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| Specification | Genmax GM10500XiT | Cat RP5500 |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Tri-Fuel | Gasoline |
| Inverter | Yes | No |
| Parallel capable | Yes | No |
| RV ready | Yes | No |
| Running watts | Winner: Winner: 7800 W | 5500 W |
| Starting watts | Winner: Winner: 10500 W | 6875 W |
| Noise (lower limit) | Winner: Winner: 74 dB | 0 dB |
| Weight | Winner: Winner: 123.5 lbs | 178 lbs |
| Run time @50% load | Not available | Winner: Winner: 15 h |
| Run time @25% load | 13.5 h | Not available |
| Fuel tank | 5.8 gal | 7.9 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 25.2 x 19.8 x 21.3 | 32.9 x 27.4 x 24.7 |
| Electrical | ||
| Voltage (AC) | 120/240 | 120/240 |
| Voltage (DC) | 12 | Not available |
| GFCI outlets | No | Yes |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | ≤3% % | Not available |
| Engine | ||
| Engine | 312 cc OHV 4-stroke | 300 cc OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric, Remote | Recoil |
| Warranty | ||
| Warranty | 1 years | 2 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 7800 W | 5500 W |
| Starting watts | 10500 W | 6875 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 | 15 h |
| Run time @25% load | 13.5 h | Not available |
| Natural gas | Not available | Not available |
| Running watts | 6250 W | Not available |
| Starting watts | 8500 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 | 7000 W | Not available |
| Starting watts | 8500 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 |
| 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 | Floating | Not available |
| UPC | 760790248388 | 815683020036 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 7800 | 5500 |
| Running Watts (Propane) | 7000 | Not available |
| Running Watts (Natural Gas) | 6250 | Not available |
| Starting Watts (Gasoline) | 10500 | 6875 |
| Starting Watts (Propane) | 8500 | Not available |
| Starting Watts (Natural Gas) | 8500 | Not available |
| Runtime @ 50% Load (Gasoline) | Not available | 15 |
| Runtime @ 25% Load (Gasoline) | 13.5 | Not available |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R) 1x 120/240V 30A (L14-30R) 1x 120/240V 50A (14-50R) | 2x Duplex 120V 20A (5-20R) GFCI, 1x 120/240V 30A (L14-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | 312 cc OHV 4-stroke | OHV 4-stroke |
| Engine Displacement | 312 | 300 |
| Engine Oil Type | SAE 10W/30 | SAE 30 or 10W-30 |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 13.5 | Not available |
| Runtime @ 50% Load (Gasoline) | Not available | 15 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Low oil and overload protection |
| Low Oil Protection | No | Yes |
| Carbon Monoxide Monitoring | Yes | No |
| Included equipment | ||
| Included Accessories | Funnel, tool kit, key fob, natural gas hose with NPT adapter, propane hose, cover, neutral bonding plug, battery, and wheel kit | Oil, funnel, tool kit, and wheel kit |
| Warranty & identification | ||
| Part Number | Not available | 502-3686 |
| Additional specs | ||
| Summary | The Genmax GM10500XiT is a 7,800-watt tri-fuel inverter generator delivering whole-house backup power and jobsite capability. Its tri-fuel design runs on gasoline, propane, or natural gas, eliminating fuel sourcing constraints during emergencies. The inverter technology maintains THD at 3% or below, making it safe for laptops, medical devices, and smart TVs. | The Cat RP5500 is a 5500-watt gasoline generator built for homeowners, contractors, and outdoor enthusiasts who need reliable backup power without the complexity of larger units. This wattage tier handles most household circuits simultaneously, meaning you can run a refrigerator, well pump, and power tools at the same time, but not your entire home's air conditioning system. The 6875-watt peak capacity gives it the muscle to start high-inrush devices like compressors and sump pumps without stalling. Because the RP5500 runs on gasoline, fuel is available at any gas station, eliminating the supply chain friction of propane or diesel models. The 7.9-gallon tank paired with 15-hour runtime at half load means you refuel roughly once per day under typical use, not every few hours. |