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| Specification | Generac #8251 GP2500i | Yamaha EF6300iSDE |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Gasoline |
| Inverter | Yes | Yes |
| Parallel capable | Yes | No |
| RV ready | No | No |
| Running watts | 2200 W | Winner: Winner: 5500 W |
| Starting watts | 2500 W | Winner: Winner: 6300 W |
| Noise (lower limit) | 0 dB | Winner: Winner: 58 dB |
| Weight | Winner: Winner: 48 lbs | 216 lbs |
| Run time @50% load | 4.5 h | Winner: Winner: 5 h |
| Run time @25% load | 8 h | 13.3 h |
| Fuel tank | 1 gal | 4.5 gal |
| Fuel gauge | No | Yes |
| Approx. dimensions (L × W × H) | 19.7 x 11.4 x 17.9 | 30.7 x 24.3 x 27.2 |
| Electrical | ||
| Voltage (AC) | 120 | 120/240 |
| Voltage (DC) | 12 | Not available |
| GFCI outlets | No | Yes |
| Covered outlets | Yes | No |
| Automatic Voltage Regulation | Yes | Yes |
| THD | Not available | <4.0% % |
| Engine | ||
| Engine | 98 cc OHV 4-stroke | 357 cc Yamaha MZ360 OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil | Electric |
| Warranty | ||
| Warranty | 3 years | 3 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 2200 W | 5500 W |
| Starting watts | 2500 W | 6300 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 | 4.5 h | Not available |
| Run time @25% load | 8 h | 13.3 h |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | true |
| Compliance | EPA, ANSI/PGMA G300-2023 | CARB, EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Not available | true |
| UPC | 696471003946 | 765053849371 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 2200 | 5500 |
| Starting Watts (Gasoline) | 2500 | 6300 |
| Runtime @ 50% Load (Gasoline) | 4.5 | Not available |
| Runtime @ 25% Load (Gasoline) | 8 | 13.3 |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R) | 1x Duplex 120V 20A (5-20R) GFCI; 1x 120V 30A (L5-30R); 1x 120/240V 30A (L14-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | 98 cc OHV 4-stroke | OHV 4-stroke |
| Engine Displacement | 98 | 357 |
| Engine Oil Type | 10W-30 | Not available |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 8 | 13.3 |
| Runtime @ 50% Load (Gasoline) | 4.5 | Not available |
| 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 | Recoil | Not available |
| Included Accessories | Oil, funnel, tool kit, and battery charging cables | Battery |
| Warranty & identification | ||
| Commercial Warranty | 3 | Not available |
| Part Number | 82512 | EF63ISDEX |
| Additional specs | ||
| Summary | The Generac GP2500i is a 2200-watt inverter generator built for portable backup power and recreational use. At 48 pounds, it moves easily between campsites, job sites, and emergency situations. The inverter technology means laptops, phones, and sensitive tools run safely because the power output stays stable. This unit runs on gasoline and delivers 2500 starting watts, so it can handle the initial surge when motors kick on. | The Yamaha EF6300iSDE is a powerful and advanced inverter generator, ideal for emergency backup, recreational use, and DIY projects. It offers a maximum output of 6300 watts and operates quietly between 58 to 64 decibels. |
