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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 summary, the Yamaha EF5500DE is a portable generator especially useful for:

  • RV travellers who wish to upgrade their experience to another level
  • 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
  • Professionals who want to be able to deliver results, even during a power failure

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 Yamaha EF5500DE in use

The Yamaha EF5500DE

The Yamaha EF5500DE's engine, 358 cc Yamaha MZ360 OHV 4-stroke, fueled by gasoline, can deliver 120/240V. It provides a running wattage of 4,500W and reaches a peak wattage of 5,500W.

With a noise rating of 74.1 dBA (just slightly more noisy than a vacuum cleaner), the generator features a simple traditional pull-start mechanism, but also a convenient and easy-to-use electric starter (battery included).

The fuel capacity of 6.9 gallons allows the EF5500DE to operate for around 13.5 hours at 50% load with a full tank (fuel consumption around 0.51 GPH).

Since the EF5500DE has a somewhat high THD (<7%), it is advisable to not use it for the powering of sensitive electronic devices.

Outlets

The control panel provides the upcoming 6 AC outlets:

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

While this Yamaha generator is not RV Ready, its L5-30R receptacle can be used for a simple RV connection with an L5-30P to TT-30R adaptor. Besides, since the EF5500DE bears a twist-lock L14-30R receptacle, it is transfer switch ready: it is easily connectible to a breaker box and can power your home in case of a power outage.

Portability

The Yamaha EF5500DE has a conventional, open frame design, of the following dimensions: L29.1 x W29 x H31.5 in, which offers support and allows it to be raised above ground level. The featured design is ideal for the outdoors and all tough environments.

As the generator's weight is 238.1 pounds, manually moving it or transporting it may be challenging, despite the fact that it is technically considered 'portable' (movable). However, this lack of maneuverability is compensated by its wheel kit and its folding handle, with which you can conveniently shift it, once it's on 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 its oil levels are insufficient.

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

From a security point of view, the generator is equipped with an automatic low oil shut-off (Oil Watch system) and an overload protection (circuit breaker), giving you a peace of mind during use.

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.

Besides the usual set of documentation and owner's manual (opens in a new tab) to get you promptly started, Yamaha also included a tool kit in the EF5500DE's packaging.

Emissions

The Yamaha EF5500DE is EPA-approved and CARB-compliant. It can therefore be sold and purchased in all 50 states, including California.

Moreover, it features a spark arrestor, which makes it suitable for use in forested areas.

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).

  • As its dry weight is 238.1 pounds, the Yamaha EF5500DE is one of the heaviest of the products which can generate 4000 to 5000 running watts. If weight matters to you, one of the champions in this power range is the WEN 56477i with only 72.7 pounds.
  • This generator, with its lowest possible noise rated at 74.1 dBA falls into the more noisy category, compared to other devices of a similar running wattage. If you are concerned with noise, check out the Yamaha EF4500iSE, which is one of the least noisy generators in its power range, with a noise rating of just 58 dBA.
  • With a run time of around 13.5 hours at 50% load, the EF5500DE has one of the higher run times, compared to its similarly powerful peers. 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 NorthStar c5500, with 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 is not fuel efficient compared to devices of similar output: its estimated fuel consumption stands at 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 56477i, 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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