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Yamaha EF4500iSE - 4000/4500W Inverter Generator With Electric Start

The Yamaha EF4500iSE is a quiet inverter generator with a rated wattage of 4,000 W and a starting wattage of 4,500 W. (Read full specs)

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Yamaha EF4500iSEYamaha EF4500iSEYamaha EF4500iSE
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Price History
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Price history for the Yamaha EF4500iSE
Latest updates:
  • $3,999.00 - May 1, 2024
  • $3,798.91 - April 2, 2024
  • $3,999.00 - February 22, 2024
Data source: acmetools.com
Since: February 22, 2024
  • Highest Price: $3,999.00 - February 22, 2024
  • Lowest Price: $3,798.91 - April 2, 2024

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 short, the Yamaha EF4500iSE is a quiet portable inverter generator adequately designed for:

  • RV travellers wishing to enhance their freedom and nomad lifestyle
  • 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

In the sections ahead, the power characteristics, availability of various outlets, the portability, and any additional features of the device shall be discussed.

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 4,000W and reaches a peak wattage of 4,500W.

Rated for 58 dBA (less noisy than a conversation at home), the inverter generator's starting mechanism relies on a simple and elegant electric starter (battery included).

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.

The EF4500iSE's fuel tank, boasting 4.5 gallons, allows it to operate for up to 15.2 hours with a full tank (with an estimated fuel consumption of 0.3 GPH).

Sensitive electronics can be safely plugged in the AC outlets, as the EF4500iSE produces a clean sine wave, with a <3% Total Harmonic Distortion (THD).

Outlets

The control panel includes the following 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

The Yamaha EF4500iSE is an inverter generator and features an encased design with the following dimensions: L30.7 x W24.3 x H27.2 in. This design enhances aesthetics and helps minimize noise levels, distinguishing it from conventional, open frame products. The generator has a contemporary design, convenient for recreationally generating power.

Though weighing 209 lbs, the generator remains classified as 'portable,' indicating its capability to be moved, though its weight could pose transport challenges. Nonetheless, the limited maneuverability is compensated for by utilizing its set of 4 wheels and its double handle, which facilitates shifting once the generator is set on the ground.

Features

Panel of the Yamaha EF4500iSE

The EF4500iSE's control panel

Included in the control panel of the EF4500iSE, a digital data center assists in tracking its status and activity by providing details on the lifetime run hours and power output.

In addition to this info, the device’s light indicators will display if the generator is ready, the oil level is too low and the generator is overloaded.

The built-in fuel gauge of the inverter generator ensures simple and quick gas level assessments.

Regarding security, the generator comes with an overload protection (circuit breaker) and an automatic low oil shut-off (Oil Watch system), providing peace of mind during operation.

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.

Along with the aforementioned features, from an accessory standpoint, the Yamaha EF4500iSE's box includes the typical documentation and an owner's manual (opens in a new tab), which will help you start your generator promptly. An official storage cover is available, as a separate purchase.

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 inverter generators of similar power (between 3500 and 4500 W).

  • At a dry weight of 209 pounds, the Yamaha EF4500iSE is one of the heaviest inverters which can produce between 3500 and 4500 running watts. if you wish to prioritize weight, the Genmax GM4600iAEFIC is one of the top contenders in its power category, weighing only 58.4 pounds.
  • At just 58 dBA rated noise level, this inverter generator is positioned as one of the quieter choices among devices delivering similar type and power. If you wish to prioritize minimal noise, the Westinghouse iGen4500DF stands out as one of the quietest options among generators of similar power, with a rating of 52 dBA.
  • Regarding its autonomy, the EF4500iSE can run for up to 15.2 hours at a 25% load, aligning it with the lower performers in its type and power range. If runtime is a priority for you, the Firman W03661OF stands out as one of the generators with the longest run time in its power range, providing up to 25 hours of continuous use.
  • 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 doesn't excel in fuel efficiency when compared to others of its kind: it consumes approximately 0.3 GPH at a 25% load. To prioritize fuel savings, we advise considering the Champion 200988, which stands out for its gasoline efficiency, consuming just 0.16 gallons per hour.

Price comparison

As you can see from these interactive charts, when compared to other 3500-4500W inverter 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:
  • CO Sensor
  • Electric start
  • Inverter
  • Quiet for its power (58 dBA)
  • Made in Japan
WEAKNESSES:
  • On the expensive side
  • No recoil back-up
  • No remote start
  • No parallel ports
  • On the heavy side (209 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
Parallel capableNo
RV readyNo
FuelGasoline
Engine357 cc Yamaha MZ360 OHV 4-stroke
Starting systemElectric
Warranty3 years
Power
VoltageAC: 120V 60 Hz
Running watts4,000 W
Starting watts4,500 W
Running amps33.3 amps
Peak 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 centerPower output and lifetime run hours
IndicatorsLow oil, overload and output ready
Fuel tankPlastic, 4.5 gal
Fuel gaugeYes
Misc
Weight209 lbs
Approx. dimensions (L x W x H)30.7 x 24.3 x 27.2 in
Noise (lower limit)58 dBA
THD< 3%
ComplianceCARB, EPA
SecurityLow oil and overload protection, CO monitoring
Spark arrestorYes
NeutralFloating
Accessories includedBattery
Country of originJapan
Other model numbersEF45ISEZ
UPC765053833196

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, many of their 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 wattage calculator.
ItemRunning WattsStarting Watts
At homeAC (10,000 BTU)15002200
Microwave (1000 watts)15001500
Refrigerator (energy star)1921192
Total3192 W4192 W
For campingRV AC (11,000 BTU)10101600
RV refrigerator180600
Hair dryer18001900
Mixer200200
Total3190 W3780 W
For workGrinder14002500
Demolition hammer12601260
Drain cleaner250250
Electric fence (25 miles)250250
Total3160 W4260 W
Is it made in China? (Asked November 10, 2020)

The EF4500 is made in Japan.

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