Firman W03661OF - 3650/4500W Open Frame Inverter Generator
The Firman W03661OF is a portable open frame inverter generator with a rated wattage of 3,650 W and a starting wattage of 4,500 W. (Read full specs)
The Home Depot
JB Tools
Amazon
| Price history for the Firman W03661OF |
|---|
|
Highest Price
$868.00
Lowest Price
$849.99
Current Price
$868.00
|
Page Content
Description
Zoom on the Firman W03661OF
In a few words, the Firman W03661OF is a portable inverter generator perfectly suited for:
- RV travellers looking for even more independence
- Occasional participants of outdoor events, competitions, concerts and festivals
- Homeowners who want to be able to use the most necessary devices in their household, even during a blackout
- Camping and tailgating hobbyists looking for a portable power source
The subsequent sections will explore in detail its power characteristics, the diverse outlets it provides, its overall portability, and the supplementary features it offers.
Power & Run Time
The Firman W03661OF
The Firman W03661OF's core is the 208 cc OHV 4-stroke engine with cast iron sleeve, which runs on gasoline. With an output of 120V, it provides a running wattage of 3,650W and a peak wattage of 4,500W. Furthermore, its parallel capability (parallel kit not included) allows for increasing of power output when connected to another similar or compatible unit, ensuring expanded energy capacity and reliability for various applications.
Enjoying a noise rating of 69 dBA (less noisy than background music), this inverter generator gets running thanks to a traditional recoil pull-start mechanism.
With a fuel capacity of 6 gallons, the W03661OF can run for up to 25 hours when the tank is full (fuel consumption is approximately 0.24 gallons per hour).
The W03661OF 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 includes the following 4 AC outlets:
Additionally, it features 3 DC outlets: there's two 5V USB ports (USB-A) with which charging of electronics like mobile phones and tablets is made convenient and a 12V 8A (cigarette lighter style) receptacle offering a convenient battery charging option.
For RV owners with a 50-amp service, this Firman unit is RV-ready, boasting a 14-50R outlet.
Important note: The 14-50R outlet is normally 120/240V. However, this unit does not produce 240V. This outlet is here for your convenience, but should only be used to power 120V appliances. In addition, since the generator provides a maximum of 3650 running watts, it will not be possible to draw the full 50 amps from the outlet.
Portability
With dimensions of L24.5 x W24.1 x H23 in, the traditional open frame design of the Firman W03661OF ensures stability while allowing easy maintenance access to components and promoting effective air cooling. The featured design is ideal for the outdoors and all tough environments.
Even at 106 lbs, the generator is categorized as 'portable,' suggesting its movability, although its weight impede its portability. Nonetheless, the limited maneuverability is compensated for by utilizing its set of wheels (⌀9") and its folding handle, which facilitates shifting once the generator is set on the ground.
Features
The W03661OF's control panel
The W03661OF's status and activity may be monitored conveniently via the control panel, as it features a convenient meter, showing voltage, frequency, and lifetime hours metrics.
In addition to this info, several light indicators serve to show you when the generator is ready, its oil levels are insufficient and the generator is overloaded.
The built-in fuel gauge of the inverter generator ensures simple and quick gas level assessments.
Considering security aspects, the generator boasts an overload protection (circuit breaker) and an automatic low oil shut-off, offering peace of mind throughout operation.
The W03661OF also benefits from Firman’s CO Alert carbon monoxide shutdown, which automatically shuts down the engine when harmful levels of carbon monoxide accumulate around the generator or a CO Alert fault occurs.
Apart from the typical documentation and an owner's manual (opens in a new tab), which lets you start it right away, the Firman W03661OF also is packed along with the following accessories: battery charging cables, funnel, RV adapter, tool kit and oil.
The Firman W03661OF versus other generators
The following charts are provided to give you an idea of how some of the key specs of the Firman W03661OF compare to inverter generators of similar power (between 3500 and 4500 W).
- Since the generator weighs in at a dry weight of 106 lbs, the Firman W03661OF belongs in the expected weight range for inverters which can produce between 3500 and 4500 rated watts. If weight matters to you, one of the champions in this power range is the WEN 56432iX with only 52.9 pounds.
- In comparison to generators with a similar running wattage, this inverter generator's lowest emitted noise of 69 dBA can be considered noisy. For those who are looking for a less noisy device, we suggest the Westinghouse iGen5000DF. With just 52 dBA, it is one of the most quiet devices in this power range.
- At 25% load, the W03661OF boasts one of the highest run times than most similarly powerful inverters, reaching up to 25 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. Compared to its peers, this inverter generator is not exactly fuel-efficient, compared to similarly powerful devices, with an estimated fuel consumption of 0.24 GPH at a 25% load. To prioritize fuel savings, we advise considering the Champion 201319, which stands out for its gasoline efficiency, consuming just 0.16 gallons per hour.
Price comparison
As you can see from these interactive charts, when compared to other 3500-4500W inverter generators, the Firman W03661OF 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
- CO Alert technology
- Several accessories included
- RV adapter included
- Parallel capable
- Inverter
- High run time
- Decent weight (106 lbs)
- No 240V output
- No electric start
- On the noisy side (69 dBA)
- Low fuel efficiency
Do you own the Firman W03661OF and agree (or disagree) with these strengths and weaknesses?
Let us know and write your own review.
Features and Specifications
| Inverter | Yes |
|---|---|
| Parallel capable | Yes, cable not included |
| RV ready | No |
| Fuel | Gasoline |
| Engine | 208 cc OHV 4-stroke, cast iron sleeve |
| Starting system | Recoil |
| Warranty | 3 years |
| Voltage | AC: 120V 60 Hz, DC: 12V |
|---|---|
| Running watts | 3,650 W |
| Starting watts | 4,500 W |
| Running amps | 30.4 amps |
| Peak amps | 37.5 amps |
| Run time @50% load | Unknown |
| Run time @25% load | 25 h |
| GFCI outlets | No |
|---|---|
| Covered outlets | Yes |
| Automatic Voltage Regulation | Inverter |
| AC outlets |
|
| DC outlets | 2x 5V USB port (USB-A) 1x 12V 8A (cigarette lighter style) |
| Data center | VFT |
| Indicators | Low oil, overload and output ready |
| Fuel tank | Steel, 6 gal |
| Fuel gauge | Yes |
| Weight | 106 lbs |
|---|---|
| Approx. dimensions (L x W x H) | 24.5 x 24.1 x 23 in |
| Noise (lower limit) | 69 dBA |
| THD | < 3% |
| Compliance | CARB, EPA |
| Security | Low oil and overload protection, CO monitoring |
| Spark arrestor | Yes |
| Neutral | Floating |
| Accessories included | Oil, funnel, tool kit, RV adapter, battery charging cables, and wheel kit |
| Country of origin | China |
| Series | Whisper |
| UPC | 840876136614 |
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 W03661OF 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 |
| Hair dryer | 1800 | 1900 | |
| Washing machine | 900 | 1650 | |
| Cell phone charger | 20 | 20 | |
| Total | 2912 W | 3912 W | |
| For camping | Radiant heater | 1300 | 1300 |
| RV refrigerator | 180 | 600 | |
| RV AC (11,000 BTU) | 1010 | 1600 | |
| Blender | 400 | 850 | |
| Cell phone charger | 20 | 20 | |
| Total | 2910 W | 3500 W | |
| For work | Grinder | 1400 | 2500 |
| Demolition hammer | 1260 | 1260 | |
| Drain cleaner | 250 | 250 | |
| Total | 2910 W | 4010 W |
Couldn't find the right answer for you? Ask your own question.
