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Predator 4550 - 3650/4550W Open Frame Inverter Generator

The Predator 4550 (59304) is a portable open frame inverter generator with a rated wattage of 3650 W and a starting wattage of 4550 W.

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Predator 4550Predator 4550Predator 4550
Even though the pictures on this product page show wheels, Predator generators sold at Harbor Freight do not come with a wheel kit. It must be purchased separately.
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Price History
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Price history for the Predator 4550
Latest updates:
  • $699.99 - September 17, 2022
  • $649.99 - July 23, 2022
  • $629.99 - April 22, 2022
Data source: harborfreight.com
Since: April 22, 2022
  • Highest Price: $699.99 - September 17, 2022
  • Lowest Price: $629.99 - April 22, 2022

Description

Zoom on the Predator 4550

In a nutshell, the Predator 4550 is a portable inverter generator mostly geared towards:

  • RV travellers looking for even more independence
  • People occasionally participating in sporting competitions, open-air performances and outdoor festivals
  • Homeowners in need of an emergency backup power for their essentials
  • Camping and tailgating hobbyists looking for a portable power source
  • Professionals in need of safely powering high-intensity work or lighting equipment

The following sections will present you in detail its power characteristics, the different outlets it offers, its overall portability, the extra features it benefits from, and any relevant emission compliance details.

Power & Run Time

The Predator 4550 in use

The Predator 4550

The Predator 4550 houses a 223 cc (6.5 hp) OHV 4-stroke engine, which provides 120V, consumes gasoline and delivers a running wattage of 3650W along with a peak wattage of 4550W. Moreover, since it is parallel capable (parallel kit not included), its power may be increased if linked to a second compatible unit.

At a noise rating of 64.6 dBA (just slightly more noisy than an office), the inverter generator is started via a simple traditional pull-start mechanism.

The fuel capacity of 3.72 gallons allows the 4550 to operate for up to 16.1 hours with a full tank (fuel consumption around 0.23 GPH).

Sensitive electronics can be safely plugged in the AC outlets, as the 4550 produces a clean sine wave, with a <5% Total Harmonic Disruption (THD).

Outlets

The control panel provides the upcoming 5 AC outlets:

Two Duplexes 120V 20A (5-20R) GFCI
120V 30A (L5-30R) receptacle

In addition, it provides 2 DC outlets: there's two 5V USB ports (USB-A) with which charging of electronics like mobile phones and tablets is made convenient.

This Predator generator isn't quite RV Ready, but it features an L5-30R receptacle, allowing a simple RV connection through an L5-30P to TT-30R adaptor (included).

Portability

The conventional, open frame design of the Predator 4550 offers stability and allows the generator to be raised above ground level. The generator is designed for ideal use outdoors and in rough environments.

As the 4550's weight is only 77 lbs, it can follow you and your power needs anywhere. Furthermore, the open frame of the generator further helps when holding and moving it to a different place.

It is also possible to purchase the official wheel kit (opens in a new tab) to help you transport this unit more easily.

Features

Panel of the Predator 4550

The 4550's control panel

When the oil level is too low, the generator is overloaded and the generator is ready, you will be informed by the featured light indicators.

A built-in fuel gauge allows for a quick, easy and convenient check of the fuel level of the inverter generator.

Security-wise, this product benefits from an automatic low oil shut-off and an overload protection (circuit breaker), which gives you a complete peace of mind when using it.

The unit also benefits from the Predator's CO SECURE™ carbon monoxide detection. This system monitors the accumulation of CO gas while the generator is running and will shut off the engine if the levels become dangerously high. It’s a welcomed additional security feature, but don’t forget to always take your generator outside (opens in a new tab).

Besides the classic documentation and an owner's manual (opens in a new tab) to get you promptly started, the Predator 4550 also comes with some accessories: tool kit, funnel and RV adapter are included.

Emissions

The Predator 4550 is EPA-approved and CARB-compliant. Therefore, its sale and purchase are permitted in all of the 50 states, including California.

Moreover, it features a spark arrestor and therefore, can be used in forested areas.

Product Videos

The Predator 4550 versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Predator 4550 compare to inverter generators of similar power (between 3500 and 4500 W).

  • As far as its dry weight is concerned, the Predator 4550 weighs just 77 pounds and thus, it is one of the lighter 3500 to 4500 rated wattage inverter generators. In terms of weight, one of the champions in their power range is the WEN GN400i, standing at just 66.1 lbs.
  • When compared to devices able to produce a similar running wattage, this inverter generator and its lowest emitted noise of 64.6 dBA is on the noisier side. If you’d prefer a less noisy device, one of the most quiet devices, which share the same power range with this one, is the Cummins Onan P4500i, whose lowest noise levels reach just 52 dBA.
  • Given that the 4550 reaches an autonomy of up to 16.1 hours with a full tank and at 25% load, it is placed within the average autonomy range of similarly powerful inverter generators. If you consider autonomy on a single full tank as one of the deciding factors, one of the generators in the same power range that offers the highest run time is the Firman W03661OF, with up to 25 hours.
  • The run time is important, but also hugely depends on the capacity of the fuel tank and doesn't mean much if we don't talk about fuel consumption as well. This inverter generator is rather wasteful, compared to other devices within the aforementioned output range, when it comes to gasoline consumption, as it reaches roughly 0.23 GPH at a 25% load. If you wish to acquire one of the most gasoline efficient products of this power range, the Champion 200988, with a fuel consumption of 0.16 GPH could be in your good books.
According to our stats, the following comparison is pretty popular: Predator 4550 vs Predator 3500.

