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.
- Genmax GM15000ET
- Powerhorse s10500id
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 | Genmax GM15000ET | Powerhorse s10500id |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Tri-Fuel | Dual-Fuel |
| Inverter | No | Yes |
| Parallel capable | No | Yes |
| RV ready | Yes | No |
| Running watts | Winner: Winner: 13000 W | 8300 W |
| Starting watts | Winner: Winner: 15000 W | 10500 W |
| Noise (lower limit) | 76 dB | Winner: Winner: 62 dB |
| Weight | 242 lbs | Winner: Winner: 209.5 lbs |
| Run time @50% load | 11 h | Winner: Winner: 12 h |
| Run time @25% load | Not available | Not available |
| Fuel tank | 10.5 gal | 7.13 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 28 x 31.6 x 28.7 | 30 x 26.3 x 28.8 |
| Electrical | ||
| Voltage (AC) | 120/240 | 120/240V |
| Voltage (DC) | 12 | 5V |
| GFCI outlets | No | Yes |
| Covered outlets | Yes | Yes |
| Automatic Voltage Regulation | Yes | Yes |
| THD | 23 % | <3% % |
| Engine | ||
| Engine | 520 cc OHV 4-stroke | 457 cc OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil, Electric, Remote | Recoil, Electric, Remote |
| Warranty | ||
| Warranty | 1 years | 2 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 11000 W | 8300 W |
| Starting watts | 15000 W | 10500 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 | 11 h | 12 h |
| Run time @25% load | Not available | Not available |
| Natural gas | Not available | Not available |
| Running watts | 12000 W | Not available |
| Starting watts | 12000 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 | 13000 W | 7500 W |
| Starting watts | 13000 W | 9450 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 | 6 h |
| Run time @25% load | Not available | Not available |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | true |
| Compliance | EPA, ANSI/PGMA G300-2023 | EPA, ANSI/PGMA G300-2023 |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Floating | true |
| UPC | 760790901382 | 840321764003 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 11000 | 8300 |
| Running Watts (Propane) | 13000 | 7500 |
| Running Watts (Natural Gas) | 12000 | Not available |
| Starting Watts (Gasoline) | 15000 | 10500 |
| Starting Watts (Propane) | 13000 | 9450 |
| Starting Watts (Natural Gas) | 12000 | Not available |
| Runtime @ 50% Load (Gasoline) | 11 | 12 |
| Runtime @ 50% Load (Propane) | Not available | 6 |
| AC Outlet Types | AC outlets3x Duplex 120V 20A (5-20R)1x 120/240V 30A (L14-30R)1x 120/240V 50A (14-50R) | 1x Duplex 120V 20A (L5-20R) GFCI; 1x 120/240V 30A (L14-30R); 1x 120/240V 50A (14-50R); 1x 120/240V 50A (10-50R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | OHV 4-stroke | OHV 4-stroke |
| Engine Displacement | 520 | 457 |
| Engine Oil Type | SAE 10W/30 | Not available |
| Runtime & fuel system | ||
| Runtime @ 50% Load (Gasoline) | 11 | 12 |
| Runtime @ 50% Load (Propane) | Not available | 6 |
| 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 starter; Electric starter; Remote starter | Recoil, Electric, Remote |
| Included Accessories | Oil, funnel, tool kit, key fob, battery charger, natural gas hose with NPT adapter, propane hose, cover, neutral bonding plug, battery, and wheel kit | Funnel, tool kit, key fob, propane hose, and battery |
| Warranty & identification | ||
| Commercial Warranty | 1 | Not available |
| Additional specs | ||
| Summary | The Genmax GM15000ET is a 13,000-watt tri-fuel generator built for serious power demands. With 13,000 running watts and 15,000 starting watts, this unit can handle whole-house backup scenarios, including central air conditioning, refrigerators, well pumps, and multiple circuits running simultaneously. Because it runs on gasoline, propane, or natural gas, owners gain real flexibility during emergencies when one fuel source might be unavailable or during extended outages when tapping into a home natural gas line eliminates refueling trips entirely. | The Powerhorse s10500id is a dual-fuel inverter generator delivering 10,500 surge watts and 8,300 rated watts, suitable for emergency home backup, RVs, and worksites. |
- Most PowerfulGenmax GM15000ET13000W running
- QuietestPowerhorse s10500id62 dB
- Longest RuntimePowerhorse s10500id12h at 50% load
Where to buy
Prices can change. We update these automatically.
Genmax GM15000ET
Store links
No links yet.
Powerhorse s10500id
Store links
No links yet.
Disclosure: Some links may be affiliate links. Specs and comparisons are never hidden.