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 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 in need of safely powering high-intensity work or lighting equipment
In the sections ahead, the power characteristics, availability of various outlets, the portability, and any additional features of the device shall be discussed, including its emission compliance information.
Power & Run Time
The Yamaha EF5500DE houses a 358 cc Yamaha MZ360 OHV 4-stroke engine, which provides 120/240V, consumes gasoline and delivers a running wattage of 4500W along with a peak wattage of 5500W.
Enjoying a noise rating of 74.1 dBA (just slightly more noisy than a vacuum cleaner), this generator can be started thanks to a simple traditional pull-start mechanism, but also to a convenient and easy-to-use electric starter (battery included). For additional convenience, the EF5500DE may also be remotely started (separate purchase).
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).
The control panel includes the following 6 AC outlets:
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.
The Yamaha EF5500DE has a conventional, open frame design, of the following dimensions: L21.9 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.
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. However, its challenging mobility is solved by its wheel kit and its folding handle, which will ease its displacement, once it is on the floor.
The generator comes with an additional safety feature, a lift hook on the top of its frame, which is helpful during its transport, loading and unloading.
To help you monitor the EF5500DE's status and activity, its control panel is equipped with a digital data center, giving you information on the lifetime run hours.
In addition to this info, a light indicator serves to show you when the oil level is too low.
A built-in fuel gauge allows for a quick, easy and convenient check of the fuel level of the generator.
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.
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.
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).
- Considering its dry weight of 243.7 pounds, the Yamaha EF5500DE is one of the heavier generators producing between 4000 and 5000 running watts. In terms of weight, one of the champions in their power range is the Pulsar PG5250, standing at just 99.5 lbs.
- As this generator has its lowest possible noise of 74.1 dBA, it should be considered noisier compared to its peers of a comparable 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.
- Since the EF5500DE 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. Concerning the run times, one of the several devices with a comparable output, offering the highest autonomy, is the Dewalt DXGN4500, which is able to run for 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. This generator has an estimated fuel consumption of roughly 0.51 GPH (gallon per hour) at a 50% load, rendering it somewhat average compared to devices of a similar output. If you are concerned with gasoline efficiency, having a fuel consumption of just 0.33 GPH, the Pulsar PG5250B is a device you should look out for.
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
- GFCI Outlets
- Remote start capable
- High run time
- Decent fuel efficiency
- On the expensive side
- On the heavy side (243.7 lbs)
- On the noisy side (74.1 dBA)
Features and Specifications
|Engine||358 cc Yamaha MZ360 OHV 4-stroke|
|Starting system||Recoil, Electric, Remote|
|Voltage||AC: 120/240V 60 Hz|
|Running watts||4500 W|
|Starting watts||5500 W|
|Running amps (@120/240V)||37.5/18.8 amps|
|Peaks amps (@120/240V)||45.8/22.9 amps|
|Run time @50% load||13.5 h|
|Run time @25% load||Unknown|
|Automatic Voltage Regulation||No|
|Data center||Lifetime run hours|
|Fuel tank||Metal, 6.9 gal|
|Approx. dimensions (L x W x H)||21.9 x 29 x 31.5 in|
|Noise (lower limit)||74.1 dBA|
|Security||Low oil and overload protection|
|Neutral||Bonded to frame|
|Accessories included||Tool kit, battery, and wheel kit|
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, it has been reported that many of the newer models are made in China, rather than Japan.
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?
|Item||Running Watts||Starting Watts|
|At home||Sump pump (1/2 hp)||1050||2150|
|Furnace fan (1/2 hp)||875||2350|
|Refrigerator (energy star)||192||1192|
|Total||3587 W||5062 W|
|For camping||Radiant heater||1300||1300|
|Pair of small speakers||45||45|
|Total||3595 W||4015 W|
|For work||Table saw||1800||4500|
|Electric fence (25 miles)||250||250|
|Total||2780 W||5480 W|
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