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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. (source: Firman (opens in a new tab))

Zoom on the Firman P03628

In summary, the Firman P03628 is a portable generator especially useful for:

  • RV travellers who wish to upgrade their experience to another level
  • People occasionally participating in sporting competitions, open-air performances and outdoor festivals
  • Homeowners who want to be sure of their ability to power their fridges, cooking tools, heating and lighting equipment during power failures

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, which provides 120V, consumes gasoline and delivers a running wattage of 3,650W along with a peak wattage of 4,550W.

Featuring a noise rating of 75 dBA (just slightly more noisy than a shower), the generator is equipped with both a standard recoil pull-rope starting mechanism and a convenient and easy-to-use electric starter (battery included) for starting. For additional convenience, the P03628 may also be remotely started (key fob included).

The P03628's fuel tank holds 5 gallons, ensuring uninterrupted operation for around 14 hours at 50% load with a full tank (fuel consumption approximately 0.36 GPH).

Given the P03628's high Total Harmonic Distortion (THD) of less than 25%, it is advisable to avoid using it to power sensitive electronic devices.

Outlets

The control panel features the upcoming 4 AC outlets:

Duplex 120V 20A (5-20R)
120V 30A (TT-30R) receptacle
120V 30A (L5-30R) receptacle

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 classic open frame construction of the Firman P03628 provides stability while enabling convenient maintenance access to components and adequate air cooling. The device has been designed for tough environments and demanding outdoor use.

Despite its 119.5 lbs, the generator falls under the category of 'portable,' signifying its movability, although its weight may hinder easy portability. 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

Panel of the Firman P03628

The P03628's control panel

To facilitate status and activity monitoring, a convenient meter, providing voltage, frequency, and lifetime hours data are embedded in the control panel of the P03628.

In addition to this info, a light indicator on the device will signal if the oil level is too low.

Equipped with a built-in fuel gauge, the generator facilitates swift gas level checks.

As far as security is concerned, the generator can be used with a peace of mind, as it features an overload protection (circuit breaker) and an automatic low oil shut-off.

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.

With the basic documentation and an owner's manual (opens in a new tab), letting you start the generator quickly, the Firman P03628 also comes with several accessories, including: key fob, oil, tool kit and funnel.

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).

  • Weighing in at 119.5 lbs, the Firman P03628 fits within the expected weight range for devices producing 3500 to 4500 rated watts. If you are concerned by weight, one of the champions in the above-mentioned power range is the Genmax GM4600iAEFIC, with a dry weight of just 58.4 pounds.
  • When compared to devices able to produce a similar running wattage, this generator and its lowest emitted noise of 75 dBA is on the noisier side. If you value reduced noise levels, the Westinghouse iGen4500DF could be worth considering. It's one of the quietest generators in its power range, rated at 52 dBA.
  • 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. For those prioritizing autonomy, the Predator 4375 could be considered, as it offers one of the longest run times among generators with similar power output, reaching around 16 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. 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 you're placing a high priority on fuel consumption, the Westinghouse iGen4500DF, with a low fuel consumption rate of 0.23 GPH, could be an option to consider.

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

STRENGTHS:
  • In the expected price range
  • CO Alert technology
  • Several accessories included
  • RV Ready
  • Remote start
  • High run time
AVERAGE SPECS:
  • Decent weight (119.5 lbs)
  • Decent fuel efficiency
WEAKNESSES:
  • On the noisy side (75 dBA)

Do you own the Firman P03628 and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

General
InverterNo
Parallel capableNo
RV readyYes
FuelGasoline
Engine208 cc Firman Max-Pro Series OHV 4-stroke
Starting systemRecoil, Electric, Remote
Warranty3 years
Power
VoltageAC: 120V 60 Hz
Running watts3,650 W
Starting watts4,550 W
Running amps30.4 amps
Peak amps37.9 amps
Run time @50% load14 h
Run time @25% loadUnknown
Features
GFCI outletsNo
Covered outletsYes
Automatic Voltage RegulationYes
AC outlets
  • 1x Duplex 120V 20A (5-20R)
  • 1x 120V 30A (TT-30R)
  • 1x 120V 30A (L5-30R)
DC outletsNo
Data centerVFT
IndicatorsLow oil
Fuel tankSteel, 5 gal
Fuel gaugeYes
Misc
Weight119.5 lbs
Approx. dimensions (L x W x H)23.2 x 21.7 x 21.7 in
Noise (lower limit)75 dBA
THD< 25%
ComplianceEPA, ANSI/PGMA G300-2023
SecurityLow oil and overload protection, CO monitoring
Spark arrestorYes
NeutralFloating
Accessories includedOil, funnel, tool kit, key fob, battery, and wheel kit
Country of originChina
SeriesPerformance
UPC840876136287

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.

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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?
Examples of items that can be simultaneously powered.
The examples below are based on a maximum load of 80% and estimated wattages. For a more accurate estimation, use our generator sizing calculator.
ItemRunning WattsStarting Watts
At homeDish washer15003000
Refrigerator (energy star)1921192
Vacuum cleaner10751175
Radio100100
Pair of small speakers4545
Total2912 W4412 W
For campingRV AC (11,000 BTU)10101600
RV refrigerator180600
Electric grill16501650
Set of 5 LED light bulbs5555
Total2895 W3485 W
For workTable saw18004500
Total1800 W4500 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.

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