The DuroMax 15,500 Watt Tri Fuel Portable HXT Generator (XP15500HXT) runs on 3 fuels; the other on 1. The DuroMax 15,500 Watt Tri Fuel Portable HXT Generator (XP15500HXT) is listed $401 lower. The DuroMax 15,500 Watt Tri Fuel Portable HXT Generator (XP15500HXT) is lighter (269 lb vs 390 lb).
Side by side
| Specification | DuroMax 15,500 Watt Tri Fuel Portable HXT Generator (XP15500HXT) | FIRMAN Gas Portable Generator 15000/12000W Electric Start 120/240V (P12002) |
|---|---|---|
| Brand | DuroMax | FIRMAN |
| Running watts | 12,000 W | 12,000 W |
| Starting watts | 15,500 W | 15,000 W |
| Fuel types | Gasoline, Propane, Natural gas | Gasoline |
| Fuel tank (gasoline) | 11.9 gal | — |
| Runtime (as stated) | up to 15.8 h | — |
| Noise (as stated) | 77 dB | — |
| Weight | 269 lb | 390 lb |
| Starting system | Electric/Recoil | — |
| Inverter | No | No |
| Carbon monoxide shutoff | Listed | Listed |
| Parallel capable | — | — |
| Warranty | 5 Years | — |
| Household appliances it can run by watts (calc) | 20 of 20 | 20 of 20 |
| Price per running watt (calc) | $0.22 | $0.25 |
| Price seen | $2,599 | $3,000 |
| Sellers | 1 | 1 |
Highlighted rows differ. Figures come from each product's sources; runtime, recharge and cost rows are Wattstanding calculations using the same method for both.
Which should you choose?
DuroMax 15,500 Watt Tri Fuel Portable HXT Generator (XP15500HXT)
Choose the DuroMax 15,500 Watt Tri Fuel Portable HXT Generator (XP15500HXT) if fuel flexibility matters or price decides it.
FIRMAN Gas Portable Generator 15000/12000W Electric Start 120/240V (P12002)
Choose the FIRMAN Gas Portable Generator 15000/12000W Electric Start 120/240V (P12002) if you prefer its maker, seller or ecosystem — the published figures do not favour it.
Before you buy either
- Total your loads with the appliance load & runtime calculator.
- Confirm what each seller includes — accessories, software trials and bundles change often.
- Read the limitations on each full reference page.
Wattstanding compares published specifications; we have not tested these products side by side. How we work · Disclosure