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 WH02942
- Genmax GM2800iAE
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 WH02942 | Genmax GM2800iAE |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Dual-Fuel | Gasoline |
| Inverter | Yes | Yes |
| Parallel capable | Yes | Yes |
| RV ready | Yes | Yes |
| Running watts | Winner: Winner: 2900 W | 2500 W |
| Starting watts | Winner: Winner: 3200 W | 2800 W |
| Noise (lower limit) | Winner: Winner: 58 dB | 62 dB |
| Weight | 90 lbs | Winner: Winner: 54 lbs |
| Run time @50% load | Not available | Not available |
| Run time @25% load | Winner: Winner: 10 h | Winner: Winner: 10 h |
| Fuel tank | 1.8 gal | 1.7 gal |
| Fuel gauge | No | Yes |
| Approx. dimensions (L × W × H) | 23.2 x 17.8 x 17.9 | 20.7 x 12.2 x 19.7 |
| Electrical | ||
| Voltage (AC) | 120 60 | 120 |
| Voltage (DC) | 12 | 5 |
| GFCI outlets | No | No |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | 3 % | 3 % |
| Engine | ||
| Engine | Firman Max-Pro Series OHV 4-stroke, cast iron sleeve | 145 cc Dinking OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric | Recoil, Electric, Remote |
| Warranty | ||
| Warranty | 3 years | 1 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 2900 W | 2500 W |
| Starting watts | 3200 W | 2800 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 | 10 h | 10 h |
| Propane | Not available | Not available |
| Running watts | 2600 W | Not available |
| Starting watts | 2900 W | Not available |
| 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 | 19 h | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | true |
| Compliance | CARB, EPA | EPA, ANSI/PGMA G300-2023 |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Floating | true |
| UPC | 840876130810 | Not available |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 2900 | 2500 |
| Running Watts (Propane) | 2600 | Not available |
| Starting Watts (Gasoline) | 3200 | 2800 |
| Starting Watts (Propane) | 2900 | Not available |
| Runtime @ 25% Load (Gasoline) | 10 | 10 |
| Runtime @ 25% Load (Propane) | 19 | Not available |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R); 1x 120V 30A (TT-30R) | 1x Duplex 120V 20A (5-20R) 1x 120V 30A (TT-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | OHV 4-stroke, cast iron sleeve | Dinking OHV 4-stroke |
| Engine Displacement | 171 | 145 |
| Cylinder Sleeve | Cast iron sleeve | Not available |
| Engine Oil Type | Not available | 10W-30 |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 10 | 10 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Not available |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | No | Yes |
| Included equipment | ||
| Starting Components | Recoil, Electric | Not available |
| Included Accessories | Oil, funnel, tool kit, battery charger, propane hose, and battery | Not available |
| Warranty & identification | ||
| Part Number | WH3200iE | Not available |
| Additional specs | ||
| Summary | The Firman WH02942 is a 2,900-watt dual-fuel inverter generator built for users who need portable power without sacrificing runtime flexibility. On gasoline, it delivers 2,900 running watts and 3,200 starting watts. Switch to propane and the running output drops to 2,600 watts, but runtime at 25% load stretches to 19 hours versus 10 hours on gas. This makes it a practical choice for RV owners, campers, and homeowners seeking backup power that can run all night on a single fuel source. The 3% THD output means laptops, phones, and sensitive electronics stay protected from power surges. At 58 dB, it runs quieter than most job sites and many competitors, making it suitable for campgrounds and residential areas. | The Genmax GM2800iAE is a 2800-watt gasoline inverter generator with CO Detect, suitable for emergency home power, outdoor activities, and RV use. Its inverter technology ensures clean power for sensitive electronics and it features multiple starting options for convenience. |
- Most PowerfulFirman WH029422900W running
- QuietestFirman WH0294258 dB
- Longest Runtimeh at 50% load
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Firman WH02942
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Genmax GM2800iAE
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