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.
- Honda EM6500SX
- Cat RP6500 E
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 | Honda EM6500SX | Cat RP6500 E |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Gasoline |
| Inverter | No | No |
| Parallel capable | No | No |
| RV ready | No | No |
| Running watts | 5500 W | Winner: Winner: 6500 W |
| Starting watts | 6500 W | Winner: Winner: 8125 W |
| Noise (lower limit) | Winner: Winner: 64 dB | 0 dB |
| Weight | 231.7 lbs | Winner: Winner: 202 lbs |
| Run time @50% load | 9.8 h | Winner: Winner: 12 h |
| Run time @25% load | Not available | Not available |
| Fuel tank | 6.2 gal | 7.9 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 41.4 x 27.8 x 28.3 | 32.9 x 27.4 x 24.7 |
| Electrical | ||
| Voltage (AC) | 120/240 | 120/240 |
| Voltage (DC) | 12 | Not available |
| GFCI outlets | Yes | Yes |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | Not available | Not available |
| Engine | ||
| Engine | Honda iGX390 OHV 4-stroke, cast iron sleeve | 420 cc OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric, Remote | Recoil, Electric |
| Warranty | ||
| Warranty | 3 years | 2 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 5500 W | 6500 W |
| Starting watts | 6500 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 | 9.8 h | 12 h |
| Run time @25% load | Not available | 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 | Floating | true |
| UPC | 786102007429 | 815683020067 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 5500 | 6500 |
| Starting Watts (Gasoline) | 6500 | 8125 |
| Runtime @ 50% Load (Gasoline) | 9.8 | 12 |
| AC Outlet Types | AC outlets2x Duplex 120V 20A (5-20R) GFCI1x 120V 30A (L5-30R)1x 120/240V 30A (L14-30R) | 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 | Honda iGX390 OHV 4-stroke, cast iron sleeve | OHV 4-stroke |
| Engine Displacement | 389 | 420 |
| Cylinder Sleeve | Cast iron sleeve | Not available |
| Engine Oil Type | 10W-30 | SAE 30 or 10W-30 |
| Runtime & fuel system | ||
| Runtime @ 50% Load (Gasoline) | 9.8 | 12 |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Low oil and overload protection |
| Low Oil Protection | Yes | Yes |
| Carbon Monoxide Monitoring | Yes | No |
| Included equipment | ||
| Starting Components | Recoil, Electric, Remote | Recoil, Electric |
| Included Accessories | Battery and wheel kit | Oil, funnel, tool kit, battery, and wheel kit |
| Warranty & identification | ||
| Commercial Warranty | 3 | Not available |
| Part Number | EM6500SXK2AN | 502-3688 |
| Additional specs | ||
| Summary | The Honda EM6500SX is a 6500-watt generator equipped with an electric start, Bluetooth capability, and CO-MINDER for advanced carbon monoxide detection. It offers a long run time of up to 9.8 hours and can power a variety of household appliances. | 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. |
- Most PowerfulCat RP6500 E6500W running
- QuietestHonda EM6500SX64 dB
- Longest RuntimeCat RP6500 E12h at 50% load
Where to buy
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Honda EM6500SX
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Cat RP6500 E
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