The DuroMax 15,000 Watt Electric Start Dual Fuel EFI Portable Generator runs on 2 fuels; the other on 1. The DuroMax 15,000 Watt Electric Start Dual Fuel EFI Portable Generator is listed $101 lower.
Side by side
| Specification | DuroMax 15,000 Watt Electric Start Dual Fuel EFI Portable Generator | FIRMAN Gas Portable Generator 15000/12000W Electric Start 120/240V (P12002) |
|---|---|---|
| Brand | DuroMax | FIRMAN |
| Running watts | 12,000 W | 12,000 W |
| Starting watts | 15,000 W | 15,000 W |
| Fuel types | Gasoline, Propane | Gasoline |
| Fuel tank (gasoline) | 8.3 gal | — |
| Runtime (as stated) | up to 17.9 h | — |
| Noise (as stated) | 74 dB | — |
| Weight | — | 390 lb |
| Starting system | Push Button | — |
| Inverter | No | No |
| Carbon monoxide shutoff | Listed | Listed |
| Parallel capable | — | — |
| Warranty | 5 Year | — |
| Household appliances it can run by watts (calc) | 20 of 20 | 20 of 20 |
| Price per running watt (calc) | $0.24 | $0.25 |
| Price seen | $2,899 | $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 15,000 Watt Electric Start Dual Fuel EFI Portable Generator
Choose the DuroMax 15,000 Watt Electric Start Dual Fuel EFI Portable Generator 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