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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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Set an alert for the Yamaha EF4500iSE - Current lowest price: $2,899.00
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Price History
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Price history for the Yamaha EF4500iSE
Latest updates:
  • $2,899.00 - July 15, 2020
  • $2,800.00 - July 10, 2020
  • $3,295.00 - July 9, 2020
  • $3,500.00 - July 7, 2020
Data source: ebay.com
Since: July 7, 2020
  • Highest Price: $3,500.00 - July 7, 2020
  • Lowest Price: $2,800.00 - July 10, 2020

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

  • RV travellers looking for even more independence
  • People occasionally participating in outdoor fairs, festivals or events
  • 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 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 information.

Power & Run Time

The Yamaha EF4500iSE in use

The Yamaha EF4500iSE

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.

With a noise rating of 58 dBA (less noisy than a conversation at home), the inverter generator features 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.

The EF4500iSE can operate for up to 15.2 hours with a full tank (fuel consumption around 0.3 GPH), due to its fuel capacity of 4.5 gallons.

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

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.

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 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

To help you monitor the EF4500iSE'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, the device’s light indicators will display if the generator is on overload, its oil levels are insufficient and the generator is ready.

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.

As for its security measures, the device features an automatic low oil shut-off (Oil Watch system) and an overload protection (circuit breaker), letting you 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.

Accessory-wise, along with the previously mentioned features, the Yamaha EF4500iSE is packaged with the standard documentation and an owner's manual (opens in a new tab), helping you start the device right away.

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 and therefore, can 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).

  • At a dry weight of 194 pounds, the Yamaha EF4500iSE is one of the heavier devices which can produce between 3500 and 4500 running watts. 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 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.
  • Given that the EF4500iSE reaches an autonomy of up to 15.2 hours with a full tank and at 25% load, it is placed within the average autonomy range of similarly powerful generators. 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 up to 18 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. 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.

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)
AVERAGE SPECS:
  • Decent run time
WEAKNESSES:
  • On the expensive side
  • On the heavy side (194 lbs)
  • 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% loadN/A
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.

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 homeElectric fry pan15001500
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

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