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.
- Genmax GM5500i
- NorthStar c5500
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 | Genmax GM5500i | NorthStar c5500 |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Gasoline |
| Inverter | Yes | No |
| Parallel capable | No | No |
| RV ready | No | No |
| Running watts | Winner: Winner: 5000 W | 4500 W |
| Starting watts | Winner: Winner: 5500 W | Winner: Winner: 5500 W |
| Noise (lower limit) | Winner: Winner: 62 dB | 70 dB |
| Weight | Winner: Winner: 116.6 lbs | 227 lbs |
| Run time @50% load | 8.5 h | Winner: Winner: 15.1 h |
| Run time @25% load | 13 h | Not available |
| Fuel tank | 3.5 gal | 8 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 21.1 x 18.5 x 24 | 41 x 32 x 29 |
| Electrical | ||
| Voltage (AC) | 120/240 | 120/240 |
| Voltage (DC) | 5 | Not available |
| GFCI outlets | Yes | Yes |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | No | Yes |
| THD | ≤3% % | 5 % |
| Engine | ||
| Engine | 312 cc OHV 4-stroke | 270 cc Honda GX270 OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric | true |
| Warranty | ||
| Warranty | 1 years | 4 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 5000 W | 4500 W |
| Starting watts | 5500 W | 5500 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 | 8.5 h | 15.1 h |
| Run time @25% load | 13 h | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | false |
| Compliance | EPA, ANSI/PGMA G300-2023 | CARB, EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | true | true |
| UPC | 768494055455 | 840321737519 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 5000 | 4500 |
| Starting Watts (Gasoline) | 5500 | 5500 |
| Runtime @ 50% Load (Gasoline) | 8.5 | 15.1 |
| Runtime @ 25% Load (Gasoline) | 13 | Not available |
| AC Outlet Types | 2x Duplex 120V 20A (5-20R); 1x 120/240V 30A (L14-30R) | 3x Duplex 120V 20A (5-20R) GFCI1x 120/240V 30A (L14-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | Dinking OHV 4-stroke | OHV 4-stroke |
| Engine Displacement | 312 | 270 |
| Engine Oil Type | SAE 10W/30 | Not available |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 13 | Not available |
| Runtime @ 50% Load (Gasoline) | 8.5 | 15.1 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Low oil and overload protection |
| Low Oil Protection | No | Yes |
| Carbon Monoxide Monitoring | Yes | Yes |
| Included equipment | ||
| Included Accessories | Funnel, tool kit, and battery | Funnel and wheel kit |
| Warranty & identification | ||
| Commercial Warranty | Not available | 4 |
| Part Number | Not available | 1654400 |
| Additional specs | ||
| Summary | The Genmax GM5500i is a 5,000-watt gasoline inverter generator built around a 312cc OHV engine. It delivers enough continuous power for multiple household appliances, power tools, and sensitive electronics simultaneously. Because it uses inverter technology, the GM5500i produces power clean enough for laptops, gaming consoles, and medical devices, a trait that separates it from conventional open-frame generators at similar wattage levels. | The NorthStar c5500 is a commercial-grade portable generator designed for demanding job sites, featuring a Honda GX270 OHV engine and Quiet Armor Technology for reduced noise levels. |
- Most PowerfulGenmax GM5500i5000W running
- QuietestGenmax GM5500i62 dB
- Longest RuntimeNorthStar c550015.1h at 50% load
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Genmax GM5500i
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NorthStar c5500
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