Pulsar 2200W Dual Fuel Inverter
1800 W, dual-fuel
Firman W01781
Generator · Whisper Series. Specs from the manufacturer page (checked ).
The Firman W01781 is a gasoline inverter generator with 1700 W running output and 2100 W starting output, powered by an 80cc engine. It provides 120V AC power through a 5-20R duplex outlet, a USB-A port and a 12V DC port.
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Running
1700W
Peak / surge
2100W
Fuel
gasoline
Run time @50 %
9h
Noise
59dB
Weight
20.8kg
Warranty
3yr
Key features
- 80cc engine with recoil start and low oil shutoff
- 1700 W running watts and 2100 W starting watts at 120 volts
- Clean power with 3% or less THD
- 0.9-gallon fuel tank with up to 9 hours of run time at 25% load
- 59 dB at 1/4 load
- Outlets: one 5-20R 120V 20A duplex (14.2A/120V/1700W), one USB-A (2.1A/5V DC/10W), one 12V DC power port (8.3A/12V DC/100W)
- Covered outlets and a 3-year warranty
- Weight 45.9 lbs
Specifications
| Running watts | 1700 W |
|---|---|
| Peak / surge | 2100 W |
| Fuel | gasoline |
| Tank | 3.4 L (0.9 gal) |
| Run time at 50 % load | 9 h |
| Noise | 59 dB |
| AC output voltage | 120V |
| Weight | 20.8 kg (45.9 lb) |
| Warranty | 3 years |
From the Firman page. Values the manufacturer does not publish are left out.
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Firman W01781 comparisons
- W01781 vs Pulsar 2200W Dual Fuel Inverter
- W01781 vs Yamaha EF2200iS
- W01781 vs Champion 2500-Watt Dual Fuel Inverter
- W01781 vs Generac 2500i
- W01781 vs Westinghouse iGen2800DFc
- W01781 vs WEN DF250iX
All 7 comparisons
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.
Open the Firman manual (PDF) →
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 W01781 run on a tank?
The maker rates it at 9 hours at 50 % load (about 850 W) on a 0.9-gal tank. A light load such as a refrigerator and lights runs longer; a full load runs shorter.
Can the Firman W01781 start a sump pump or well pump?
Starting surge matters more than running watts: this unit is rated 2100 W peak. That is below a typical 1/2 HP sump pump start (about 2150 W); check your pump label. Use the calculator with your exact pump.