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Yamaha EF5500DE - 4500/5500W Portable Generator With Electric Start

The Yamaha EF5500DE is a portable open frame generator with a rated wattage of 4,500 W and a starting wattage of 5,500 W. (Read full specs)

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Description

POWER‑PACKED AND LOADED WITH FEATURES. The EF5500 offers the Contractor and home back up customer 5500 watts of power at a great value. (source: Yamaha (opens in a new tab))

Zoom on the Yamaha EF5500DE

In a nutshell, the Yamaha EF5500DE is a portable generator mostly geared towards:

  • RV travellers who wish to upgrade their experience to another level
  • People occasionally participating in sporting competitions, open-air performances and outdoor festivals
  • Homeowners in need of an emergency backup power for their essentials
  • Professionals in need of safely powering high-intensity work or lighting equipment

In the forthcoming sections, you'll delve into its power characteristics, the various outlets it offers, its overall portability, and the additional features it boasts.

Power & Run Time

The Yamaha EF5500DE in use

The Yamaha EF5500DE

Running on gasoline, the Yamaha EF5500DE operates with a 358 cc Yamaha MZ360 OHV 4-stroke engine, delivering 120/240V, with a running wattage of 4,500W and a peak wattage of 5,500W.

The generator features a simple traditional pull-start mechanism and also a simple and elegant electric starter (battery included). It is rated for a noise of 74.1 dBA (just slightly more noisy than a dishwasher).

The EF5500DE's fuel tank, with a capacity of 6.9 gallons, supports uninterrupted operation for around 13.5 hours at 50% load when fully fueled (fuel consumption at an estimated 0.51 gallons per hour).

Considering its relatively high Total Harmonic Distortion (THD) of less than 7%, it is not recommended to rely on the EF5500DE for powering sensitive electronic devices.

Outlets

The control panel features 6 AC outlets as follows:

Two Duplexes 120V 20A (5-20R) GFCI
120V 30A (L5-30R) receptacle
120/240V 30A (L14-30R) receptacle

Even if this Yamaha generator isn't quite RV Ready, it still allows for an easy RV connection via an L5-30P to TT-30R adaptor, thanks to its L5-30R receptacle. Besides, the EF5500DE's twist-lock L14-30R receptacle makes it transfer switch ready, enabling hassle-free connection to your breaker box for powering your home during outages.

Portability

Measuring L29.1 x W29 x H31.5 in, the classic open frame build of the Yamaha EF5500DE delivers stability and easy maintenance access to components, facilitating air circulation. This type of design is ideal for tough environments and heavy outdoor use.

Despite its weight of 238.1 lbs, the generator is considered 'portable,' signifying its capability to be moved, albeit its heaviness may hinder easy transport. Nevertheless, thanks to its wheel kit and its folding handle (a decent solution to its lack of maneuverability), the generator can be easily moved, once placed the ground.

A lift hook located on the top of the frame offers an additional safety feature while facilitating the transport, loading and unloading of the generator.

Features

Panel of the Yamaha EF5500DE

The EF5500DE's control panel

Monitoring of the EF5500DE's status and activity is made possible by a digital data center, which provides information on the lifetime run hours and voltage and is one of the features of its control panel.

In addition to this info, a light indicator allows you to instantly see if the oil level is too low.

The generator allows for a quick, easy and convenient assessment of its gas level, as it is equipped with a built-in fuel gauge.

Considering security aspects, the generator boasts an overload protection (circuit breaker) and an automatic low oil shut-off (Oil Watch system), offering peace of mind throughout operation.

Yamaha's Oil Watch warning system gives you an extra peace of mind. This feature enhances long-term durability by preventing engine damage and costly repairs. Once the oil begins to run low, the generator automatically shuts off and cannot be re-started until oil is added.

It also includes a carbon monoxide sensor. This sensor is designed to monitor the level of carbon monoxide present during the generator's operation. If the generator is positioned incorrectly and carbon monoxide levels rise to an unsafe level, the generator will automatically shut down.

