Firman T04472
Generator · Tri-Fuel Portable Generator. Specs from the manufacturer page (checked ).

The Firman T04472 is a tri-fuel portable generator rated at 4,400 running watts and 5,500 starting watts. It runs on gasoline, propane (LPG), or natural gas. Its 5-gallon fuel tank provides up to 13 hours of runtime at 50% load.
Key features
- 4,400 running watts and 5,500 starting watts
- Tri-fuel: gasoline, propane (LPG), or natural gas
- Electric start and recoil start
- 5-gallon fuel tank, up to 13 hours of runtime at 50% load
- FIRMAN CO Alert shuts down the generator automatically if unsafe carbon monoxide levels are detected
- Outlets: 120V 20A duplex (5-20R), 120V 30A twist-lock (L5-30R), and 120V 30A TT-30R RV outlet
- Open-frame design
- Backed by a 3-year warranty
What it is for
- home projects
- RV trips
- camping
- outdoor power needs
Specifications
| Running watts | 4400 W |
|---|---|
| Peak / surge | 5500 W |
| Fuel | tri-fuel |
| Tank | 18.9 L (5.0 gal) |
| Run time at 50 % load | 13 h |
| CO shutoff | Yes |
| AC output voltage | 120V |
| Warranty | 3 years |
From the Firman page. Values the manufacturer does not publish are left out.
What is in the box
- Engine oil bottle
- Oil funnel
- Spark plug wrench
- Double open-ended wrench (10mm, 12mm)
- LPG regulator
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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.
Error codes and troubleshooting
| Code | Meaning | What to do | Manual page |
|---|---|---|---|
| Circuit Breakers | The receptacles are protected by an AC circuit protector that trips if the generator is overloaded or an external short circuit occurs. | Disconnect all electrical loads and determine the cause before using the generator again. If overloading caused the trip, reduce the load. Reset by pressing the protector button. Continuous tripping may damage the generator or equipment. | 8 |
| Oil Warning Indicator Light | Indicates the oil has fallen below the minimum level. The engine stops automatically and will not start until the proper amount of oil is in the crankcase. | Check the oil level when this light turns on. Add the proper amount of engine oil to the crankcase before attempting to start the engine. | 8 |
| Overload Indicator Light | Connected devices have exceeded the generator's wattage or amperage capacity, or a power surge occurred. The AC Power light goes off, the engine keeps running, and power to the receptacles is cut. | Keep the total power drawn from all receptacles within the nameplate rating. | 8 |
| Circuit Breaker | The receptacles are protected by an AC circuit protector that trips if the generator is overloaded or an external short circuit occurs. | Disconnect all electrical loads and find the cause before using the generator again. If overloading caused the trip, reduce the load. Reset by pressing the button on the protector. Continuous tripping may damage the generator or equipment. | 9 |
| Output Ready | Stays on during normal operation. Turns off when the generator is overloaded. | — | 9 |
| AC Reset | The inverter has entered a protective state and AC output is interrupted. | Press the AC Reset Button to restore the output. | 12 |
6 of 13 codes. From the Firman manual. All 13 WH03242 / T09371 / H07553 / W03083 codes →
FAQ
How long does the Firman T04472 run on a tank?
The maker rates it at 13 hours at 50 % load (about 2,200 W) on a 5.0-gal tank. A light load such as a refrigerator and lights runs longer; a full load runs shorter.
Can the Firman T04472 start a sump pump or well pump?
Starting surge matters more than running watts: this unit is rated 5500 W peak. That covers a typical 1/2 HP sump pump (about 2150 W to start). Use the calculator with your exact pump.