The Firman P03631 is a portable open frame generator with a rated wattage of 3,650 W and a starting wattage of 4,450 W. (Read full specs)
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Description
Zoom on the Firman P03631
In short, the Firman P03631 is a portable generator adequately designed for:
- RV travellers who wish to upgrade their experience to another level
- Occasional participants of outdoor events, competitions, concerts and festivals
- Homeowners in need of an emergency backup power for their essentials
- Professionals who want to be able to deliver results, even during a power failure
In the following paragraphs, we shall explore the power characteristics, available outlets, portability, and any additional features of the device.
Power & Run Time
With a 208 cc Firman Max-Pro Series OHV 4-stroke engine, the Firman P03631 operates on gasoline, providing 120/240V, with a running wattage of 3,650W and a starting wattage of 4,450W.
With a noise rating of 75 dBA (just slightly more noisy than a dishwasher), the generator features a conventional pull-start mechanism, but also a user-friendly and efficient electric starter (battery included). To increase convenience, the P03631 offers remote starting functionality, allowing for easy operation from a distance (key fob included).
The P03631's fuel tank, with a capacity of 5 gallons, supports uninterrupted operation for around 14 hours at 50% load when fully fueled (fuel consumption at an estimated 0.36 gallons per hour).
The quite high THD (<25%) of the P03631 makes it unsuitable for powering sensitive electronic devices.
Outlets
The control panel features the following 4 AC outlets:
Moreover, it presents 3 DC outlets: there's a 12V 8A (cigarette lighter style) receptacle providing easy battery charging capabilities and two 5V USB ports (USB-A) allowing you to conveniently charge electronics such as mobile phones and tablets.
Thanks to its TT-30R receptacle (TT stands for 'Travel Trailer'), this Firman generator is RV Ready, making it ideal for powering recreational vehicles. In addition, because the P03631 is equipped with a twist-lock L14-30R receptacle, it is transfer switch ready: it can power your home during a power outage, as it can be easily connected to your breaker box to power your household.
Portability
Measuring L24.8 x W21.7 x H21.7 in, the classic open frame construction of the Firman P03631 provides stability while enabling convenient maintenance access to components and adequate air cooling. This type of design is ideal for tough environments and heavy outdoor use.
Though weighing 119.5 lbs, the generator remains classified as 'portable,' indicating its capability to be moved, though its weight could pose transport challenges. Despite the restricted maneuverability, its wheel kit (⌀8") and its folding handle provides a solution, allowing for convenient shifting once the generator is positioned on the ground.
Features
The P03631's control panel
The P03631's status and activity may be monitored conveniently via the control panel, as it features a convenient meter, which displays voltage, frequency and lifetime hours. To offer you even more control and easy operation during nighttime, the panel is LED-lit.
In addition to this info, when the oil level is too low, you will be informed by the featured light indicator.
A built-in fuel gauge allows for a quick, easy and convenient check of the fuel level of the generator.
Security-wise, this product benefits from an overload protection (circuit breaker) and an automatic low oil shut-off, which gives you a complete peace of mind when using it.
The P03631 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 P03631 also is packed along with the following accessories: tool kit, funnel, key fob and oil.
The Firman P03631 versus other generators
The following charts are provided to give you an idea of how some of the key specs of the Firman P03631 compare to generators of similar power (between 3500 and 4500 W).
- With a dry weight of 119.5 lbs, the Firman P03631 sits comfortably within the expected weight range for devices generating 3500 to 4500 rated watts. Regarding dry weight, one of the champions in the same power range is the Genmax GM4600iAEFIC, with a dry weight of only 58.4 lbs.
- As this generator has its lowest possible noise of 75 dBA, it should be considered noisier compared to its peers of a comparable running wattage. If noise emissions are important to you, one of the least noisy generators of this power range is the Westinghouse iGen4500DF with only 52 dBA.
- With a run time of around 14 hours at 50% load, the P03631 has one of the higher run times, compared to its similarly powerful peers. If runtime is a priority for you, the Predator 4375 stands out as one of the generators with the longest run time in its power range, providing around 16 hours of continuous use.
- Though run time is a significant parameter, it's closely tied to the generator's fuel tank size. To get a comprehensive understanding, fuel efficiency must also be taken into account. As this generator uses an estimated 0.36 GPH (gallon per hour) at a 50% load, it finds itself in the average gasoline consumption range of similar products. To prioritize fuel savings, we advise considering the Westinghouse iGen4500DF, which stands out for its gasoline efficiency, consuming just 0.23 gallons per hour.
Price comparison
As you can see from these interactive charts, when compared to other 3500-4500W generators, the Firman P03631 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
- Illuminated control panel
- CO Alert technology
- Several accessories included
- GFCI Outlets
- RV Ready
- Remote start
- High run time
- Decent weight (119.5 lbs)
- Decent fuel efficiency
- On the noisy side (75 dBA)
Features and Specifications
| Inverter | No |
|---|---|
| Parallel capable | No |
| RV ready | Yes |
| Fuel | Gasoline |
| Engine | 208 cc Firman Max-Pro Series OHV 4-stroke |
| Starting system | Recoil, Electric, Remote |
| Warranty | 3 years |
| Voltage | AC: 120/240V 60 Hz, DC: 12V |
|---|---|
| Running watts | 3,650 W |
| Starting watts | 4,450 W |
| Running amps (@120/240V) | 30.4/15.2 amps |
| Peak amps (@120/240V) | 37.1/18.5 amps |
| Run time @50% load | 14 h |
| Run time @25% load | Unknown |
| GFCI outlets | Yes |
|---|---|
| Covered outlets | Yes |
| Automatic Voltage Regulation | Yes |
| AC outlets |
|
| DC outlets | 1x 12V 8A (cigarette lighter style) 2x 5V USB port (USB-A) |
| Data center | VFT |
| Indicators | Low oil |
| Fuel tank | Steel, 5 gal |
| Fuel gauge | Yes |
| Weight | 119.5 lbs |
|---|---|
| Approx. dimensions (L x W x H) | 24.8 x 21.7 x 21.7 in |
| Noise (lower limit) | 75 dBA |
| THD | < 25% |
| Compliance | CARB, EPA, ANSI/PGMA G300-2023 |
| Security | Low oil and overload protection, CO monitoring |
| Spark arrestor | Yes |
| Neutral | Bonded to frame |
| Accessories included | Oil, funnel, tool kit, key fob, battery, and wheel kit |
| Country of origin | China |
| Series | Performance |
| UPC | 840876136317 |
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 P03631 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 | AC (10,000 BTU) | 1500 | 2200 |
| Sump pump (1/2 hp) | 1050 | 2150 | |
| Refrigerator (energy star) | 192 | 1192 | |
| Radio | 100 | 100 | |
| Set of 5 LED light bulbs | 55 | 55 | |
| Total | 2897 W | 3997 W | |
| For camping | RV AC (11,000 BTU) | 1010 | 1600 |
| RV refrigerator | 180 | 600 | |
| Electric grill | 1650 | 1650 | |
| Set of 5 LED light bulbs | 55 | 55 | |
| Total | 2895 W | 3485 W | |
| For work | Grinder | 1400 | 2500 |
| Demolition hammer | 1260 | 1260 | |
| Drain cleaner | 250 | 250 | |
| Total | 2910 W | 4010 W |
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