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 W03383
- Genmax GM4600iAEFIC
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 @25%
h
Running watts by fuel
Shows how output changes across gasoline/propane/natural gas (when available).
| Specification | Firman W03383 | Genmax GM4600iAEFIC |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Gasoline |
| Inverter | Yes | Yes |
| Parallel capable | Yes | Yes |
| RV ready | Yes | Yes |
| Running watts | 3300 W | Winner: Winner: 3800 W |
| Starting watts | 3650 W | Winner: Winner: 4600 W |
| Noise (lower limit) | Winner: Winner: 58 dB | 63 dB |
| Weight | 91 lbs | Winner: Winner: 58.4 lbs |
| Run time @50% load | Not available | Not available |
| Run time @25% load | Winner: Winner: 9 h | Winner: Winner: 9 h |
| Fuel tank | 1.8 gal | 1.6 gal |
| Fuel gauge | No | Yes |
| Approx. dimensions (L × W × H) | 23.2 x 17.8 x 17.9 | 20.9 x 12.2 x 19.7 |
| Electrical | ||
| Voltage (AC) | 120 | 120 |
| Voltage (DC) | 12 | 12 |
| GFCI outlets | No | No |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | <3% % | 5 % |
| Engine | ||
| Engine | 193 cc Firman Max-Pro Series OHV 4-stroke, cast iron sleeve | 159 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 | 3800 W |
| Starting watts | 3650 W | 4600 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 | 9 h |
| 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 | true |
| UPC | 840876133835 | Not available |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 3300 | 3800 |
| Starting Watts (Gasoline) | 3650 | 4600 |
| Runtime @ 25% Load (Gasoline) | 9 | 9 |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R)1x 120V 30A (TT-30R) | AC outlets1x Duplex 120V 20A (5-20R)1x 120V 30A (TT-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | OHV 4-stroke | OHV 4-stroke |
| Engine Displacement | 193 | 159 |
| Cylinder Sleeve | cast iron sleeve | Not available |
| Engine Oil Type | Not available | SAE 0W-30 |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 9 | 9 |
| Safety & compliance | ||
| Low Oil Protection | Yes | No |
| Carbon Monoxide Monitoring | No | Yes |
| Included equipment | ||
| Included Accessories | Oil, funnel, tool kit, key fob, battery charger, battery charging cables, and battery | Not available |
| Additional specs | ||
| Summary | The Firman W03383 is a 3300-watt inverter generator built around a 193cc OHV 4-stroke engine with a cast iron sleeve. At this wattage, it can run a refrigerator, microwave, and several lights simultaneously, or power essential household circuits during an outage. The inverter technology keeps total harmonic distortion below 3%, which protects laptops, smartphones, and other sensitive electronics from voltage spikes. This unit bridges the gap between lightweight portables and mid-range backup power, making it useful for both recreational trips and emergency home backup. | The Genmax GM4600iAEFIC is a 3800-watt gasoline inverter generator built for users who need portable power without sacrificing output control. Its 4600-watt peak capacity handles startup surges, while the inverter design keeps electricity clean enough for laptops and sensitive devices. One person can move it. |
- Most PowerfulGenmax GM4600iAEFIC3800W running
- QuietestFirman W0338358 dB
- Longest Runtimeh at 50% load
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Firman W03383
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