Alongside the typical set of documentation and the user manual to assist with setup, Yamaha has included accessory] in the packaging of the EF5500DE.

Product Video

The Yamaha EF5500DE versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Yamaha EF5500DE compare to generators of similar power (between 4000 and 5000 W).

  • Weighing in at 238.1 lbs, the Yamaha EF5500DE is one of the heaviest generators available in the 4000-5000 rated wattage segment. If weight is an important consideration for you, the WEN 56477i stands out as one of the top contenders in this power category, with a dry weight of 72.7 pounds.
  • This generator, with its lowest noise level at 74.1 dBA, is noisier than most generators of comparable running wattage. If noise is a concern for you, you could consider the Yamaha EF4500iSE, which is one of the least noisy generators in its power range, rated at 58 dBA.
  • The EF5500DE provides a higher run time than similarly powerful devices, reaching around 13.5 hours at 50% load. Concerning the run times, one of the several devices with a comparable output, offering the highest autonomy, is the NorthStar c5500, which is able to run for around 15.1 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. This generator doesn't excel in fuel efficiency when compared to others of its kind: it consumes approximately 0.51 GPH at a 50% load. If you wish to acquire one of the most gasoline efficient products of this power range, the WEN DF480iX, with a fuel consumption of 0.27 GPH could be in your good books.

The bottom line

STRENGTHS:
  • CO Sensor
  • GFCI Outlets
  • Electric start
  • High run time
WEAKNESSES:
  • No remote start
  • On the heavy side (238.1 lbs)
  • On the noisy side (74.1 dBA)
  • Low fuel efficiency

Do you own the Yamaha EF5500DE 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 readyNo
FuelGasoline
Engine358 cc Yamaha MZ360 OHV 4-stroke
Starting systemRecoil, Electric
Warranty3 years
Power
VoltageAC: 120/240V 60 Hz
Running watts4,500 W
Starting watts5,500 W
Running amps (@120/240V)37.5/18.8 amps
Peak amps (@120/240V)45.8/22.9 amps
Run time @50% load13.5 h
Run time @25% loadUnknown
Features
GFCI outletsYes
Covered outletsNo
Automatic Voltage RegulationYes
AC outlets
  • 2x Duplex 120V 20A (5-20R) GFCI
  • 1x 120V 30A (L5-30R)
  • 1x 120/240V 30A (L14-30R)
DC outletsNo
Data centerLifetime run hours and voltage
IndicatorsLow oil
Fuel tankMetal, 6.9 gal
Fuel gaugeYes
Misc
Weight238.1 lbs
Approx. dimensions (L x W x H)29.1 x 29 x 31.5 in
Noise (lower limit)74.1 dBA
THD< 7%
ComplianceCARB, EPA
SecurityLow oil and overload protection, CO monitoring
Spark arrestorYes
NeutralBonded to frame
Accessories includedTool kit, battery, and wheel kit
Country of originChina
SeriesIndustrial
Other model numbersEF55DEX
UPC765053823098

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 Yamaha

With a rich history of over 130 years, the Japanese based Yamaha Corporation, founded in 1887, has tipped its fingers in every industry imaginable, most notably motorcycles, musical instruments and electronics. The company boasts with a wide range of products, including many of the top rated portable generators. However, many of their models are made in China, rather than Japan.

Warranty Information

The Yamaha EF5500DE 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 Yamaha generators, please consult Yamaha's warranty policies (opens in a new tab). Alternatively, you can also contact their Customer Support: 1-800-962-7926.

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 size calculator.
ItemRunning WattsStarting Watts
At homeDish washer15003000
AC (10,000 BTU)15002200
Refrigerator (energy star)1921192
Blender400850
Total3592 W5092 W
For campingRV AC (11,000 BTU)10101600
RV refrigerator180600
Hair dryer18001900
Coffee maker600600
Total3590 W4180 W
For workTable saw18004500
Reciprocating saw730960
Electric fence (25 miles)250250
Total2780 W5480 W

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