FIRMAN WT05571 6850W Tri Fuel Inverter
A tri-fuel inverter generator rated at 5,500 running and 6,850 starting watts. It shuts itself off if carbon monoxide builds up, has 120/240V output for a transfer switch and has an RV-ready TT-30R outlet. FIRMAN rates it at 67 dB(A).
- Running watts
- 5,500 W
- Starting / surge watts
- 6,850 W
- Fuel
- gasoline, propane, natural gas
- Best for
- Home backup through a transfer switch, including bigger loads, with clean power for electronics.
- Not for
- Indoor or garage use. Like every fuel-burning generator it must run outdoors, away from windows.
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Specifications
| Running watts | 5,500 W |
|---|---|
| Starting / surge watts | 6,850 W |
| Fuel | gasoline, propane, natural gas |
| Inverter (clean power) | Yes |
| Outlets | 120V TT-30R (RV), 120/240V L14-30R, 120/240V 14-50R, 120V 5-20R, 12V DC, USB |
|---|---|
| Transfer-switch ready | Yes |
| Noise | 67 dB(A) |
|---|---|
| Weight | 136.7 lb |
| CO safety shutoff | Yes |
|---|
Checked 29 October 2026. Sources: firmanpowerequipment.com.