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)
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Description
Adventure seekers trust the FIRMAN P03628 portable generator for safe, reliable, long-lasting, and efficient power.
Zoom on the Firman P03628
To sum up, the Firman P03628 is a portable generator tailored 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
The following sections will present you in detail its power characteristics, the different outlets it offers, its overall portability, and the extra features it benefits from.
Power & Run Time
Running on gasoline, the Firman P03628 utilizes a 208 cc Firman Max-Pro Series OHV 4-stroke engine with cast iron sleeve to deliver 120V, offering a running wattage of 3,650W and a starting wattage of 4,550W.
The generator, rated for a noise of 75 dBA (just slightly more noisy than a dishwasher), provides flexibility in starting, offering both a standard recoil pull-rope starting mechanism and a simple and elegant electric starter (battery included). For additional convenience, the P03628 may also be remotely started (key fob included).
With its 5 gallons fuel tank, the P03628 can operate for around 14 hours at 50% load when fully fueled (with fuel usage averaging around 0.36 GPH).
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 4 AC outlets as follows:
Thanks to its TT-30R receptacle (TT meaning 'Travel Trailer'), this Firman generator is RV Ready, ready to power your recreational vehicle with ease.
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 generator is designed for ideal use outdoors and in rough environments.
Despite its weight of 119.5 lbs, the generator is still considered 'portable,' meaning it is movable, although its heftiness may restrict portability in certain environments or require additional considerations for transportation and setup. However, its challenging mobility is solved by its wheel kit (⌀8") and its folding handle, which will ease its displacement, once it is on the floor.
Features
Integrated into the control center of the P03628 are a convenient meter, providing voltage, frequency, and lifetime hours data, facilitating the monitoring of its status and activity.
In addition to this info, a light indicator allows you to instantly see if its oil levels are insufficient.
Equipped with a built-in fuel gauge, the generator facilitates swift gas level checks.
From a security point of view, the generator is equipped with an automatic low oil shut-off and an overload protection (circuit breaker), giving you a peace of mind during use.
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.
Alongside the standard documentation and an owner's manual (opens in a new tab) for quick setup, the Firman P03628 is bundled with additional accessories: key fob, funnel, oil and tool kit.
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).
- Having a dry weight of 119.5 lbs, the Firman P03628 belongs in the expected weight range for generators which produce 3500 to 4500 rated watts. If weight is a key factor for your needs, the WEN 56432iX is noteworthy for being one of the top contenders in this power range, with a dry weight of 52.9 pounds.
- When compared to other units producing a similar running wattage, this generator and its lowest emitted noise of 75 dBA stand out for being on the louder side. If noise is a concern for you, you could consider the Westinghouse iGen5000DF, which is one of the least noisy generators in its power range, rated at 52 dBA.
- Since the P03628 boasts with a run time of around 14 hours at 50% load, it can be safely judged as a device of a higher run time than most generators of a comparable output. For those prioritizing autonomy, the NorthStar c5500 could be considered, as it offers one of the longest run times among generators with similar power output, reaching around 15.1 hours.
- Run time is a key metric, but it's dependent on the generator's fuel tank capacity. Therefore, discussing fuel efficiency is necessary for a complete understanding. With an estimated fuel consumption of 0.36 GPH at a 50% load, this generator aligns with the average gasoline usage range of comparable products. If not satisfied with the afore-mentioned fuel consumption, you may wish to check out the Westinghouse iGen5000DF. With a fuel consumption of as little as 0.23 GPH, it is one of the most efficient generators currently on the market.
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.