Price comparison

As you can see from this interactive chart, when compared to other 3500-4500W inverter generators, the Predator 4550 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 SECURE™ technology
  • Several accessories included
  • GFCI Outlets
  • RV adapter included
  • Parallel capable
  • Inverter
  • Lightweight for its kind (77 lbs)
AVERAGE SPECS:
  • Decent run time
WEAKNESSES:
  • No data center
  • No electric start
  • Weak warranty
  • On the noisy side (64.6 dBA)
  • Low fuel efficiency

Do you own the Predator 4550 and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Features and Specifications

General
InverterYes
PortableYes
Parallel capableYes, cable not included
RV readyNo
FuelGasoline
Engine223 cc OHV 4-stroke
Starting systemRecoil
Power
VoltageAC: 120V 60 Hz, DC: 5V
Running watts3650 W
Starting watts4550 W
Running amps30.4 amps
Peak amps37.9 amps
Run time @50% loadUnknown
Run time @25% load16.1 h
Features
GFCI outletsYes
Covered outletsYes
Automatic Voltage RegulationInverter
AC outlets
  • 2x Duplex 120V 20A (5-20R) GFCI
  • 1x 120V 30A (L5-30R)
DC outlets2x 5V USB port (USB-A)
Data centerNo
IndicatorsLow oil, overload and output ready
Fuel tank3.72 gal
Fuel gaugeYes
Misc
Weight77 lbs
Approx. dimensions (L x W x H)Unknown
Noise (lower limit)64.6 dBA
THD< 5%
ComplianceCARB, EPA
SecurityLow oil and overload protection, CO monitoring
Spark arrestorYes
NeutralBonded to frame
Accessories includedFunnel, tool kit, and RV adapter
Warranty90 days
Other model numbers59304
UPC193175465542

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 Predator

Predator portable generators are solely distributed by the Harbor Freight Corporation, which has an impressive list of over 200 trademarked products. The Predator brand is one of their newer lines of outdoor power products. As with many other makes and models of power equipment sold by Harbor Freight, Predator generators are manufactured in China.

Warranty Information

The Predator 4550 is covered under a warranty for up to 90 days. This warranty may be limited and may not cover all parts of the generator.
For more information about the warranty of Predator generators, please consult Harbor Freight's warranty policies stated in the user manual (opens in a new tab). Alternatively, you can also contact their Customer Support : 1-800-444-3353.

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 homeElectric fry pan15001500
Refrigerator (energy star)1921192
Vacuum cleaner10751175
Game console150150
Total2917 W3917 W
For campingRV AC (11,000 BTU)10101600
RV refrigerator180600
Electric grill16501650
Set of 5 LED light bulbs5555
Cell phone charger2020
Total2915 W3505 W
For workTable saw18004500
Total1800 W4500 W

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Predator 4550
4.8 Total Score
2 reviews
Add your review
Price
6.5
Value
4
Quality
3.5
Performance
5

User Reviews

Most Recent Most Helpful Highest Rating Lowest Rating Add your review
  1. 3.65
    Price
    100
    Value
    50
    Quality
    50
    Performance
    90

    I’m really an anti-China consumer; but, there is nothing else available to date. I bought the Predator 4550 as a an interim solution. I’ll just have to wait for Honda to fill the gaps in this Amperage range. Pros: This Predator model has; a great price point, is moderately quiet, and easy to start. It simultaneously runs my 15000BTU AC, 1500W convection/micro, and coffee pot. Cons: It’s China and the longevity is up for grabs, no hour meter, no oil filter, and you have to purchase the weel kit extra.

    + PROS:
    • Pricepoint, nationwide repair network, moderately quiet, works as specified
    - CONS:
    • Chinese, no hour meter, no oil filter.
    Helpful(3) Unhelpful(0)You have already voted this
  2. Avatar
    Derrick Durocher March 24, 2022 at 12:05 pm
    1.15
    Price
    30
    Value
    30
    Quality
    20
    Performance
    10

    Max amps are 23 amps and will not start a 15K RV A/C. Exchanged for a welder so not to pay the 20% restocking fee.

    + PROS:
    • Cheap
    - CONS:
    • Not enough starting amps
    Helpful(0) Unhelpful(7)You have already voted this

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