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Firman W03381 - 3300/3650W Inverter Generator

The Firman W03381 is a quiet and compact inverter generator with a rated wattage of 3,300 W and a starting wattage of 3,650 W. (Read full specs)

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Firman W03381
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Price history for the Firman W03381

Lowest price $866.99
Highest price $889.99
Current price $889.99
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Description

Perfect for the home, camping, or tailgating; the W03381 is a 3650 watt generator made with you in mind.

Zoom on the Firman W03381

In a nutshell, the Firman W03381 is a quiet and compact portable inverter generator mostly geared towards:

  • RV travellers wishing to enhance their freedom and nomad lifestyle
  • People occasionally participating in sporting competitions, open-air performances and outdoor festivals
  • Handcrafting enthusiasts who wish to work on-the-go
  • Homeowners who want to be able to use the most necessary devices in their household, even during a blackout
  • Tailgating and campground aficionados with the desire of enjoying power anywhere they go

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 W03381 in use

The Firman W03381

The Firman W03381's core is the 193 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 3,300W and a peak wattage of 3,650W. 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 58 dBA (less noisy than rainfall), the inverter generator's starting mechanism is centered around a conventional pull-start mechanism.

The W03381's fuel tank, with a capacity of 1.8 gallon, supports uninterrupted operation for up to 10 hours when fully fueled (fuel consumption at an estimated 0.18 gallons per hour).

The W03381 generates a clean sine wave: providing <3% Total Harmonic Distortion (THD), delicate electronics can be plugged in its AC outlets safely.

Outlets

The control panel includes the following 3 AC outlets:

Duplex 120V 20A (5-20R)
120V 30A (TT-30R) receptacle

Furthermore, it has 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 8A receptacle providing easy battery charging capabilities.

With its TT-30R receptacle (TT as in 'Travel Trailer'), this Firman generator is RV Ready.

Portability

The Firman W03381 is distinguished by its enclosed inverter generator design (L23.2 x W17.8 x H17.9 in), providing improved aesthetics and quieter performance compared to traditional, open frame units. The generator has a contemporary design, convenient for recreationally generating power.

With a dry weight of 87 lbs, the W03381 can easily follow you wherever your power needs are. In addition, with its set of 2 wheels (⌀5") and its folding handle, it may be shifted with ease, once placed on the floor.

Features

Panel of the Firman W03381

The W03381's control panel

To help you monitor the W03381's status and activity, its control panel is equipped with a convenient meter showing you voltage, frequency and lifetime hours.

In addition to this info, several light indicators serve to show you when the oil level is too low, the generator is ready and the generator is on overload.

Considering security aspects, the generator boasts an overload protection (circuit breaker) and an automatic low oil shut-off, offering peace of mind throughout operation.

Besides the classic documentation and an owner's manual (opens in a new tab) to get you promptly started, the Firman W03381 also comes with some accessories: battery charging cables, tool kit, oil and funnel are included.

Product Videos

The Firman W03381 versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Firman W03381 compare to inverter generators of similar power (between 2500 and 3500 W).

  • Since the generator weighs in at a dry weight of 87 lbs, the Firman W03381 belongs in the expected weight range for inverters which can produce between 2500 and 3500 rated watts. If weight is an important consideration for you, the Pulsar PGD40iSCO stands out as one of the top contenders in this power category, with a dry weight of 46 pounds.
  • Since this inverter generator is rated for a lowest possible noise of 58 dBA, it can be considered as one of the more quiet of the products generating similar power. If noise is a concern for you, you could consider the Honda EU3000iS, which is one of the least noisy generators in its power range, rated at 50 dBA.
  • Autonomy-wise, with up to 10 hours on a full tank at a 25% load, the W03381 is on the low end when compared to other inverter generators of a similar power output. If extended autonomy is what matters most to you, the Champion 200977 could be an excellent choice, offering one of the longest run times among units in its power category, reaching up to 22 hours.
  • Even though run times are undoubtedly important, they are dependent on the fuel capacity to a large extent. For a more wholesome picture, we must take into consideration the fuel consumption of the generator. With an estimated fuel consumption of 0.18 GPH at a 25% load, this inverter generator aligns with the average gasoline usage range of comparable products. If you wish to further improve in the area of fuel efficiency, the Honda EU3200i, which boasts with a gas consumption of only 0.14 GPH, may be the right generator for you.

Here's a list of the most popular specific comparisons:

Price comparison

As you can see from these interactive charts, when compared to other 2500-3500W inverter generators, the Firman W03381 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
  • RV Ready
  • Parallel capable
  • Inverter
  • Quiet for its power (58 dBA)
AVERAGE SPECS:
  • Decent weight (87 lbs)
  • Decent fuel efficiency
WEAKNESSES:
  • No electric start
  • Relatively low run time

Do you own the Firman W03381 and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

General
InverterYes
Parallel capableYes, cable not included
RV readyYes
FuelGasoline
Engine193 cc Firman Max-Pro Series OHV 4-stroke, cast iron sleeve
Starting systemRecoil
Warranty3 years
Power
VoltageAC: 120V 60 Hz, DC: 12V
Running watts3,300 W
Starting watts3,650 W
Running amps27.5 amps
Peak amps30.4 amps
Run time @50% loadUnknown
Run time @25% load10 h
Features
GFCI outletsNo
Covered outletsYes
Automatic Voltage RegulationInverter
AC outlets
  • 1x Duplex 120V 20A (5-20R)
  • 1x 120V 30A (TT-30R)
DC outlets1x 5V USB port
1x 12V 8A receptacle
Data centerVFT
IndicatorsLow oil, overload and output ready
Fuel tankSteel, 1.8 gal
Fuel gaugeNo
Misc
Weight87 lbs
Approx. dimensions (L x W x H)23.2 x 17.8 x 17.9 in
Noise (lower limit)58 dBA
THD< 3%
ComplianceCARB, EPA
SecurityLow oil and overload protection
Spark arrestorYes
NeutralFloating
Accessories includedOil, funnel, tool kit, and battery charging cables
Country of originChina
SeriesWhisper
Other model numbersW3650i
UPC840876133811

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.

Spec Improvement×

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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 W03381 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 sizing calculator.
Item Running Watts Starting Watts
At home Dish washer 1500 3000
Refrigerator (energy star) 192 1192
Blender 400 850
Set of 5 LED light bulbs 55 55
Total 2147 W 3647 W
For camping RV AC (11,000 BTU) 1010 1600
RV refrigerator 180 600
Radiant heater 1300 1300
Radio 100 100
Pair of small speakers 45 45
Total 2635 W 3225 W
For work Grinder 1400 2500
Milk cooler 1100 1800
Total 2500 W 3600 W

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