Cummins Onan P9500df
7500 W, dual-fuel
Firman T07573
Generator. Specs from the manufacturer page (checked ).
The Firman T07573 is a tri-fuel inverter generator rated at 7500 W running output and 9400 W starting output on gasoline. It runs on gas, liquid propane, or natural gas, with running output of 6750 W on LPG and 5500 W on natural gas. The page lists an 8-gallon tank and up to 12 hours of run time at 50% load.
View at Firman →Sponsored link; we may earn a commission.
Running
7500W
Peak / surge
9400W
Fuel
tri-fuel
Run time @50 %
12h
Weight
95.7kg
Warranty
3yr
Key features
- 439cc tri-fuel engine
- Running watts 7500W (gas), 6750W (LPG), 5500W (natural gas)
- Starting watts 9400W (gas), 8450W (LPG), 6900W (natural gas)
- Recoil start and electric start
- Low oil shutoff and CO Alert
- 8-gallon tank, up to 12 hours run time at 50% load
- Outlets: 5-20R 120V 20A duplex GFCI, L5-30R 120V 30A twistlock, L14-30R 120V/240V 30A twistlock, 14-50R 120V/240V 50A
Specifications
| Running watts | 7500 W |
|---|---|
| Peak / surge | 9400 W |
| Fuel | tri-fuel |
| Tank | 30.3 L (8.0 gal) |
| Run time at 50 % load | 12 h |
| AC output voltage | 120/240 volts |
| Weight | 95.7 kg (211.0 lb) |
| Warranty | 3 years |
From the Firman page. Values the manufacturer does not publish are left out.
Similar inverter & portable generators
WEN GN9500X
7500 W, gasoline
Westinghouse WGen7500c
7500 W, gasoline
Westinghouse WGen7500DF
7500 W, dual-fuel
DuroMax XP9500iH
7600 W, dual-fuel
DuroMax XP9500iHT
7600 W, tri-fuel
GenMax GM9000iED
7600 W, dual-fuel
Pulsar PGD95BISCO
7600 W, dual-fuel
Connection and wiring
Follow the diagrams in the Firman manual. Connecting to a home panel needs a transfer switch or interlock and a licensed electrician.
- Wiring diagram, manual page 2 →
- Wiring diagram, manual page 40 →
- Wiring diagram, manual page 41 →
- Wiring diagram, manual page 42 →
- Wiring diagram, manual page 43 →
Error codes and troubleshooting
We found no error-code table in this manual. Its troubleshooting section is the reference.
FAQ
How long does the Firman T07573 run on a tank?
The maker rates it at 12 hours at 50 % load (about 3,750 W) on a 8.0-gal tank. A light load such as a refrigerator and lights runs longer; a full load runs shorter.
Can the Firman T07573 start a sump pump or well pump?
Starting surge matters more than running watts: this unit is rated 9400 W peak. That covers a typical 1/2 HP sump pump (about 2150 W to start). Use the calculator with your exact pump.