
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 | Firman H05751 | Pulsar PG6580BCO |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Dual-Fuel | Dual-Fuel |
| Inverter | No | No |
| Parallel capable | No | No |
| RV ready | No | Yes |
| Running watts | Winner: Winner: 5700 W | 5300 W |
| Starting watts | Winner: Winner: 7125 W | 6580 W |
| Noise (lower limit) | Winner: Winner: 74 dB | 75 dB |
| Weight | 194.5 lbs | Winner: Winner: 143.5 lbs |
| Run time @50% load | Winner: Winner: 12 h | 10 h |
| Run time @25% load | Not available | Not available |
| Fuel tank | 8 gal | 5.3 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 30.2 x 27.5 x 26.3 | 23.3 x 20 x 18.6 |
| Electrical | ||
| Voltage (AC) | 120/240V 60 Hz | 120/240 |
| Voltage (DC) | Not available | Not available |
| GFCI outlets | Yes | Yes |
| Covered outlets | Yes | No |
| Automatic Voltage Regulation | Yes | Yes |
| THD | 25 % | Not available |
| Engine | ||
| Engine | Firman Max-Pro Series OHV 4-stroke, cast iron sleeve | OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric | Not available |
| Warranty | ||
| Warranty | 3 years | 2 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 5700 W | 5300 W |
| Starting watts | 7125 W | 6580 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 | 10 h |
| Run time @25% load | Not available | Not available |
| Propane | Not available | Not available |
| Running watts | Not available | 4750 W |
| Starting watts | Not available | 5922 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 | 6 h |
| Run time @25% load | Not available | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | false | false |
| Compliance | CARB, EPA | CARB, EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | true | Not available |
| UPC | 840876157510 | Not available |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 5700 | 5300 |
| Running Watts (Propane) | Not available | 4750 |
| Starting Watts (Gasoline) | 7125 | 6580 |
| Starting Watts (Propane) | Not available | 5922 |
| Runtime @ 50% Load (Gasoline) | 12 | 10 |
| Runtime @ 50% Load (Propane) | Not available | 6 |
| AC Outlet Types | 2x Duplex 120V 20A (5-20R) GFCI; 1x 120V 30A (L5-30R); 1x 120/240V 30A (L14-30R) | 1x Duplex 120V 20A (5-20R) GFCI; 1x 120V 30A (TT-30R); 1x 120/240V 30A (L14-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | Max-Pro Series OHV 4-stroke | OHV 4-stroke |
| Engine Displacement | 439 | 274 |
| Cylinder Sleeve | cast iron sleeve | Not available |
| Engine Oil Type | Not available | 10W-30 |
| Runtime & fuel system | ||
| Runtime @ 50% Load (Gasoline) | 12 | 10 |
| Runtime @ 50% Load (Propane) | Not available | 6 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Low oil and overload protection |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | No | Yes |
| Included equipment | ||
| Included Accessories | Oil, funnel, tool kit, propane hose, battery, and wheel kit | Oil, funnel, tool kit, propane hose, and wheel kit |
| Warranty & identification | ||
| Commercial Warranty | 3 | 2 |
| Additional specs | ||
| Summary | The Firman H05751 is a 5,700-watt dual-fuel generator that bridges residential backup and jobsite work. At this wattage, you can run a refrigerator, sump pump, and several household circuits simultaneously, or power mid-range tools like circular saws and air compressors, but not both at once. The dual-fuel design lets you switch between gasoline and propane depending on fuel availability, which matters during emergencies when one source may be scarce. At 194.5 pounds with an included wheel kit, this is a stationary or two-person portable unit. The 8-gallon tank delivers 12 hours at 50% load, meaning one full day of moderate use before refueling. | The Pulsar PG6580BCO is a 6,580-watt dual-fuel portable generator equipped with CO Alert technology, offering reliable power for home backup, job sites, and outdoor activities. |
- Most PowerfulFirman H057515700W running
- QuietestFirman H0575174 dB
- Longest RuntimeFirman H0575112h at 50% load
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Firman H05751
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