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.
- DuroMax XP12000HX
- Yamaha EF3000iS
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 | DuroMax XP12000HX | Yamaha EF3000iS |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Dual-Fuel | Gasoline |
| Inverter | No | Yes |
| Parallel capable | No | No |
| RV ready | Yes | No |
| Running watts | Winner: Winner: 9500 W | 2800 W |
| Starting watts | Winner: Winner: 12000 W | 3000 W |
| Noise (lower limit) | 74 dB | Winner: Winner: 54.5 dB |
| Weight | 230 lbs | Winner: Winner: 136 lbs |
| Run time @50% load | Winner: Winner: 9 h | Not available |
| Run time @25% load | 19 h | 18.6 h |
| Fuel tank | 8.3 gal | 3.4 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 29 x 30 x 26 | 26.8 x 17.5 x 21.9 |
| Electrical | ||
| Voltage (AC) | 120/240 | 120 |
| Voltage (DC) | Not available | Not available |
| GFCI outlets | Yes | No |
| Covered outlets | No | No |
| Automatic Voltage Regulation | Yes | Yes |
| THD | Not available | Not available |
| Engine | ||
| Engine | 457 cc OHV 4-stroke, cast iron sleeve | 171 cc Yamaha MZ175 OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric | Recoil |
| Warranty | ||
| Warranty | 5 years | 3 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 9500 W | 2800 W |
| Starting watts | 12000 W | 3000 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 h | Not available |
| Run time @25% load | 19 h | 18.6 h |
| Propane | Not available | Not available |
| Running watts | 9025 W | Not available |
| Starting watts | 11400 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 | 3.5 h | Not available |
| Run time @25% load | 7 h | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | true |
| Compliance | CARB, EPA | CARB, EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Not available | Floating |
| UPC | 811640016227 | 810856030645 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 9500 | 2800 |
| Running Watts (Propane) | 9025 | Not available |
| Starting Watts (Gasoline) | 12000 | 3000 |
| Starting Watts (Propane) | 11400 | Not available |
| Runtime @ 50% Load (Gasoline) | 9 | Not available |
| Runtime @ 50% Load (Propane) | 3.5 | Not available |
| Runtime @ 25% Load (Gasoline) | 19 | 18.6 |
| Runtime @ 25% Load (Propane) | 7 | Not available |
| AC Outlet Types | 2x Duplex 120V 20A (5-20R); 1x 120V 30A (L5-30R); 1x 120/240V 30A (L14-30R); 1x 120/240V 50A (14-50R) | AC outlets1x Duplex 120V 20A (5-20R)1x 120V 30A (L5-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | OHV 4-stroke | Yamaha MZ175 OHV 4-stroke |
| Engine Displacement | 457 | 171 |
| Cylinder Sleeve | Cast iron sleeve | Not available |
| Alternator Winding Material | Copper windings | Not available |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | 19 | 18.6 |
| Runtime @ 50% Load (Gasoline) | 9 | Not available |
| Runtime @ 50% Load (Propane) | 3.5 | 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, Electric | Not available |
| Included Accessories | Funnel, tool kit, propane hose, battery, and wheel kit | Battery charging cables |
| Warranty & identification | ||
| Residential Warranty | 5 | Not available |
| Commercial Warranty | 5 | 3 |
| Additional specs | ||
| Summary | The DuroMax XP12000HX is a 9,500-watt dual-fuel generator built for job sites, home backup, and RV use. Its 12,000-watt peak capacity handles the startup surge of air conditioners, compressors, and welders, while the 9,500-watt running output sustains multiple heavy tools or household circuits simultaneously. Gasoline delivers 19 hours of runtime at quarter load, making this unit suitable for extended outages or multi-day events without constant refueling.
The dual-fuel design means users can switch between gasoline and propane depending on fuel availability and storage constraints. On propane at 25% load, runtime drops to 7 hours, trading endurance for cleaner emissions and longer shelf life. The 457 cc cast iron engine is built for durability on job sites where generators take abuse. This is a stationary workhorse, not a portable grab-and-go unit. | The Yamaha EF3000iS is a 3000-watt inverter generator designed for quiet operation and portability, featuring advanced technologies like Smart Throttle and Noise Block, and backed by a 3-year limited warranty. |
- Most PowerfulDuroMax XP12000HX9500W running
- QuietestYamaha EF3000iS54.5 dB
- Longest RuntimeDuroMax XP12000HX9h at 50% load
Where to buy
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DuroMax XP12000HX
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Yamaha EF3000iS
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