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Yamaha EF4500iSE Spec Review

Picture 1 of the Yamaha EF4500iSE
Picture 2 of the Yamaha EF4500iSE
Picture 3 of the Yamaha EF4500iSE

The Yamaha EF4500iSE is a quiet portable inverter generator with a rated wattage of 4000 W and a starting wattage of 4500 W.

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Description

MAXIMUM EFFICIENCY ‑ MINIMUM NOISE. The powerful engine allows this inverter to run at very low engine speed, reducing fuel consumption, noise, vibration and wear. (source: Yamaha)

Zoom on the Yamaha EF4500iSE

In summary, the Yamaha EF4500iSE is a quiet portable inverter generator especially useful for:

  • RV travellers wishing to enhance their freedom and nomad lifestyle
  • Homeowners in need of an emergency backup power for their essentials
  • Camping and tailgating buffs looking to enhance their experience

In the following paragraphs, we shall explore the power characteristics, available outlets, portability and any additional features of the device, along with its emission compliance parameters.

Power & Run Time

The Yamaha EF4500iSE in use

The Yamaha EF4500iSE

The Yamaha EF4500iSE's engine, 357 cc Yamaha MZ360 OHV 4-stroke, fueled by gasoline, can deliver 120V. It provides a running wattage of 4000W and reaches a peak wattage of 4500W.

At a noise rating of 58 dBA (less noisy than a refrigerator), the inverter generator offers the possibility to start the device via a convenient and easy-to-use electric starter (battery included). For additional convenience, the EF4500iSE may also be remotely started (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).

The EF4500iSE generates a clean sine wave: providing <3% Total Harmonic Disruption (THD), delicate electronics can be plugged in its AC outlets safely.

The following are examples of possible devices which the generator will allow you to power simultaneously:Note: All of these devices might not start simultaneously. Provided examples are based on a maximum load of 75 % and estimated wattages. With the help of our wattage calculator you can find out if this product suits your requirements.

Outlets

The control panel provides the upcoming 3 AC outlets:

Duplex 120V 20A (5-20R)
120V 30A (L5-30R) receptacle

Even though this Yamaha generator isn't quite RV Ready, its L5-30R receptacle allows an easy RV connection via an L5-30P to TT-30R adaptor.

Portability

Thanks to its closed inverter generator design (L30.7 x W24.3 x H27.8 in), the Yamaha EF4500iSE, is more esthetical than a typical, open frame generator. The featured design follows the latest trends and is ideal for easy and recreational use.

Even though this device may be technically portable (as in movable), manipulation and transportation without special equipment can be a challenge, as it weighs 194 pounds. However, its challenging mobility is solved by a wheel kit and a double handle, which will ease its displacement, once it is on the floor.

Features

Panel of the Yamaha EF4500iSE

The EF4500iSE's control panel

Monitoring of the EF4500iSE's status and activity is made possible by an illuminated data center, which provides information on the lifetime run hours and is one of the features of its control panel.

In addition to this info, when the generator is ready, the generator is on overload and its oil levels are insufficient, you will be informed by the featured light indicators.

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

Besides the features previously mentioned, accessory-wise, the Yamaha EF4500iSE comes with the usual documentation and user manual needed to get you promptly started.

Emissions

The Yamaha EF4500iSE 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, making it usable in forested areas.

Product Video

Video of the Yamaha EF4500iSE

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 is your top priority, one of the champions in this power category is the Energizer eZV4500, weighing just 78 pounds.
  • As its lowest possible noise is rated at 58 dBA, this inverter generator qualifies as one of the more quiet of the products of similar power. For those who are looking for a less noisy device, we suggest the Westinghouse iGen4500. With just 52 dBA, it is one of the most quiet devices in this power range.
  • Autonomy-wise, with 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 Westinghouse WGen3600DF, which is able to run for 18 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 inverter generator is not fuel efficient compared to devices of similar output: its estimated fuel consumption stands at 0.3 GPH at a 25% load. If you are concerned with gasoline efficiency, having a fuel consumption of just 0.14 GPH, the Westinghouse iGen4200 is a device you should look out for.

Price comparison

As you can see from this dynamic 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

STRENGTHS:
  • Remote start capable
  • Inverter
  • Quiet for its power (58 dBA)
WEAKNESSES:
  • On the expensive side
  • On the heavy side (194 lbs)
  • Relatively low run time
  • Low fuel efficiency

Do you own the Yamaha EF4500iSE and agree (or disagree) with these strengths and weaknesses?

Let us know and write your own review.

Where to buy the Yamaha EF4500iSE?

You can easily buy your Yamaha generator online. You will benefit from a convenient delivery and avoid carrying the heavy package yourself. Here are a few reliable online sellers:
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Price History
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Price history for the Yamaha EF4500iSE
Latest updates:
  • $2,875.55 - September 3, 2019
  • $3,059.10 - August 31, 2019
  • $2,875.55 - August 24, 2019
  • $2,906.15 - August 17, 2019
  • $2,789.99 - August 13, 2019
  • $2,706.29 - August 7, 2019
  • $2,789.99 - July 30, 2019
  • $2,754.99 - July 15, 2019
Since: May 14, 2019
  • Highest Price: $3,059.10 - August 31, 2019
  • Lowest Price: $2,594.69 - June 23, 2019

Features and Specifications

General

InverterYes
PortableYes
Parallel capableNo
RV readyNo
FuelGasoline
Engine357 cc Yamaha MZ360 OHV 4-stroke
Starting systemElectric, Remote

Power

VoltageAC: 120V 60 Hz
Running watts4000 W
Starting watts4500 W
Running amps33.3 amps
Peaks amps37.5 amps
Run time @50% loadN/A
Run time @25% load15.2 h

Features

GFCI outletsNo
Covered outletsNo
Automatic Voltage RegulationYes
AC outlets1x Duplex 120V 20A (5-20R)
1x 120V 30A (L5-30R)
DC outletsNo
Data centerLifetime run hours
IndicatorsLow oil, overload and output ready
Fuel tankPlastic, 4.5 gal
Fuel gaugeYes

Misc

Weight194 lbs
Dimensions (L x W x H)30.7 x 24.3 x 27.8 in
Noise (lower limit)58 dBA
THD< 3%
EmissionsCARB, EPA
SecurityLow oil and overload protection
Spark arrestorYes
NeutralFloating
Accessories includedNo
Warranty3 years

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 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. Alternatively, you can also contact their Customer Support: 1-800-962-7926.

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