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- Generac #7678 GP3600
- Genmax GM5500XiD
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 #7678 GP3600 | Genmax GM5500XiD |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Dual-Fuel |
| Inverter | No | Yes |
| Parallel capable | No | Yes |
| RV ready | No | Yes |
| Running watts | 3600 W | Winner: Winner: 4000 W |
| Starting watts | 4500 W | Winner: Winner: 5500 W |
| Noise (lower limit) | 0 dB | Winner: Winner: 68 dB |
| Weight | 105 lbs | Winner: Winner: 68 lbs |
| Run time @50% load | Winner: Winner: 9.3 h | Not available |
| Run time @25% load | Not available | 11 h |
| Fuel tank | 3.7 gal | 2.2 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 24 x 22.5 x 21.3 | 23.1 x 18.5 x 17.8 |
| Electrical | ||
| Voltage (AC) | 120 | 120 |
| Voltage (DC) | Not available | 5 |
| GFCI outlets | No | No |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | Not available | ≤3% % |
| Engine | ||
| Engine | Generac OHV 4-stroke 212 | 160 cc OHV 4-stroke engine. |
| Alternator | Not available | Not available |
| Starting system | Recoil | Recoil |
| Warranty | ||
| Warranty | 3 years | 1 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 3600 W | 4000 W |
| Starting watts | 4500 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 | 9.3 h | 8 h |
| Run time @25% load | Not available | 11 h |
| Propane | Not available | Not available |
| Running watts | Not available | 3600 W |
| Starting watts | Not available | 4950 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 | 12.5 h |
| Run time @25% load | Not available | 17.5 h |
| Other | ||
| Data center | Not available | Not available |
| Indicators | false | true |
| Compliance | CARB | CARB, EPA, ANSI/PGMA G300-2023 |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Not available | Floating |
| UPC | 696471074581 | 860013299040 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 3600 | 4000 |
| Running Watts (Propane) | Not available | 3600 |
| Starting Watts (Gasoline) | 4500 | 5500 |
| Starting Watts (Propane) | Not available | 4950 |
| Runtime @ 50% Load (Gasoline) | 9.3 | 8 |
| Runtime @ 50% Load (Propane) | Not available | 12.5 |
| Runtime @ 25% Load (Gasoline) | Not available | 11 |
| Runtime @ 25% Load (Propane) | Not available | 17.5 |
| AC Outlet Types | 2x Duplex 120V 20A (5-20R) 1x 120V 30A (L5-30R) | 1x Duplex 120V 20A (5-20R); 1x 120V 30A (TT-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | OHV 4-stroke | OHV 4-stroke engine |
| Engine Displacement | 212 | 160 |
| Engine Oil Type | 10W-30 / SAE 30 | SAE 10W/30 |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | Not available | 11 |
| Runtime @ 50% Load (Gasoline) | 9.3 | 8 |
| Runtime @ 50% Load (Propane) | Not available | 12.5 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Low oil and overload protection |
| Low Oil Protection | Yes | No |
| Carbon Monoxide Monitoring | No | Yes |
| Included equipment | ||
| Mobility Components | Yes | Not available |
| Starting Components | Oil, funnel, tool kit, and wheel kit | Not available |
| Included Accessories | Oil, funnel, tool kit, and wheel kit | Oil, funnel, tool kit, propane hose, and wheel kit |
| Warranty & identification | ||
| Part Number | 7678 | Not available |
| Additional specs | ||
| Summary | The Generac GP3600 (#7678) is a 3600-watt gasoline generator built for homeowners and job sites needing reliable backup or portable power. Its 4500-watt peak capacity handles starting surges for tools and appliances, while the 3.7-gallon fuel tank delivers 9.3 hours of runtime at half load. Automatic voltage regulation protects sensitive electronics, and a three-year warranty covers ownership support. | The Genmax GM5500XiD is a 4000-watt dual-fuel inverter generator that handles essential household loads, power tools, and RV systems simultaneously. Running on gasoline or propane, it delivers clean 3% THD output safe for laptops and televisions. At 68 pounds with a wheel kit included, this unit moves easily between storage and deployment. |
- Most PowerfulGenmax GM5500XiD4000W running
- QuietestGenmax GM5500XiD68 dB
- Longest RuntimeGenerac #7678 GP36009.3h at 50% load
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Generac #7678 GP3600
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Genmax GM5500XiD
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