Zoom on the Yamaha EF4500iSE
In summary, the Yamaha EF4500iSE is a quiet portable inverter generator especially useful for:
- RV travellers who wish to upgrade their experience to another level
- People occasionally participating in sporting competitions, open-air performances and outdoor festivals
- Homeowners who want to be sure of their ability to power their fridges, cooking tools, heating and lighting equipment during power failures
- Camping and tailgating hobbyists looking for a portable power source
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 EF4500iSE houses a 357 cc Yamaha MZ360 OHV 4-stroke engine, which provides 120V, consumes gasoline and delivers a running wattage of 4000W along with a peak wattage of 4500W.
At a noise rating of 58 dBA (less noisy than a conversation at home), the inverter generator is started via a convenient and easy-to-use electric starter (battery included). The EF4500iSE can also be remotely started, offering further convenience (separate purchase).
This generator features Yamaha's Smart Throttle™. This load-sensing feature automatically adjusts engine speed to match its load in order to offer greater fuel efficiency and noise reduction.
Thanks to a fuel capacity of 4.5 gallons, the EF4500iSE can operate for up to 15.2 hours with a full tank (fuel consumption around 0.3 GPH).
As the EF4500iSE produces a clean sine wave, with a <3% Total Harmonic Disruption (THD), sensitive electronics may be plugged in the AC outlets safely.
The control panel provides the upcoming 3 AC outlets:
This Yamaha generator features an L5-30R receptacle, enabling an easy RV connection via an L5-30P to TT-30R adaptor. However, it is still not quite RV ready.
Since the Yamaha EF4500iSE is an inverter generator, its closed design (L30.7 x W24.3 x H27.8 in) has an esthetical advantage over conventional, open frame devices. The generator has a contemporary design, convenient for recreationally generating power.
As the generator's weight is 194 pounds, manually moving it or transporting it may be challenging, despite the fact that it is technically considered 'portable' (movable). Still, once it is on the ground, its set of 4 wheels and its double handle can easily solve the issue of low mobility and allow for easy relocation of the device.
A digital data center, one of the features of the EF4500iSE'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, several light indicators serve to show you when the generator is on overload, the generator is ready and its oil levels are insufficient.
A built-in fuel gauge allows for a quick, easy and convenient check of the fuel level of the inverter generator.
From a security standpoint, the product offers an automatic low oil shut-off (Oil Watch system) and an overload protection (circuit breaker), allowing you to use it with a peace of mind.
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.
As for its accessories, apart from the previously mentioned features, the Yamaha EF4500iSE also comes with the basic documentation and an owner's manual (opens in a new tab), allowing you to start it right away.
The Yamaha EF4500iSE is EPA-approved and CARB-compliant. Thus, selling and purchasing this generator is allowed in each of the 50 states, including California.
Moreover, it features a spark arrestor and thus, may be used in forested areas.
The Yamaha EF4500iSE versus other generators
The following charts are provided to give you an idea of how some of the key specs of the Yamaha EF4500iSE compare to generators of similar power (between 3500 and 4500 W).
- A weight of 194 lbs makes the Yamaha EF4500iSE one of the heavier devices in the 3500-4500 rated wattage range. If weight matters to you, one of the champions in this power range is the WEN GN400i with only 66.1 pounds.
- At a lowest noise rating of 58 dBA, this inverter generator is one of the quieter devices of similar power. If noise emissions are important to you, one of the least noisy generators of this power range is the Cummins Onan P4500i with only 52 dBA.
- Autonomy-wise, with up to 15.2 hours on a full tank at a 25% load, the EF4500iSE is on the low end when compared to other generators of a similar power output. Concerning the run times, one of the several devices with a comparable output, offering the highest autonomy, is the Champion 200954, which is able to run for up to 22 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. Compared to its peers, this inverter generator is not exactly fuel efficient, compared to similarly powerful devices, with an estimated fuel consumption of 0.3 GPH at a 25% load. If fuel consumption is your top priority, we suggest to check out the Westinghouse iGen4200, which has a fuel consumption of only 0.14 GPH and thus, is one of the most efficient devices in our database.
As you can see from this interactive chart, when compared to other 3500-4500W generators, the Yamaha EF4500iSE 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
- Remote start capable
- Quiet for its power (58 dBA)
- On the expensive side
- No recoil back-up
- No parallel ports
- On the heavy side (194 lbs)
- Relatively low run time
- Low fuel efficiency
Features and Specifications
|Engine||357 cc Yamaha MZ360 OHV 4-stroke|
|Starting system||Electric, Remote|
|Voltage||AC: 120V 60 Hz|
|Running watts||4000 W|
|Starting watts||4500 W|
|Running amps||33.3 amps|
|Peaks amps||37.5 amps|
|Run time @50% load||Unknown|
|Run time @25% load||15.2 h|
|Automatic Voltage Regulation||Inverter|
|AC outlets|| |
|Data center||Lifetime run hours|
|Indicators||Low oil, overload and output ready|
|Fuel tank||Plastic, 4.5 gal|
|Approx. dimensions (L x W x H)||30.7 x 24.3 x 27.8 in|
|Noise (lower limit)||58 dBA|
|Security||Low oil and overload protection|
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 EF4500iSE 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|
|Microwave (1000 watts)||1500||1500|
|Refrigerator (energy star)||192||1192|
|Total||3192 W||4192 W|
|For camping||RV AC (11,000 BTU)||1010||1600|
|Total||3190 W||3780 W|
|Electric fence (25 miles)||250||250|
|Total||3160 W||4260 W|
Is it made in China? (Asked November 10, 2020)
The EF4500 is made in Japan.
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