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Firman W01781 Spec Review

The Firman W01781 is a quiet, compact and lightweight portable 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 59 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 a nutshell, the Firman W01781 is a quiet, compact and lightweight portable inverter generator mostly geared towards:

  • Camping and tailgating hobbyists looking for a portable power source
  • Amateur DIY lovers

The following sections will present you in detail its power characteristics, the different outlets it offers, its overall portability, the extra features it benefits from, and any relevant emission compliance details.

Power & Run Time

The Firman W01781 in use

The Firman W01781

The Firman W01781's engine, 80 cc Firman Max-Pro Series OHV 4-stroke, fueled by gasoline, can deliver 120V. It provides a running wattage of 1700W and reaches a peak wattage of 2100W. Moreover, since it is parallel capable (Firman parallel kit (opens in a new tab) not included), its power may be doubled if linked to a second compatible unit.

With a noise rating of 59 dBA (less noisy than rainfall), the inverter generator features a simple traditional pull-start mechanism.

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

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 features the following 2 AC outlets:

Duplex 120V 20A (5-20R)

In addition, it provides 2 DC outlets: there's a 5V USB port with which charging of electronics like mobile phones and tablets is made convenient and a 12V 5A (cigarette lighter style) receptacle with which charging your batteries is made easy.

Portability

Since the Firman W01781 is an inverter generator, its closed design (L20 x W12.1 x H16.7 in) has an esthetical advantage over conventional, open frame devices. The generator has a contemporary design, convenient for recreationally generating power.

With a weight of only 45.9 lbs, the W01781 may be viewed as a lightweight and portable generator. The generator can be moved with ease by only one person and so it can be enjoyed on-the-go. This convenience is further enhanced thanks to its handle (molded in the case) that allows you to carry it with ease.

Features

Panel of the Firman W01781

The W01781's control panel

The device’s light indicators will display if the generator is ready, the generator is overloaded and the oil level is too low.

As far as security is concerned, the generator can be used with a peace of mind, as it features an automatic low oil shut-off.

Apart from the typical documentation and an owner's manual (opens in a new tab), which lets you start it right away, the Firman W01781 also is packed along with the following accessories: battery charging cables, tool kit, funnel and oil.

Emissions

The Firman W01781 is EPA-approved and CARB-compliant. It can therefore be sold and purchased in all 50 states, including California.

Moreover, it features a spark arrestor, which makes it suitable 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).

  • Weight-wise, the Firman W01781 has only 45.9 lbs, which renders it one of the lighter generators which produce 1500 to 2500 rated watts. In terms of weight, one of the champions in their power range is the Champion 200949, standing at just 38.6 lbs.
  • If compared to generators capable of producing a similar running wattage, this inverter generator with a lowest emitted noise of 59 dBA can be considered somewhat noisy. 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.
  • Regarding its autonomy, the autonomy of the W01781, reaching up to 9 hours at a 25% load, can be considered as low end, compared to other products of a roughly equal output. If autonomy is your priority, one of the devices of a similar power output with the highest run time is the Westinghouse WGen2000, reaching up to 26 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. With an estimated gasoline consumption of 0.1 GPH (gallon per hour) at 25% load, this inverter generator is among the more fuel efficient of the products in the above-mentioned wattage range. If fuel consumption is your top priority, we suggest to check out the Predator 2000, which has a fuel consumption of only 0.08 GPH and thus, is one of the most efficient devices in our database.
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 cheap side of the price range.

It can therefore be a really good buy if you're looking to acquire a budget generator.

The bottom line

STRENGTHS:
  • Inexpensive
  • Several accessories included
  • Parallel capable
  • Inverter
  • Lightweight (45.9 lbs)
  • Fuel efficient
AVERAGE SPECS:
  • Quiet, but noisy for its type (59 dBA)
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)59 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.

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 sizer.
ItemRunning WattsStarting Watts
At homeRefrigerator (energy star)1921192
Washing machine9001650
Total1092 W2092 W
For campingRadiant heater13001300
Set of 5 LED light bulbs5555
Total1355 W1355 W
For workDemolition hammer12601260
Bug zapper8080
Total1340 W1340 W

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