FIRMAN WT06873 8500W Tri Fuel Inverter
A tri-fuel inverter generator rated at 6,800 running and 8,500 starting watts, with a 5.3-gallon tank and up to 14 hours of runtime at 25% load. It shuts itself off if carbon monoxide builds up, has 120/240V output for a transfer switch and can run in parallel with a second unit.
- Running watts
- 6,800 W
- Starting / surge watts
- 8,500 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.
Paid link: we may earn a commission if you buy through it, at no extra cost to you.
Specifications
| Running watts | 6,800 W |
|---|---|
| Starting / surge watts | 8,500 W |
| Fuel | gasoline, propane, natural gas |
| Inverter (clean power) | Yes |
| Parallel capable | Yes |
| Runtime at 25% load | 14 h |
|---|---|
| Fuel tank | 5.3 gal |
| Outlets | 12V DC, USB |
|---|
| CO safety shutoff | Yes |
|---|
Checked 29 October 2026. Sources: firmanpowerequipment.com.