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| Specification | Firman W03383 | Genmax GM10500iETC |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Tri-Fuel |
| Inverter | Yes | Yes |
| Parallel capable | Yes | Yes |
| RV ready | Yes | Yes |
| Running watts | 3300 W | Winner: Winner: 8500 W |
| Starting watts | 3650 W | Winner: Winner: 10500 W |
| Noise (lower limit) | Winner: Winner: 58 dB | 64 dB |
| Weight | Winner: Winner: 91 lbs | 244.7 lbs |
| Run time @50% load | Not available | Not available |
| Run time @25% load | 9 h | Winner: Winner: 14 h |
| Fuel tank | 1.8 gal | 6.9 gal |
| Fuel gauge | No | Yes |
| Approx. dimensions (L × W × H) | 23.2 x 17.8 x 17.9 | 30.9 x 22.6 x 29.3 |
| Electrical | ||
| Voltage (AC) | 120 | 120/240 |
| Voltage (DC) | 12 | 12 |
| GFCI outlets | No | No |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | <3% % | ≤3% % |
| Engine | ||
| Engine | 193 cc Firman Max-Pro Series OHV 4-stroke, cast iron sleeve | 458 cc OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric, Remote | Recoil, Electric, Remote |
| Warranty | ||
| Warranty | 3 years | 1 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 3300 W | 8500 W |
| Starting watts | 3650 W | 10500 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 | 9 h | 14 h |
| Natural gas | Not available | Not available |
| Running watts | Not available | 6800 W |
| Starting watts | Not available | 8400 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 |
| Propane | Not available | Not available |
| Running watts | Not available | 8000 W |
| Starting watts | Not available | 9500 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 | CARB, EPA | CARB, EPA, ANSI/PGMA G300-2023 |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Not available | Floating |
| UPC | 840876133835 | 742332650842 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 3300 | 8500 |
| Running Watts (Propane) | Not available | 8000 |
| Running Watts (Natural Gas) | Not available | 6800 |
| Starting Watts (Gasoline) | 3650 | 10500 |
| Starting Watts (Propane) | Not available | 9500 |
| Starting Watts (Natural Gas) | Not available | 8400 |
| Runtime @ 25% Load (Gasoline) | 9 | 14 |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R)1x 120V 30A (TT-30R) | 2x Duplex 120V 20A (5-20R); 1x 120/240V 30A (L14-30R); 1x 120/240V 50A (14-50R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | OHV 4-stroke | 458 cc OHV 4-stroke |
| Engine Displacement | 193 | 458 |
| Cylinder Sleeve | cast iron sleeve | Not available |
| Engine Oil Type | Not available | SAE 10W/30 |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 9 | 14 |
| Safety & compliance | ||
| Overload Protection System | Not available | Low oil and overload protection |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | No | Yes |
| Included equipment | ||
| Starting Components | Not available | Recoil, Electric, Remote |
| Included Accessories | Oil, funnel, tool kit, key fob, battery charger, battery charging cables, and battery | Funnel, tool kit, key fob, battery charger, natural gas hose with NPT adapter, propane hose, RV adapter, cover, neutral bonding plug, and battery |
| Warranty & identification | ||
| Residential Warranty | Not available | 1 |
| Commercial Warranty | Not available | 1 |
| Additional specs | ||
| Summary | The Firman W03383 supplies 3,300 running watts for household essentials, RV loads, and campsite equipment. Its inverter keeps THD below 3%, making the output suitable for laptops, televisions, and other sensitive electronics. A TT-30R outlet serves 30-amp RV connections directly, while remote, electric, and recoil starting give owners three ways to get power running. | The Genmax GM10500iETC is an 8500-watt tri-fuel inverter generator that runs on gasoline, propane, or natural gas. This wattage handles mid-to-large loads like air conditioning units, power tools, and multiple household appliances simultaneously. The tri-fuel flexibility means users can switch fuels based on availability and cost, a significant advantage for both emergency backup and remote work sites. |
