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
To sum up, the Firman W01781 is a quiet, compact and lightweight portable inverter generator tailored for:
- Tailgating and campground aficionados with the desire of enjoying power anywhere they go
- Amateur DIY lovers
In the following paragraphs, we shall explore the power characteristics, available outlets, portability, and any additional features of the device.
Power & Run Time
With a 80 cc Firman Max-Pro Series OHV 4-stroke engine with cast iron sleeve, the Firman W01781 operates on gasoline, providing 120V, with a running wattage of 1,700W and a starting wattage of 2,100W. In addition, as it is parallel capable (Firman parallel kit (opens in a new tab) not included), this power can be doubled when linked to another similar or compatible unit.
Enjoying a noise rating of 54 dBA (just slightly more noisy than a conversation at home), this inverter generator gets running thanks to a manual recoil starter system.
Featuring a 0.9 gallon fuel tank, the W01781 can provide power for up to 9 hours on a full tank (with fuel consumption averaging 0.1 gallons per hour).
The W01781 produces a clean sine wave: thanks to a <3% Total Harmonic Distortion (THD), your sensitive electronics can be safely plugged in the AC outlets.
Outlets
The control panel features the upcoming 2 AC outlets:
Furthermore, it showcases 2 DC outlets: there's a 5V USB port perfect for conveniently charging mobile phones, tablets, and other electronic devices and a 12V 5A (cigarette lighter style) receptacle with which you may charge your batteries with 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. The featured design follows the latest trends and is ideal for easy and recreational use.
The W01781 boasts a weight of merely 45.9 lbs, solidifying its reputation as a lightweight, easily transportable generator. The device can be easily moved by just one person and thus, its power may be enjoyed on-the-go. Its handle (molded in the case) adds to the convenience, making it easy to carry.
Features
Light indicators on the device will signal if the generator is overloaded, its oil levels are insufficient and the generator is ready.
From a security point of view, the generator is equipped with an automatic low oil shut-off, giving you a peace of mind during use.
In addition to the traditional documentation and an owner's manual (opens in a new tab) to help you get started promptly, the Firman W01781 also includes several accessories: tool kit, battery charging cables, oil 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.
- Rated at a lowest possible noise level of 54 dBA, this inverter generator positions itself amongst the more quiet of the products of similar type and power. If noise emissions are important to you, one of the least noisy generators of this power range is the Honda EU2200i with only 48 dBA.
- In terms of autonomy, the W01781 offers up to 9 hours at a 25% load, placing it at the lower range within its type and power range. If extended autonomy is what matters most to you, the DuroMax XP2300iH could be an excellent choice, offering one of the longest run times among units in its power category, reaching up to 13 hours.
- Autonomy holds its importance, however, it is largely dependent on the generator’s fuel capacity and so, it is nonsensible to discuss it without mentioning fuel efficiency 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 DuroMax XP2300iH 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 | RV AC (11,000 BTU) | 1010 | 1600 |
| RV refrigerator | 180 | 600 | |
| Game console | 150 | 150 | |
| Total | 1340 W | 1930 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!)