Firman W01781 - 1700/2100W Inverter Generator
The Firman W01781 is a quiet, compact and lightweight inverter generator with a rated wattage of 1,700 W and a starting wattage of 2,100 W. (Read full specs)
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Description
The FIRMAN W01781 Inverter generator features 2100 starting watts and 1700 running watts. Power is supplied by our Max Pro Series 80cc FIRMAN engine which runs cool and efficient thanks to its Phoenix Fat Head Block. Our Whisper Series muffler keeps the W01781 running a quiet 54 decibels – well below the standards set by the National Parks Service, and our spark arrester has been approved by the USDA Forest Service. The .9 gallon fuel capacity provides a whopping 9 hours of run time. Starting is simple with the FIRMAN First pull, reliable recoil system.
Zoom on the Firman W01781
In short, the Firman W01781 is a quiet, compact and lightweight portable inverter generator adequately designed for:
- Camping and tailgating hobbyists looking for a portable power source
- Amateur DIY lovers
Over the following sections, you'll uncover its power characteristics, the selection of outlets it offers, its overall portability, and the supplementary features it includes.
Power & Run Time
The Firman W01781's core is the 80 cc Firman Max-Pro Series OHV 4-stroke engine with cast iron sleeve, which runs on gasoline. With an output of 120V, it provides a running wattage of 1,700W and a peak wattage of 2,100W. In addition, the device is parallel capable (Firman parallel kit (opens in a new tab) not included) and thus, can be linked to a similar or compatible unit for added power.
With a noise rating of 54 dBA (just slightly more noisy than a refrigerator), the inverter generator's starting mechanism is centered around a classic hand-operated recoil starting mechanism.
The W01781's fuel tank, with a capacity of 0.9 gallon, supports uninterrupted operation for up to 9 hours when fully fueled (fuel consumption at an estimated 0.1 gallons per hour).
Delicate electronics can be plugged in the AC outlets safely, as the W01781 generates a clean sine wave, reaching a <3% Total Harmonic Distortion (THD).
Outlets
The control panel features the upcoming 2 AC outlets:
Moreover, it comes equipped with 2 DC outlets: there's a 5V USB port ideal for charging various electronic devices such as smartphones and tablets and a 12V 5A (cigarette lighter style) receptacle enabling simple battery charging for added ease.
Portability
Thanks to its closed inverter generator design (L20 x W12.1 x H16.7 in), the Firman W01781 not only offers superior aesthetics but also operates with reduced noise levels compared to a typical, open frame generator. This type of design is the most modern and convenient way to recreationally generate power.
The W01781 boasts a weight of merely 45.9 lbs, solidifying its reputation as a lightweight, easily transportable generator. Designed for easy mobility, one person can move it around without any difficulty, ensuring power on the go. In addition, a handle (molded in the case) lets you carry it easily and further increases its convenience.
Features
The device's light indicators will illuminate to indicate if its oil levels are insufficient, the generator is ready and the generator is overloaded.
In terms of security, the generator features an automatic low oil shut-off, ensuring peace of mind during its use.
Along the basic documentation and an owner's manual (opens in a new tab), useful for starting the generator right away, the Firman W01781's package also includes these accessories: oil, tool kit, battery charging cables and funnel.
Product Video
The Firman W01781 versus other generators
The following charts are provided to give you an idea of how some of the key specs of the Firman W01781 compare to inverter generators of similar power (between 1500 and 2500 W).
- Weighing in at 45.9 lbs, the Firman W01781 fits within the expected weight range for inverters producing 1500 to 2500 rated watts. If weight is a key factor for your needs, the Genmax GM2000i is noteworthy for being one of the top contenders in this power range, with a dry weight of 34.2 pounds.
- With a lowest possible noise of 54 dBA, this inverter generator places itself amongst the more quiet of the products delivering similar power. For those who are looking for a less noisy device, we suggest the Honda EU2200i. With just 48 dBA, it is one of the most quiet devices in this power range.
- As far as autonomy is concerned, providing up to 9 hours of runtime with a full tank at a 25% load, the W01781 falls into the low end in comparison with other inverters of a comparable power output. Concerning the run times, one of the several devices with a comparable output, offering the highest autonomy, is the DuroMax XP2300iH, which is able to run for up to 13 hours.
