Firman P03628 - 3650/4550W Portable Generator With Remote Start
The Firman P03628 is a portable open frame generator with a rated wattage of 3,650 W and a starting wattage of 4,550 W. (Read full specs)
Page Content
Description
Adventure seekers trust the FIRMAN P03628 portable generator for safe, reliable, long-lasting, and efficient power.
Zoom on the Firman P03628
In a few words, the Firman P03628 is a portable generator perfectly suited for:
- RV travellers wishing to enhance their freedom and nomad lifestyle
- People occasionally participating in sporting competitions, open-air performances and outdoor festivals
- Homeowners who want to be able to use the most necessary devices in their household, even during a blackout
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 P03628 houses a 208 cc Firman Max-Pro Series OHV 4-stroke engine with cast iron sleeve, which provides 120V, consumes gasoline and delivers a running wattage of 3,650W along with a peak wattage of 4,550W.
The generator features a standard recoil pull-rope starting mechanism and also an easy-to-use and reliable electric starter (battery included). It is rated for a noise of 75 dBA (just slightly more noisy than a shower). Furthermore, for added convenience, the P03628 offers remote starting capabilities (key fob included).
The P03628 can operate for around 14 hours at 50% load with a full tank (fuel consumption around 0.36 GPH), due to its fuel capacity of 5 gallons.
Due to the high THD (<25%) of the P03628, it is advised against using it for powering sensitive electronic devices.
Outlets
The control panel features the following 4 AC outlets:
Thanks to its TT-30R receptacle (TT stands for 'Travel Trailer'), this Firman generator is RV Ready.
Portability
Measuring L23.2 x W21.7 x H21.7 in, the Firman P03628 showcases a classic open frame layout, offering stability and simple maintenance access to components, while facilitating air circulation. The design is ideal for rough environments and demanding outdoor use.
Although this generator is technically considered 'portable' (in the sense that it can be moved), its 119.5 lbs make may make it challenging to manually lift and transport. Still, once it is on the ground, its wheel kit (⌀8") and its folding handle can easily solve the issue of low mobility and allow for easy relocation of the device.
Features
The P03628's control center features a convenient meter showing you voltage, frequency and lifetime hours to aid you with the monitoring of its status and activity.
In addition to this info, a light indicator shows you if its oil levels are insufficient.
The inclusion of a built-in fuel gauge in the generator streamlines gas level checks for quick and convenient assessments.
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 P03628 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.
While the standard documentation and an owner's manual (opens in a new tab), helpful for starting the device promptly, come with the Firman P03628, the following accessories are also included: key fob, tool kit, funnel and oil.
The Firman P03628 versus other generators
The following charts are provided to give you an idea of how some of the key specs of the Firman P03628 compare to generators of similar power (between 3500 and 4500 W).
- As its weight is 119.5 pounds, the Firman P03628 falls in the expected weight range of the devices in the 3500-4500 rated wattage category. Regarding dry weight, one of the champions in the same power range is the WEN 56432iX, with a dry weight of only 52.9 lbs.
- When comparing it to devices with a similar running wattage, this generator's lowest noise level of 75 dBA puts it alongside the noisier units. 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.
- Thanks to an impressive running time of around 14 hours at 50% load, the P03628 benefits from a higher run time than many generators of a similar output. If run time is one of your main concerns, the Firman W03663OF could be worth looking at. It boasts one of the highest run times among units of comparable power, lasting around 18 hours.
- While run time is vital, it hinges on the fuel capacity. To grasp the full picture, we must also factor in fuel efficiency. With a fuel usage of about 0.36 GPH at a 50% load, this generator falls within the typical gasoline consumption range observed in comparably powerful products. If you wish to further improve in the area of fuel efficiency, the Westinghouse iGen5000DF, which boasts with a gas consumption of only 0.23 GPH, may be the right generator for you.
Price comparison
As you can see from these interactive charts, when compared to other 3500-4500W generators, the Firman P03628 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 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, cast iron sleeve |
| Starting system | Recoil, Electric, Remote |
| Warranty | 3 years |
| Voltage | AC: 120V 60 Hz |
|---|---|
| Running watts | 3,650 W |
| Starting watts | 4,550 W |
| Running amps | 30.4 amps |
| Peak amps | 37.9 amps |
| Run time @50% load | 14 h |
| Run time @25% load | Unknown |
| GFCI outlets | No |
|---|---|
| Covered outlets | Yes |
| Automatic Voltage Regulation | Yes |
| AC outlets |
|
| DC outlets | No |
| 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) | 23.2 x 21.7 x 21.7 in |
| Noise (lower limit) | 75 dBA |
| THD | < 25% |
| Compliance | EPA, ANSI/PGMA G300-2023 |
| Security | Low oil and overload protection, CO monitoring |
| Spark arrestor | Yes |
| Neutral | Floating |
| Accessories included | Oil, funnel, tool kit, key fob, battery, and wheel kit |
| Country of origin | China |
| Series | Performance |
| UPC | 840876136287 |
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 P03628 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 | |
| Total | 2892 W | 3892 W | |
| For camping | Radiant heater | 1300 | 1300 |
| RV refrigerator | 180 | 600 | |
| RV AC (11,000 BTU) | 1010 | 1600 | |
| Blender | 400 | 850 | |
| Total | 2890 W | 3480 W | |
| For work | Table saw | 1800 | 4500 |
| Total | 1800 W | 4500 W |
Duplex 120v/20a outlets - does that mean 20a total from both or total 40a possible? (Asked September 25, 2020)
20A total from the duplex outlets
Wath is the oil capacity of a firman 3650 (Asked September 18, 2021)
Engine oil capacity is 20.3 fl.oz.
Couldn't find the right answer for you? Ask your own question.


