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Yamaha EF5500DE Spec Review

The Yamaha EF5500DE is an open frame portable generator with a rated wattage of 4500 W and a starting wattage of 5500 W.

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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 wishing to enhance their freedom and nomad lifestyle
  • People occasionally participating in sporting competitions, open-air performances and outdoor festivals
  • Homeowners who want to be able to use the most necessary devices in their household, even during a blackout
  • Professionals who want to ensure that a power failure will not prevent them from working

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 core is the 358 cc Yamaha MZ360 OHV 4-stroke engine, which runs on gasoline. With an output of 120/240V, it provides a running wattage of 4500W and a peak wattage of 5500W.

The generator features a conventional 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 shower). The EF5500DE can also be remotely started, offering further convenience (separate purchase).

With a full tank, the EF5500DE can operate for around 13.5 hours at 50% load (fuel consumption around 0.51 GPH), thanks to its fuel capacity of 6.9 gallons.

Outlets

The control panel features the following 6 AC outlets:

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, as it features a twist-lock L14-30R receptacle, the EF5500DE is transfer switch ready: in case of a power outage, you will be easily able to connect it to a breaker box and power your household.

Portability

The dimensions of the Yamaha EF5500DE, which are L21.9 x W29 x H31.5 in, and its typical, open frame design provides stability and enables the generator to be raised above ground level. The featured design is ideal for the outdoors and all tough environments.

Although this generator is technically considered 'portable' (in the sense that it can be moved), its 243.7 lbs make it incredibly difficult to manually lift and transport. Nevertheless, it can still be moved quite conveniently with the help of its wheel kit and its folding handle, once it is placed on the ground.

A lift hook, which is on the top of the frame, serves as an extra safety feature for the transport, unloading and loading of the device.

Features

Panel of the Yamaha EF5500DE

The EF5500DE's control panel

A digital data center, one of the features of the EF5500DE’s control panel, gives you information on the lifetime run hours, and thus, is helpful for the monitoring of its activity and status.

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

The generator includes a built-in fuel gauge, a quick, easy and convenient method of checking the device’s gas level.

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

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.

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 and therefore, can be used 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).

  • With its weight of 243.7 lbs, the Yamaha EF5500DE is one of the heavier generators in the 4000-5000 rated wattage category. If you are concerned by weight, one of the champions in the above mentioned power range is the Pulsar PG5250, with a dry weight of just 99.5 pounds.
  • If compared to generators capable of producing a similar running wattage, this generator with a lowest emitted noise of 74.1 dBA can be considered somewhat noisy. If noise emissions are one of your priorities, you may be interested in the Yamaha EF4500iSE, one of the least noisy generators similarly powerful as this one, rated for 58 dBA.
  • The EF5500DE provides a higher run time than similarly powerful devices, reaching around 13.5 hours at 50% load. If autonomy is your priority, one of the devices of a similar power output with the highest run time is the Dewalt DXGN4500, reaching around 15 hours.
  • Even though run times are undoubtedly important, they are dependent on the fuel capacity to a large extent. For a more wholesome picture, we must take into consideration the fuel consumption of the generator. This generator reaches an estimated fuel consumption of 0.51 GPH (gallon per hour) at a 50% load, making it average, for the previously mentioned wattage range. If you wish to further improve in the area of fuel efficiency, the Pulsar PG5250B, which boasts with a gas consumption of only 0.33 GPH, may be the right generator for you.

Price comparison

As you can see from this interactive chart, when compared to other 4000-5000W generators, the Yamaha EF5500DE is on the expensive side of the price range.

While certainly not the cheapest of its kind, purchasing it would most likely also mean enjoying the reliability of a high-end product.

The bottom line

STRENGTHS:
  • GFCI Outlets
  • Remote start capable
  • High run time
AVERAGE SPECS:
  • Decent fuel efficiency
WEAKNESSES:
  • On the expensive side
  • On the heavy side (243.7 lbs)
  • On the noisy side (74.1 dBA)

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
PortableYes
Parallel capableNo
RV readyNo
FuelGasoline
Engine358 cc Yamaha MZ360 OHV 4-stroke
Starting systemRecoil, Electric, Remote
Power
VoltageAC: 120/240V 60 Hz
Running watts4500 W
Starting watts5500 W
Running amps (@120/240V)37.5/18.8 amps
Peaks amps (@120/240V)45.8/22.9 amps
Run time @50% load13.5 h
Run time @25% loadN/A
Features
GFCI outletsYes
Covered outletsNo
Automatic Voltage RegulationNo
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
IndicatorsLow oil
Fuel tankMetal, 6.9 gal
Fuel gaugeYes
Misc
Weight243.7 lbs
Approx. dimensions (L x W x H)21.9 x 29 x 31.5 in
Noise (lower limit)74.1 dBA
THDN/A
EmissionsCARB, EPA
SecurityLow oil and overload protection
Spark arrestorYes
NeutralBonded to frame
Accessories includedTool kit and battery
Warranty3 years
SeriesIndustrial

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.

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, it has been reported that many of the newer 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
Microwave (1000 watts)15001500
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
Drain cleaner250250
Total2780 W5480 W

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