A-iPower AP3700i
3200 W, gasoline
Firman WH03242
Generator · Legendary. Specs from the manufacturer page (checked ).
The Firman WH03242 is a dual-fuel inverter generator rated 3200 W running and 4000 W starting on gasoline. It also runs on LPG at 3000 W running and 3750 W starting, with 120 volt output and a 1.8-gallon tank. The page lists a 3-year warranty.
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Running
3200W
Peak / surge
4000W
Fuel
dual-fuel
Run time @50 %
9h
Noise
58dB
CO shutoff
Yes
Weight
40.8kg
Warranty
3yr
Key features
- 193cc Max Pro Series engine
- Recoil start and electric start
- Low oil shut off and CO alert technology
- Running watts 3200W (gas) and 3000W (LPG); starting watts 4000W (gas) and 3750W (LPG)
- 1.8-gallon tank with up to 9 hours of run time at 25% load
- Outlets: 1 x 5-20R 120V 20A duplex, 1 x TT-30R 120V 30A RV, 1 x USB (5V 2.1A), 1 x 12V DC angled 2-prong
- 3-year warranty
Specifications
| Running watts | 3200 W |
|---|---|
| Peak / surge | 4000 W |
| Fuel | dual-fuel |
| Tank | 6.8 L (1.8 gal) |
| Run time at 50 % load | 9 h |
| Noise | 58 dB |
| CO shutoff | Yes |
| AC output voltage | 120 volts |
| Weight | 40.8 kg (89.9 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 3 →
- Wiring diagram, manual page 41 →
- Wiring diagram, manual page 42 →
- Wiring diagram, manual page 43 →
- Wiring diagram, manual page 44 →
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 WH03242 run on a tank?
The maker rates it at 9 hours at 50 % load (about 1,600 W) on a 1.8-gal tank. A light load such as a refrigerator and lights runs longer; a full load runs shorter.
Can the Firman WH03242 start a sump pump or well pump?
Starting surge matters more than running watts: this unit is rated 4000 W peak. That covers a typical 1/2 HP sump pump (about 2150 W to start). Use the calculator with your exact pump.