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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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'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:
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
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
- In the expected price range
- Several accessories included
- RV Ready
- Parallel capable
- Inverter
- Quiet for its power (58 dBA)
- Decent weight (87 lbs)
- Decent fuel efficiency
- No electric start
- Relatively low run time
Features and Specifications
| Inverter | Yes |
|---|---|
| Parallel capable | Yes, cable not included |
| RV ready | Yes |
| Fuel | Gasoline |
| Engine | 193 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 | 3,300 W |
| Starting watts | 3,650 W |
| Running amps | 27.5 amps |
| Peak amps | 30.4 amps |
| Run time @50% load | Unknown |
| Run time @25% load | 10 h |
| GFCI outlets | No |
|---|---|
| Covered outlets | Yes |
| Automatic Voltage Regulation | Inverter |
| AC outlets |
|
| DC outlets | 1x 5V USB port 1x 12V 8A receptacle |
| Data center | VFT |
| Indicators | Low oil, overload and output ready |
| Fuel tank | Steel, 1.8 gal |
| Fuel gauge | No |
| Weight | 87 lbs |
|---|---|
| Approx. dimensions (L x W x H) | 23.2 x 17.8 x 17.9 in |
| Noise (lower limit) | 58 dBA |
| THD | < 3% |
| Compliance | CARB, EPA |
| Security | Low oil and overload 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 | W3650i |
| UPC | 840876133811 |
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 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?
| 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 |
Couldn't find the right answer for you? Ask your own question.



