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 GM17000iETC
- NorthStar e18000s
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 GM17000iETC | NorthStar e18000s |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Tri-Fuel | Gasoline |
| Inverter | Yes | No |
| Parallel capable | No | No |
| RV ready | Yes | No |
| Running watts | 13500 W | Winner: Winner: 15000 W |
| Starting watts | 17000 W | Winner: Winner: 18000 W |
| Noise (lower limit) | Winner: Winner: 63 dB | 74 dB |
| Weight | Winner: Winner: 313 lbs | 423 lbs |
| Run time @50% load | Not available | Winner: Winner: 7.9 h |
| Run time @25% load | 14 h | Not available |
| Fuel tank | 10.5 gal | 12 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 33.1 x 31.3 x 33.5 | 43 x 36 x 35 |
| Electrical | ||
| Voltage (AC) | 120/240V 60 Hz | 120/240V 60 Hz |
| Voltage (DC) | 12 | Not available |
| GFCI outlets | No | Yes |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | 3 % | <5% % |
| Engine | ||
| Engine | 760 cc OHV V-Twin. | 824 cc NorthStar e825 OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Electric, Remote | Electric |
| Warranty | ||
| Warranty | 1 years | 4 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 13500 W | 15000 W |
| Starting watts | 17000 W | 18000 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 | 7.9 h |
| Run time @25% load | 14 h | Not available |
| Natural gas | Not available | Not available |
| Running watts | 10800 W | Not available |
| Starting watts | 10800 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 | Not available | Not available |
| Propane | Not available | Not available |
| Running watts | 12500 W | Not available |
| Starting watts | 15000 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 | 4.5 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 | Not available | true |
| UPC | 752671930901 | 840321748058 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 13500 | 15000 |
| Running Watts (Propane) | 12500 | Not available |
| Running Watts (Natural Gas) | 10800 | Not available |
| Starting Watts (Gasoline) | 17000 | 18000 |
| Starting Watts (Propane) | 15000 | Not available |
| Starting Watts (Natural Gas) | 10800 | Not available |
| Runtime @ 50% Load (Gasoline) | Not available | 7.9 |
| Runtime @ 25% Load (Gasoline) | 14 | Not available |
| Runtime @ 25% Load (Propane) | 4.5 | Not available |
| AC Outlet Types | 2x Duplex 120V 20A (5-20R); 1x 120/240V 30A (L14-30R); 2x 120/240V 50A (14-50R) | 3x Duplex 120V 20A (5-20R) GFCI1x 120V 30A (L5-30R)1x 120/240V 30A (L14-30R)1x 120/240V 60A (14-60R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | OHV V-Twin | OHV 4-stroke |
| Engine Displacement | 760 | 824 |
| Engine Oil Type | SAE 10W/30 | Not available |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 14 | Not available |
| Runtime @ 50% Load (Gasoline) | Not available | 7.9 |
| 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 | ||
| Starting Components | Not available | Electric starting system |
| Included Accessories | Oil, funnel, tool kit, key fob, battery charger, natural gas hose with NPT adapter, propane hose, cover, neutral bonding plug, and battery | Funnel, battery, and wheel kit |
| Warranty & identification | ||
| Residential Warranty | 1 | Not available |
| Commercial Warranty | 1 | 4 |
| Additional specs | ||
| Summary | The Genmax GM17000iETC is a 13,500-watt tri-fuel inverter generator that delivers whole-house backup power or heavy-duty worksite capacity. Running on gasoline, propane, or natural gas gives owners real flexibility when traditional fuel sources are unavailable or delayed during extended outages. The 3% THD output keeps laptops, medical devices, and home theater systems safe from power distortion that conventional generators cause. | The NorthStar e18000s is a commercial-grade EFI portable generator with electric start, delivering 18,000 surge watts and 15,000 rated watts. It features a NorthStar e825 OHV EFI engine, Quiet Armor Technology for reduced noise, and a heavy-duty steel exoskeleton for durability. |
- Most PowerfulNorthStar e18000s15000W running
- QuietestGenmax GM17000iETC63 dB
- Longest RuntimeNorthStar e18000s7.9h at 50% load
Where to buy
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Genmax GM17000iETC
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NorthStar e18000s
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