Zoom on the Yamaha EF5500D
In summary, the Yamaha EF5500D is a portable generator especially useful for:
- RV travellers looking for even more independence
- People occasionally participating in outdoor fairs, festivals or events
- 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 EF5500D'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 4,500W and a peak wattage of 5,500W.
The generator features a conventional pull-start mechanism. It is rated for a noise of 74.1 dBA (just slightly more noisy than a dishwasher).
With a fuel capacity of 6.9 gallons, the EF5500D may run for around 13.5 hours at 50% load with a full tank (fuel consumption around 0.51 GPH).
The EF5500D is unsuitable for the powering of sensitive electronic devices due to its relatively high THD (<7%).
The control panel provides the upcoming 6 AC outlets:
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, because the EF5500D is equipped with a twist-lock L14-30R receptacle, it is transfer switch ready: it can power your home during a power outage, as it can be easily connected to your breaker box to power your household.
The Yamaha EF5500D 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 generator is designed for ideal use outdoors and in rough environments.
Since the generator weighs 216.1 lbs, it will be incredibly difficult to manually lift it and transport it, even though it is technically considered to 'be portable' (in the sense that it is movable). Still, once it is on the ground, its wheel kit and its folding handle can easily solve the issue of low mobility and allow for easy relocation of the device.
Further safety during transport, loading and unloading of the device is provided by a lift hook, which is placed on the top of the generator's frame.
The control panel of the EF5500D includes a digital data center, which assists you in monitoring its status and activity, as it provides information on the voltage and lifetime run hours.
In addition to this info, a light indicator serves to show you when the oil level is too low.
Thanks to a built-in fuel gauge, the generator allows you to quickly, conveniently and easily check the gas level at a glance.
Security-wise, this product benefits from an overload protection (circuit breaker) and an automatic low oil shut-off (Oil Watch system), which gives you a complete peace of mind when using it.
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 EF5500D's packaging.
The Yamaha EF5500D 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.
The Yamaha EF5500D versus other generators
The following charts are provided to give you an idea of how some of the key specs of the Yamaha EF5500D compare to generators of similar power (between 4000 and 5000 W).
- As its dry weight is 216.1 pounds, the Yamaha EF5500D is one of the heavier 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.
- Among the generators of a comparable running wattage, this generator with a lowest noise of 74.1 dBA can be judged as noisy. 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 Yamaha EF4500iSE, whose lowest noise levels reach just 58 dBA.
- Since the EF5500D boasts with a run time of around 13.5 hours at 50% load, it can be safely judged as a device of a higher run time than most generators of a comparable output. Furthermore, considering the run times, one of the generators which have a roughly same power output, with the highest autonomy, is the Dewalt DXGN4500, as it provides around 15 hours.
- While the run time is an important parameter, it is dependent on the fuel tank’s capacity and thus, doesn’t say much on its own unless we consider fuel consumption as well. In fact, this generator is not among the most fuel efficient, within the aforementioned wattage range : its estimated gasoline consumption at 50% load is around 0.51 GPH. If you are concerned with gasoline efficiency, having a fuel consumption of just 0.27 GPH, the WEN 56477i is a device you could look out for.
As you can see from this interactive chart, when compared to other 4000-5000W generators, the Yamaha EF5500D 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
- CO Sensor
- GFCI Outlets
- High run time
- On the expensive side
- No electric start
- On the heavy side (216.1 lbs)
- On the noisy side (74.1 dBA)
- Low fuel efficiency
Features and Specifications
|Engine||358 cc Yamaha MZ360 OHV 4-stroke|
|Voltage||AC: 120/240V 60 Hz|
|Running watts||4,500 W|
|Starting watts||5,500 W|
|Running amps (@120/240V)||37.5/18.8 amps|
|Peak amps (@120/240V)||45.8/22.9 amps|
|Run time @50% load||13.5 h|
|Run time @25% load||Unknown|
|Automatic Voltage Regulation||Yes|
|AC outlets|| |
|Data center||Lifetime run hours and voltage|
|Fuel tank||Metal, 6.9 gal|
|Approx. dimensions (L x W x H)||29.1 x 29 x 31.5 in|
|Noise (lower limit)||74.1 dBA|
|Security||Low oil and overload protection, CO monitoring|
|Neutral||Bonded to frame|
|Accessories included||Tool kit and wheel kit|
|Country of origin||China|
|Other model numbers||EF55DZ1|
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.
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.
The Yamaha EF5500D 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?
|Item||Running Watts||Starting Watts|
|At home||Electric fry pan||1500||1500|
|Refrigerator (energy star)||192||1192|
|Total||3592 W||5092 W|
|For camping||RV AC (11,000 BTU)||1010||1600|
|Total||3590 W||4180 W|
|For work||Table saw||1800||4500|
|Electric fence (25 miles)||250||250|
|Total||2780 W||5480 W|
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