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| Specification | Genmax GM2200i | Cat RP6500 E |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Gasoline |
| Inverter | Yes | No |
| Parallel capable | Yes | No |
| RV ready | No | No |
| Running watts | 1800 W | Winner: Winner: 6500 W |
| Starting watts | 2200 W | Winner: Winner: 8125 W |
| Noise (lower limit) | Winner: Winner: 58 dB | 0 dB |
| Weight | Winner: Winner: 41.9 lbs | 202 lbs |
| Run time @50% load | 6 h | Winner: Winner: 12 h |
| Run time @25% load | 8 h | Not available |
| Fuel tank | 1 gal | 7.9 gal |
| Fuel gauge | No | Yes |
| Approx. dimensions (L × W × H) | 18.9 x 11.4 x 17.3 | 32.9 x 27.4 x 24.7 |
| Electrical | ||
| Voltage (AC) | 120 | 120/240 |
| Voltage (DC) | 5 | Not available |
| GFCI outlets | No | Yes |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | <3% % | Not available |
| Engine | ||
| Engine | 79.7 cc Dinking OHV 4-stroke | 420 cc OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil | Recoil, Electric |
| Warranty | ||
| Warranty | 1 years | 2 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 1800 W | 6500 W |
| Starting watts | 2200 W | 8125 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 | 6 h | 12 h |
| Run time @25% load | 8 h | 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 | Not available | true |
| UPC | 738349925141 | 815683020067 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 1800 | 6500 |
| Starting Watts (Gasoline) | 2200 | 8125 |
| Runtime @ 50% Load (Gasoline) | 6 | 12 |
| Runtime @ 25% Load (Gasoline) | 8 | Not available |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R) | 2x Duplex 120V 20A (5-20R); 1x 120/240V 30A (L14-30R); 1x 120V 30A (L5-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | Dinking OHV 4-stroke | OHV 4-stroke |
| Engine Displacement | 79.7 | 420 |
| Engine Oil Type | 10W-30 | SAE 30 or 10W-30 |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 8 | Not available |
| Runtime @ 50% Load (Gasoline) | 6 | 12 |
| 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 | No |
| Included equipment | ||
| Starting Components | Not available | Recoil, Electric |
| Included Accessories | Funnel and tool kit | Oil, funnel, tool kit, battery, and wheel kit |
| Warranty & identification | ||
| Part Number | Not available | 502-3688 |
| Additional specs | ||
| Summary | The GENMAX GM2200i is a 2200-watt gasoline inverter generator featuring a 79.7cc engine, CO detection, and parallel capability, designed for quiet and efficient power supply. | The Cat RP6500 E is a 6500-watt gasoline generator built for residential backup and light commercial work. Its 8125-watt peak capacity means it can start large tools and appliances that draw high inrush current, then sustain 6500 watts of continuous power for multiple devices simultaneously. A 7.9-gallon fuel tank delivers 12 hours of runtime at 50% load, which translates to roughly one full workday or overnight backup without refueling. The gasoline engine is straightforward to maintain and refuel anywhere, making this unit practical for job sites, outdoor events, and emergency home power. |