Select up to 4 generators to compare specs, power output, noise levels, runtime and more. Your compare URL is shareable.
| Specification | Firman P03631 | Generac #8150 GP5500E |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Gasoline |
| Inverter | No | No |
| Parallel capable | No | No |
| RV ready | Yes | No |
| Running watts | 3650 W | Winner: Winner: 5500 W |
| Starting watts | 4450 W | Winner: Winner: 6875 W |
| Noise (lower limit) | Winner: Winner: 75 dB | 0 dB |
| Weight | Winner: Winner: 119.5 lbs | 163 lbs |
| Run time @50% load | Winner: Winner: 14 h | 10.5 h |
| Run time @25% load | Not available | 13.4 h |
| Fuel tank | 5 gal | 5.4 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 24.8 x 21.7 x 21.7 | 30 x 27 x 25 |
| Electrical | ||
| Voltage (AC) | 120/240 | 120/240 |
| Voltage (DC) | 12 | Not available |
| GFCI outlets | Yes | Yes |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | <25% % | Not available |
| Engine | ||
| Engine | 208 cc Firman Max-Pro Series OHV 4-stroke, cast iron sleeve | Generac OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric, Remote | Recoil, Electric |
| Warranty | ||
| Warranty | 3 years | 2 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 3650 W | 5500 W |
| Starting watts | 4450 W | 6875 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 | 14 h | 10.5 h |
| Run time @25% load | Not available | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | false |
| Compliance | CARB, EPA, ANSI/PGMA G300-2023 | CARB, EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | true | true |
| UPC | 840876136317 | 696471104639 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 3650 | 5500 |
| Starting Watts (Gasoline) | 4450 | 6875 |
| Runtime @ 50% Load (Gasoline) | 14 | 10.5 |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R) GFCI; 1x 120V 30A (TT-30R); 1x 120/240V 30A (L14-30R) | 2x Duplex 120V 20A (5-20R) GFCI1x 120/240V 30A (L14-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | 208 cc Firman Max-Pro Series OHV 4-stroke, cast iron sleeve | OHV 4-stroke |
| Engine Displacement | 208 | 298 |
| Cylinder Sleeve | cast iron sleeve | Not available |
| Engine Oil Type | Not available | 5W-30 |
| Runtime & fuel system | ||
| Runtime @ 50% Load (Gasoline) | 14 | 10.5 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Low oil and overload protection |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | Yes | Yes |
| Included equipment | ||
| Mobility Components | Yes | Yes |
| Starting Components | Not available | Recoil, Electric |
| Included Accessories | Oil, funnel, tool kit, key fob, battery, and wheel kit | Oil, Funnel, Tool Kit, Battery, and Wheel Kit |
| Warranty & identification | ||
| Commercial Warranty | 3 | 2 |
| Part Number | Not available | 8150 |
| Additional specs | ||
| Summary | The Firman P03631 is a 3,650-watt gasoline generator built for homeowners, RV users, and outdoor enthusiasts who need reliable backup power without breaking portability limits. At this wattage, the unit can run a refrigerator, microwave, and several power tools simultaneously, or power an RV's air conditioning and appliances during camping trips. The 4,450-watt peak capacity handles the startup surge of compressors and air conditioners, which draw 2 to 3 times their running wattage on initial startup.
The P03631 delivers 14 hours of runtime at 50% load from its 5-gallon tank, meaning a user can power essential devices through a full day and night without refueling. This runtime window makes it practical for weekend camping or a 24-hour power outage without the need for a second fuel run. The gasoline fuel type keeps refueling simple at any gas station, and the inclusion of a fuel gauge eliminates guesswork about tank level. | The Generac GP5500E is a 5,500 watt gasoline generator built to power whole house essentials during outages or on job sites. Its 6,875 starting watts handle motor driven appliances like well pumps and air conditioners that demand heavy inrush current. For homeowners and contractors who want reliable backup without crossing into stationary generator territory, the GP5500E delivers meaningful output with the refueling simplicity of gasoline. |