Head to head
Firman T07571 Tri-Fuel vs Westinghouse WGen9500DF
Firman · Portable Generator
Firman T07571 Tri-Fuel
~$999
7,500 W / 9,400 W surge · up to well pump or a small central AC
Westinghouse · Portable Generator
Westinghouse WGen9500DF
~$1,049
9,500 W / 12,500 W surge · up to well pump or a small central AC
Quick takeThe Firman T07571 Tri-Fuel lists about $50 lower; the Westinghouse WGen9500DF puts out more sustained power (9,500 W).
| Spec | Firman T07571 Tri-Fuel | Westinghouse WGen9500DF |
|---|---|---|
| Approx. price | ~$999 | ~$1,049 |
| Type | Portable Generator | Portable Generator |
| Fuel | Tri Fuel (Gas/LP/NG) | Dual Fuel (Gas/Propane) |
| Running / output watts | 7,500 W | 9,500 W |
| Starting / surge watts | 9,400 W | 12,500 W |
| Battery capacity | — | — |
| Expandable to | — | — |
| Noise | 74 dB | 74 dB |
| Runtime | up to 12 hrs @ 25% load (8 gal gas); unlimited on NG hookup | 12 hrs @ 25% load (6.6 gal gas); ~7 hrs @ 50% on 20-lb propane |
| Outlets | 1x 120V 20A GFCI duplex (5-20R), 1x 120V 30A (L5-30R), 1x 120/240V 30A (L14-30R), 1x 120/240V 50A (14-50R) | 2x 120V 20A GFCI duplex (5-20R), 1x 120/240V 30A (L14-30R), 1x 120/240V 50A (14-50R) |
| Fuel tank | 8 gal | 6.6 gal |
| Weight | 213 lbs | 211 lbs |
| Transfer-switch ready | Yes | Yes |
| Warranty | 3-year limited | 3-year limited |
Highlighted cell is the better figure for that row.
Owner pros and cons
Firman T07571 Tri-Fuel
- +Cheapest credible tri-fuel path to NG-powered backup
- +LP and NG hoses included — no accessory hunt
- +50A 14-50R plus 30A outlets cover any transfer setup
- +Electric start with battery included
- +3-year warranty on paper, generous Costco returns in practice
- +Solid 213-lb frame with never-flat wheels
- −5,500W on natural gas is a steep derate
- −74 dB open-frame noise
- −Output sags at higher loads on NG in owner reports
- −Manual fuel-selection procedure trips up first-timers
Westinghouse WGen9500DF
- +Unmatched watts-per-dollar for whole-home backup
- +50A 14-50R plus 30A L14-30R feed any transfer setup
- +Remote electric start from inside the house
- +Dual fuel with easy switchover dial
- +12 hours per tank covers a full night
- −Loud — mid-70s dB under load, open-frame drone
- −Westinghouse support draws owner complaints
- −Occasional out-of-box electrical issues on new units
- −211 lbs; wheels help but stairs are out
- −Carburetor gums if stored with untreated fuel
- −~9% THD-class power, so owners debate whether electronics need a UPS