- The run time is important, but also hugely depends on the capacity of the fuel tank and doesn't mean much if we don't talk about fuel consumption as well. This inverter generator is one of the more fuel-efficient options in its power range, consuming approximately 0.1 GPH (gallon per hour) at 25% load. If minimizing fuel usage is one of your key priorities, the Westinghouse iGen2800 is one of the most efficient devices with similar power output, with a gasoline consumption of only 0.08 gallons per hour.
Here's a list of the most popular specific comparisons:
Price comparison
As you can see from these interactive charts, when compared to other 1500-2500W inverter generators, the Firman W01781 is on the average side of the price range.
Therefore, this generator nicely fits in the expected budget for this kind of product.
The bottom line
- In the expected price range
- Several accessories included
- Parallel capable
- Inverter
- Quiet for its power (54 dBA)
- Fuel efficient
- Decent weight (45.9 lbs)
- No data center
- Relatively low run time
Features and Specifications
| Inverter | Yes |
|---|---|
| Parallel capable | Yes, cable not included |
| RV ready | No |
| Fuel | Gasoline |
| Engine | 80 cc Firman Max-Pro Series OHV 4-stroke, cast iron sleeve |
| Starting system | Recoil |
| Warranty | 3 years |
| Voltage | AC: 120V 60 Hz, DC: 12V |
|---|---|
| Running watts | 1,700 W |
| Starting watts | 2,100 W |
| Running amps | 14.2 amps |
| Peak amps | 17.5 amps |
| Run time @50% load | 4.25 h |
| Run time @25% load | 9 h |
| GFCI outlets | No |
|---|---|
| Covered outlets | Yes |
| Automatic Voltage Regulation | Inverter |
| AC outlets | 1x Duplex 120V 20A (5-20R) |
| DC outlets | 1x 5V USB port 1x 12V 5A (cigarette lighter style) |
| Data center | No |
| Indicators | Low oil, overload and output ready |
| Fuel tank | Plastic, 0.9 gal |
| Fuel gauge | No |
| Weight | 45.9 lbs |
|---|---|
| Approx. dimensions (L x W x H) | 20 x 12.1 x 16.7 in |
| Noise (lower limit) | 54 dBA |
| THD | < 3% |
| Compliance | CARB, EPA |
| Security | Low oil protection |
| Spark arrestor | Yes |
| Neutral | Floating |
| Accessories included | Oil, funnel, tool kit, and battery charging cables |
| Country of origin | China |
| Series | Whisper |
| Other model numbers | W2100i |
| UPC | 840876117811 |
We've taken extra care to research and verify each of the specifications above. That said, occasional mistakes or omissions are still possible. If you spot any missing or inaccurate information, feel free to suggest a correction so we can address it.
About FIRMAN Power Equipment
Founded in 1999, Firman Power Equipment is a company with a short, but established history in the power equipment industry. Based in Arizona, the company offers an immense range of products, including power tools, automotive equipment, storage utilities, work wear, but most importantly, a wide selection of generators of all sizes, designs and outputs. Interestingly, Firman is a wholly owned subsidiary of the China National Machinery Industry Corporation - a somewhat well renowned company in China and acts as a de facto distributor of their products in the US.
Warranty Information
The Firman W01781 is covered under a warranty for up to 3 years. This warranty may be limited and may not cover all parts of the generator.
For more information about the warranty of Firman generators, please consult Firman's warranty policies (opens in a new tab). Alternatively, you can also contact their Customer Support: 1-844-FIRMAN1 (844-347-6261).
Questions & Answers
What can it power?
| Item | Running Watts | Starting Watts | |
|---|---|---|---|
| At home | Refrigerator (energy star) | 192 | 1192 |
| Washing machine | 900 | 1650 | |
| Total | 1092 W | 2092 W | |
| For camping | Radiant heater | 1300 | 1300 |
| Set of 5 LED light bulbs | 55 | 55 | |
| Total | 1355 W | 1355 W | |
| For work | Demolition hammer | 1260 | 1260 |
| Bug zapper | 80 | 80 | |
| Total | 1340 W | 1340 W |
Couldn't find the right answer for you? Ask your own question.




User Reviews
not too heavy at approx 48 lb.
quiet – sitting just outside the mobile home and we can’t hear it inside.
ran all night on a tank of fuel which is .9 gal.
In order to check the oil; the front panel must be removed. There are several tiny screws to undo and possibly in the dark. Very terrible design feature. Other than that I would recommend this generator. (I’m going to cut an access hole!)