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.
- NorthStar e18000s
- Yamaha EF5500DE
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 | NorthStar e18000s | Yamaha EF5500DE |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Gasoline |
| Inverter | No | No |
| Parallel capable | No | No |
| RV ready | No | No |
| Running watts | Winner: Winner: 15000 W | 4500 W |
| Starting watts | Winner: Winner: 18000 W | 5500 W |
| Noise (lower limit) | Winner: Winner: 74 dB | 74.1 dB |
| Weight | 423 lbs | Winner: Winner: 238.1 lbs |
| Run time @50% load | 7.9 h | Winner: Winner: 13.5 h |
| Run time @25% load | Not available | Not available |
| Fuel tank | 12 gal | 6.9 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 43 x 36 x 35 | 29.1 x 29 x 31.5 in |
| Electrical | ||
| Voltage (AC) | 120/240V 60 Hz | 120/240V 60 Hz |
| Voltage (DC) | Not available | Not available |
| GFCI outlets | Yes | Yes |
| Covered outlets | Yes | No |
| Automatic Voltage Regulation | Yes | Yes |
| THD | <5% % | Not available |
| Engine | ||
| Engine | 824 cc NorthStar e825 OHV 4-stroke | Yamaha MZ360 OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Electric | Recoil, Electric |
| Warranty | ||
| Warranty | 4 years | 3 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 15000 W | 4500 W |
| Starting watts | 18000 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 | 7.9 h | 13.5 h |
| Run time @25% load | Not available | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | false | true |
| Compliance | CARB, EPA | CARB, EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | true | true |
| UPC | 840321748058 | 765053823098 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 15000 | 4500 |
| Starting Watts (Gasoline) | 18000 | 5500 |
| Runtime @ 50% Load (Gasoline) | 7.9 | 13.5 |
| AC Outlet Types | 3x Duplex 120V 20A (5-20R) GFCI1x 120V 30A (L5-30R)1x 120/240V 30A (L14-30R)1x 120/240V 60A (14-60R) | 2x Duplex 120V 20A (5-20R) 1x 120V 30A (L5-30R)1x 120/240V 30A (L14-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | OHV 4-stroke | OHV 4-stroke |
| Engine Displacement | 824 | 358 |
| Runtime & fuel system | ||
| Runtime @ 50% Load (Gasoline) | 7.9 | 13.5 |
| Controls & display | ||
| Display Type | Not available | Data center |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Low oil and overload protection |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | Yes | Yes |
| Included equipment | ||
| Starting Components | Electric starting system | Not available |
| Documentation | Not available | Data center |
| Included Accessories | Funnel, battery, and wheel kit | Tool kit, battery, and wheel kit |
| Warranty & identification | ||
| Commercial Warranty | 4 | Not available |
| Part Number | Not available | EF55DEX |
| Additional specs | ||
| Summary | 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. | The Yamaha EF5500DE is a versatile dual 120/240 volt generator, ideal for emergency backup power for home, cottage, or business, as well as primary power on job sites. It features a 358cc OHV engine, electric start, and offers 5500 watts maximum AC output with outstanding fuel efficiency. |
- Most PowerfulNorthStar e18000s15000W running
- QuietestNorthStar e18000s74 dB
- Longest RuntimeYamaha EF5500DE13.5h at 50% load
Where to buy
Prices can change. We update these automatically.
NorthStar e18000s
Store links
No links yet.
Yamaha EF5500DE
Store links
No links yet.
Disclosure: Some links may be affiliate links. Specs and comparisons are never hidden.