FIRMAN WT03571 4125W Tri Fuel Inverter
A tri-fuel inverter generator rated at 3,300 running and 4,125 starting watts, with a 1.6-gallon tank and up to 8 hours of runtime at half load. It has an RV-ready TT-30R outlet and can run in parallel with a second unit.
- Running watts
- 3,300 W
- Starting / surge watts
- 4,125 W
- Fuel
- gasoline, propane, natural gas
- Best for
- RV trips and home backup for a fridge, lights and electronics, with clean power.
- Not for
- Whole-home backup or 240V appliances.
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Specifications
| Running watts | 3,300 W |
|---|---|
| Starting / surge watts | 4,125 W |
| Fuel | gasoline, propane, natural gas |
| Inverter (clean power) | Yes |
| Parallel capable | Yes |
| Runtime at 50% load | 8 h |
|---|---|
| Fuel tank | 1.6 gal |
| Outlets | 120V TT-30R (RV) |
|---|
Checked 29 October 2026. Sources: firmanpowerequipment.com.