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Firman W01781 Spec Review

The Firman W01781 is a quiet, compact and lightweight inverter generator with a rated wattage of 1700 W and a starting wattage of 2100 W.

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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. (source: Firman (opens in a new tab))

Zoom on the Firman W01781

In summary, the Firman W01781 is a quiet, compact and lightweight portable inverter generator especially useful for:

  • Camping and tailgating buffs looking to enhance their experience
  • Handcrafting enthusiasts who wish to work on-the-go

In the sections ahead, the power characteristics, availability of various outlets, the portability, and any additional features of the device shall be discussed, including its emission compliance information.

Power & Run Time

The Firman W01781 in use

The Firman W01781

The Firman W01781 is powered by a 80 cc Firman Max-Pro Series OHV 4-stroke engine. It delivers 120V, runs on gasoline and offers a running wattage of 1700W as well as a peak wattage of 2100W. 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.

At a noise rating of 54 dBA (just slightly more noisy than a quiet suburb), the inverter generator is started via a simple traditional pull-start mechanism.

Thanks to a fuel capacity of 0.9 gallon, the W01781 can operate for up to 9 hours with a full tank (fuel consumption around 0.1 GPH).

Delicate electronics can be plugged in an AC outlets safely, as the W01781 generates a clean sine wave, reaching a <3% Total Harmonic Disruption (THD).

Outlets

The control panel includes the following 2 AC outlets:

Duplex 120V 20A (5-20R)

Additionally, it features 2 DC outlets: there's a 5V USB port allowing you to conveniently charge electronics such as mobile phones and tablets and a 12V 5A (cigarette lighter style) receptacle with which you may charge your batteries with ease.

Portability

The Firman W01781 is an inverter generator and has an encased design of the following dimensions: L20 x W12.1 x H16.7 in. Thus, it is more aesthetical than conventional, open frame products. The generator has a contemporary design, convenient for recreationally generating power.

Since the W01781 weighs only 45.9 lbs, it can be labeled as a portable lightweight generator. A single person should not have any problems moving it around and thus, enjoy power availability on-the-go. In addition, a handle (molded in the case) lets you carry it easily and further increases its convenience.

Features

Panel of the Firman W01781

The W01781's control panel

The light indicators show you if the generator is ready, the oil level is too low and the generator is on overload.

From a security standpoint, the product offers an automatic low oil shut-off, allowing you to use it with a peace of mind.

While the standard documentation and an owner's manual (opens in a new tab), helpful for starting the device promptly, come with the Firman W01781, the following accessories are also included: funnel, tool kit, oil and battery charging cables.

Emissions

The Firman W01781 is EPA-approved and CARB-compliant. Therefore, its sale and purchase are permitted in all of the 50 states, including California.

Moreover, it features a spark arrestor, so it is adequate for use in forested areas.

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 generators of similar power (between 1500 and 2500 W).

  • As far as its dry weight is concerned, the Firman W01781 weighs just 45.9 pounds and thus, it is one of the lighter 1500 to 2500 rated wattage generators. If weight is your top priority, one of the champions in this power category is the Champion 200949, weighing just 38.6 pounds.
  • With a lowest possible noise of 54 dBA, this inverter generator places itself amongst the more quiet of the products delivering similar 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.
  • Autonomy-wise, with up to 9 hours on a full tank at a 25% load, the W01781 is on the low end when compared to other generators of a similar power output. Furthermore, considering the run times, one of the generators which have a roughly same power output, with the highest autonomy, is the Westinghouse WGen2000, as it provides up to 26 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 can be considered as fuel efficient, due to its low estimated fuel consumption of only 0.1 GPH (gallon per hour) at 25% load, within the aforementioned wattage range. If you are concerned with gasoline efficiency, having a fuel consumption of just 0.08 GPH, the Predator 2000 is a device you should look out for.
According to our stats, the following comparison is pretty popular: Firman W01781 vs Firman W01784.

Price comparison

As you can see from this interactive chart, when compared to other 1500-2500W 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

STRENGTHS:
  • In the expected price range
  • Several accessories included
  • Parallel capable
  • Inverter
  • Lightweight (45.9 lbs)
  • Quiet for its power (54 dBA)
  • Fuel efficient
WEAKNESSES:
  • No data center
  • No electric start
  • Relatively low run time

Do you own the Firman W01781 and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

General
InverterYes
PortableYes
Parallel capableYes, cable not included
RV readyNo
FuelGasoline
Engine80 cc Firman Max-Pro Series OHV 4-stroke
Starting systemRecoil
Power
VoltageAC: 120V 60 Hz, DC: 12V
Running watts1700 W
Starting watts2100 W
Running amps14.2 amps
Peaks amps17.5 amps
Run time @50% load4.25 h
Run time @25% load9 h
Features
GFCI outletsNo
Covered outletsYes
Automatic Voltage RegulationInverter
AC outlets1x Duplex 120V 20A (5-20R)
DC outlets1x 5V USB port
1x 12V 5A (cigarette lighter style)
Data centerNo
IndicatorsLow oil, overload and output ready
Fuel tankPlastic, 0.9 gal
Fuel gaugeNo
Misc
Weight45.9 lbs
Approx. dimensions (L x W x H)20 x 12.1 x 16.7 in
Noise (lower limit)54 dBA
THD< 3%
EmissionsCARB, EPA
SecurityLow oil protection
Spark arrestorYes
NeutralFloating
Accessories includedOil, funnel, tool kit, and battery charging cables
Warranty3 years
SeriesWhisper

Unlike many websites, we did our best to research each of the specs above. That being said, we are not immune to making the occasional mistake or omission. Should you notice any missing or incorrect values, don't hesitate to suggest improvements so we can address the issue.

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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?
Examples of items that can be simultaneously powered.
The examples below are based on a maximum load of 80% and estimated wattages. For a more accurate estimation, use our generator size calculator.
ItemRunning WattsStarting Watts
At homeRefrigerator (energy star)1921192
Washing machine9001650
Total1092 W2092 W
For campingRV AC (11,000 BTU)10101600
RV refrigerator180600
LED TV150150
Total1340 W1930 W
For workDemolition hammer12601260
Bug zapper8080
Total1340 W1340 W

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Firman W01781
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1 Review
  1. 5
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    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!)

    + PROS:
    • quiet
    • long running on .9 gallon of gas
    • fairly light weight
    - CONS:
    • Lousy access to check and add oil.
    Helpful(1) Unhelpful(0)You have already voted this

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