Generac iQ5200
3900 W, dual-fuel
Firman P03504
Generator · Performance Series. Specs from the manufacturer page (checked ).
The Firman P03504 is a gasoline portable generator with 3550 running watts and 4450 starting watts, powered by a 208cc engine. It outputs 120 volts and is sold with a 5-gallon steel fuel tank that runs up to 14 hours at 50% load. The page describes it as RV ready.
Check on Amazon →Sponsored link; we may earn a commission.
Running
3550W
Peak / surge
4450W
Fuel
gasoline
Run time @50 %
14h
Noise
75dB
CO shutoff
Yes
Weight
49kg
Warranty
3yr
Key features
- 208cc engine with recoil start
- Low oil shutoff and CO Alert Technology
- Up to 14 hours of run time at 50% load
- 5-gallon steel tank with fuel gauge
- Outlets: one 5-20R 120V 20A duplex, plus L5-30R and TT-30R 120V 30A twistlock, each rated 29.6A/120V/3550W
- Multi-feature control panel with covered outlets
- 75 dB at 7m and 75% load
- 3-year warranty
What it is for
- RV
Specifications
| Running watts | 3550 W |
|---|---|
| Peak / surge | 4450 W |
| Fuel | gasoline |
| Tank | 18.9 L (5.0 gal) |
| Run time at 50 % load | 14 h |
| Noise | 75 dB |
| CO shutoff | Yes |
| AC output voltage | 120 Volts |
| Weight | 49 kg (108.0 lb) |
| Warranty | 3 years |
From the Firman page. Values the manufacturer does not publish are left out.
Similar inverter & portable generators
WEN GN5602X
4500 W, gasoline
WEN DF480iX
4000 W, dual-fuel
WEN DF475T
3800 W, dual-fuel
Anker SOLIX Smart Generator 5500
3600 W, tri-fuel
Champion 3500-Watt Dual Fuel RV Ready (100307)
3500 W, dual-fuel
Energizer eZV4800
3600 W
WEN 56450i
3500 W, gasoline
Firman P03504 comparisons
- P03504 vs Generac iQ5200
- P03504 vs WEN GN5602X
- P03504 vs WEN DF480iX
- P03504 vs WEN DF475T
- P03504 vs Anker SOLIX Smart Generator 5500
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 31 →
- Wiring diagram, manual page 32 →
- Wiring diagram, manual page 33 →
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 P03504 run on a tank?
The maker rates it at 14 hours at 50 % load (about 1,775 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 P03504 start a sump pump or well pump?
Starting surge matters more than running watts: this unit is rated 4450 W peak. That covers a typical 1/2 HP sump pump (about 2150 W to start). Use the calculator with your exact pump.