WEN DG4500iX
3650 W, dual-fuel
Firman H03654
Generator · Hybrid. Specs from the manufacturer page (checked ).
The Firman H03654 is a dual-fuel inverter generator rated at 3650 W running and 4550 W starting on gas, or 3300 W running and 4100 W starting on LPG. It has a 208cc engine, a 5-gallon tank that runs up to 14 hours at 50% load, and 120-volt outlets.
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Running
3650W
Peak / surge
4550W
Fuel
dual-fuel
Run time @50 %
14h
Noise
67dB
Weight
54.2kg
Warranty
3yr
Key features
- 208cc dual-fuel engine running on gas or LPG
- Running watts 3650W (gas) and 3300W (LPG); starting watts 4550W (gas) and 4100W (LPG)
- Recoil start and electric start
- 5-gallon tank with fuel gauge; up to 14 hours of run time at 50% load
- Low oil shutoff and CO Alert Sensor
- 67dB at 50% load
- Multi control panel with covered outlets: one 5-20R 120V 20A duplex, one L5-30R 120V 30A twistlock, one TT-30R 120V 30A twistlock
What it is for
- RV use
Specifications
| Running watts | 3650 W |
|---|---|
| Peak / surge | 4550 W |
| Fuel | dual-fuel |
| Tank | 18.9 L (5.0 gal) |
| Run time at 50 % load | 14 h |
| Noise | 67 dB |
| AC output voltage | 120 volts |
| Weight | 54.2 kg (119.5 lb) |
| Warranty | 3 years |
From the Firman page. Values the manufacturer does not publish are left out.
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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.
- Wiring diagram, manual page 2 →
- Wiring diagram, manual page 36 →
- Wiring diagram, manual page 37 →
- Wiring diagram, manual page 38 →
- Wiring diagram, manual page 39 →
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 H03654 run on a tank?
The maker rates it at 14 hours at 50 % load (about 1,825 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 H03654 start a sump pump or well pump?
Starting surge matters more than running watts: this unit is rated 4550 W peak. That covers a typical 1/2 HP sump pump (about 2150 W to start). Use the calculator with your exact pump.