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Yamaha EF4500iSE Spec Review

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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Picture 1 of the Yamaha EF4500iSE
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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 (opens in a new tab))

Zoom on the Yamaha EF4500iSE

In a nutshell, the Yamaha EF4500iSE is a quiet portable inverter generator mostly geared towards:

  • RV travellers who wish to upgrade their experience to another level
  • Occasional participants of outdoor events, competitions, concerts and 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

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 information.

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.

With a noise rating of 58 dBA (less noisy than a refrigerator), the inverter generator features a convenient and easy-to-use electric starter (battery included). Moreover, to offer you even more convenience, the EF4500iSE can 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.

With a fuel capacity of 4.5 gallons, the EF4500iSE may run for up to 15.2 hours with a full tank (fuel consumption around 0.3 GPH).

The EF4500iSE produces a clean sine wave: thanks to a <3% Total Harmonic Disruption (THD), your sensitive electronics can be safely plugged in the AC outlets.

Outlets

The control panel includes the following 3 AC outlets:

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

Portability

As the Yamaha EF4500iSE is an inverter generator, its encased design (L30.7 x W24.3 x H27.8 in) offers more aesthetics than a conventional, open frame product. The generator has a contemporary design, convenient for recreationally generating power.

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. Still, once it is on the ground, its wheel kit and its double handle can easily solve the issue of low mobility and allow for easy relocation of the device.

Features

Panel of the Yamaha EF4500iSE

The EF4500iSE's control panel

Monitoring of the EF4500iSE's status and activity is made possible by a digital 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 oil level is too low, the generator is ready and the generator is overloaded, you will be informed by the featured light indicators.

The inverter generator allows for a quick, easy and convenient assessment of its gas level, as it is equipped with a built-in fuel gauge.

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 owner's manual (opens in a new tab) needed to get you promptly started.

Emissions

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.

Product Videos

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).

  • With its weight of 194 lbs, the Yamaha EF4500iSE is one of the heavier generators in the 3500-4500 rated wattage category. In terms of weight, one of the champions in their power range is the WEN GN400i, standing at just 66.1 lbs.
  • At a lowest noise rating of 58 dBA, this inverter generator is one of the quieter devices of similar power. If noise emissions are one of your priorities, you may be interested in the Cummins Onan P4500i, one of the least noisy generators similarly powerful as this one, rated for 52 dBA.
  • As far as autonomy is concerned, providing up to 15.2 hours of runtime with a full tank at a 25% load, the EF4500iSE falls into the low end in comparison with other devices of a comparable 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.
  • Run times are important, yet thanks to their dependence on the fuel capacity, they should be judged along with the fuel consumption of the device. 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 wish to further improve in the area of fuel efficiency, the Westinghouse iGen4200, which boasts with a gas consumption of only 0.14 GPH, may be the right generator for you.

Price comparison

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

STRENGTHS:
  • Remote start capable
  • Inverter
  • Quiet for its power (58 dBA)
WEAKNESSES:
  • On the expensive side
  • No recoil back-up
  • No parallel ports
  • 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.

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% loadUnknown
Run time @25% load15.2 h
Features
GFCI outletsNo
Covered outletsNo
Automatic Voltage RegulationInverter
AC outlets
  • 1x 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
Approx. 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 includedBattery
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.

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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 (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 sizer.
ItemRunning WattsStarting Watts
At homeRefrigerator (energy star)1921192
Hair dryer18001900
Vacuum cleaner10751175
Radio100100
Cell phone charger2020
Total3187 W4187 W
For campingRadiant heater13001300
RV refrigerator180600
Electric grill16501650
Set of 5 LED light bulbs5555
Total3185 W3605 W
For workGrinder14002500
Demolition hammer12601260
Electric fence (25 miles)250250
Drain cleaner250250
Total3160 W4260 W
Is it made in China? (Asked November 10, 2020)

The EF4500 is made in Japan.

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