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.
- Generac #7715 GP8000E
- NorthStar c15000s
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 | Generac #7715 GP8000E | NorthStar c15000s |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Gasoline |
| Inverter | No | No |
| Parallel capable | No | No |
| RV ready | No | No |
| Running watts | 8000 W | Winner: Winner: 13500 W |
| Starting watts | 10000 W | Winner: Winner: 15000 W |
| Noise (lower limit) | 0 dB | Winner: Winner: 73 dB |
| Weight | Winner: Winner: 198 lbs | 390 lbs |
| Run time @50% load | 10 h | Winner: Winner: 10.6 h |
| Run time @25% load | 15 h | Not available |
| Fuel tank | 7.9 gal | 12 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 27.2 x 27 x 26.5 | 43 x 36 x 35 |
| Electrical | ||
| Voltage (AC) | 120/240 | 120/240V 60 Hz |
| Voltage (DC) | Not available | Not available |
| GFCI outlets | Yes | Yes |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | Not available | <5% % |
| Engine | ||
| Engine | Generac OHV 4-stroke, 420 cc | 688 cc Honda GX690 OHV V-Twin |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric | Electric |
| Warranty | ||
| Warranty | 3 years | 4 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 8000 W | 13500 W |
| Starting watts | 10000 W | 15000 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 | 10 h | 10.6 h |
| Run time @25% load | 15 h | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | false | false |
| Compliance | EPA, ANSI/PGMA G300-2023 | CARB, EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Bonded to frame | true |
| UPC | 696471086225 | 840321737861 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 8000 | 13500 |
| Starting Watts (Gasoline) | 10000 | 15000 |
| Runtime @ 50% Load (Gasoline) | 10 | 10.6 |
| Runtime @ 25% Load (Gasoline) | 15 | Not available |
| AC Outlet Types | 2x Duplex 120V 20A (5-20R) GFCI1x 120/240V 30A (L14-30R) | 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 | Not available | Honda GX690 OHV V-Twin |
| Engine Displacement | 420 | 688 |
| Engine Oil Type | 10W-30 / SAE 30 | Not available |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 15 | Not available |
| Runtime @ 50% Load (Gasoline) | 10 | 10.6 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection, CO monitoring | Low oil and overload protection |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | Yes | Yes |
| Included equipment | ||
| Starting Components | Oil, battery, and wheel kit | Not available |
| Included Accessories | Oil, battery, and wheel kit | Funnel, battery, and wheel kit |
| Warranty & identification | ||
| Commercial Warranty | 3 | 4 |
| Part Number | 7715, 7686 | Not available |
| Additional specs | ||
| Summary | The Generac GP8000E is an 8,000-watt gasoline generator built for homeowners and contractors needing whole-house backup power or serious job site output. With 10,000 starting watts, it can handle the initial surge of air conditioners, well pumps, and power tools while running smaller loads continuously. The 7.9-gallon fuel tank delivers 15 hours at 25% load, meaning users can power essential devices through an entire night without refueling. | The NorthStar c15000s is a commercial-grade portable generator powered by a Honda GX690 OHV engine, delivering 15,000 surge watts and 13,500 rated watts. It features Quiet Armor Technology for reduced noise, a built-in battery charger/maintainer, and carbon monoxide detection with automatic shutdown for enhanced safety. |
- Most PowerfulNorthStar c15000s13500W running
- QuietestNorthStar c15000s73 dB
- Longest RuntimeNorthStar c15000s10.6h at 50% load
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Generac #7715 GP8000E
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NorthStar c15000s
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