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Yamaha EF6300iSDE Spec Review

The Yamaha EF6300iSDE is a quiet portable inverter generator with a rated wattage of 5500 W and a starting wattage of 6300 W.

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Description

OUR MOST POWERFUL INVERTER EVER. The EF6300iSDE is the most powerful, most advanced Yamaha inverter generator ever. (source: Yamaha (opens in a new tab))

Zoom on the Yamaha EF6300iSDE

In a nutshell, the Yamaha EF6300iSDE is a quiet portable inverter generator mostly geared towards:

  • RV travellers who wish to upgrade their experience to another level
  • People occasionally participating in outdoor fairs, festivals or events
  • Food truck owners who do not wish to see their business interrupted under any circumstances
  • Homeowners in need of an emergency backup power for their essentials
  • Camping and tailgating hobbyists looking for a portable power source
  • Professionals who want to ensure that a power failure will not prevent them from working

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 EF6300iSDE in use

The Yamaha EF6300iSDE

The Yamaha EF6300iSDE's engine, 357 cc Yamaha MZ360 OHV 4-stroke, fueled by gasoline, can deliver 120/240V. It provides a running wattage of 5500W and reaches a peak wattage of 6300W.

Enjoying a noise rating of 58 dBA (less noisy than rainfall), this inverter generator gets running thanks to a convenient and easy-to-use electric starter (battery included). To add further convenience, the EF6300iSDE can 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 EF6300iSDE may run for up to 13.3 hours with a full tank (fuel consumption around 0.34 GPH).

Sensitive electronics can be safely plugged in the AC outlets, as the EF6300iSDE produces a clean sine wave, with a <4% Total Harmonic Disruption (THD).

Outlets

The control panel includes the following 4 AC outlets:

Duplex 120V 20A (5-20R) GFCI
120V 30A (L5-30R) receptacle
120/240V 30A (L14-30R) receptacle

This Yamaha generator isn't quite RV Ready, but it features an L5-30R receptacle, allowing a simple RV connection through an L5-30P to TT-30R adaptor. Besides, due to the featured twist-lock L14-30R receptacle, the EF6300iSDE is transfer switch ready: you may connect it to a breaker box to power your household during a power outage.

Portability

Since the Yamaha EF6300iSDE is an inverter generator, its closed design (L30.7 x W24.3 x H27.2 in) has an esthetical advantage over conventional, open frame devices. This modern design aims to provide an ideal power solution to recreational users.

Although this generator is technically considered 'portable' (in the sense that it can be moved), its 200 lbs make it incredibly difficult to manually lift and transport. 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 EF6300iSDE

The EF6300iSDE's control panel

One of the many EF6300iSDE's features is the data center, included in its control panel, which conveniently provides information on the lifetime run hours and thus, helps you monitor its activity and status.

In addition to this info, some light indicators allow you to instantly see if the generator is ready, its oil levels are insufficient and the generator is on overload.

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

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.

Along with the aforementioned features, from an accessory standpoint, the Yamaha EF6300iSDE's box includes the typical documentation and an owner's manual (opens in a new tab), which will help you start your generator promptly.

Emissions

The Yamaha EF6300iSDE is EPA approved, but NOT CARB-compliant. Thus, it cannot be purchased or sold in California.

However, it features a spark arrestor and therefore, can be used in forested areas.

Product Videos

The Yamaha EF6300iSDE versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Yamaha EF6300iSDE compare to generators of similar power (between 5000 and 6000 W).

  • Considering its dry weight of 200 pounds, the Yamaha EF6300iSDE is one of the heavier generators producing between 5000 and 6000 running watts. If you are concerned by weight, one of the champions in the above mentioned power range is the WEN GN6000, with a dry weight of just 119 pounds.
  • Since this inverter generator is rated for a lowest possible noise of 58 dBA, it can be considered as one of the more quiet of the products generating similar power. For those who are looking for a less noisy device, we suggest the Honda EU7000iS. With just 52 dBA, it is one of the most quiet devices in this power range.
  • Autonomy-wise, with up to 13.3 hours on a full tank at a 25% load, the EF6300iSDE 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 WGen5300s, which is able to run for up to 20 hours.
  • Autonomy holds its importance, however, it is largely dependent on the generator’s fuel capacity and so, it is nonsensible to discuss it without mentioning fuel efficiency as well. This inverter generator has an estimated fuel consumption of roughly 0.34 GPH (gallon per hour) at a 25% load, rendering it somewhat average compared to devices of a similar output. If you wish to acquire one of the most gasoline efficient products of this power range, the Westinghouse WGen5300v, with a fuel consumption of 0.24 GPH could be in your good books.
According to our stats, the following comparison is pretty popular: Yamaha EF6300iSDE vs Honda EU7000iS.

Price comparison

As you can see from this interactive chart, when compared to other 5000-6000W generators, the Yamaha EF6300iSDE is on the average side of the price range.

Therefore, this generator nicely fits in the expected budget for this kind of product.

The bottom line

STRENGTHS:
  • In the expected price range
  • GFCI Outlets
  • Remote start capable
  • Inverter
  • Quiet for its power (58 dBA)
AVERAGE SPECS:
  • Decent fuel efficiency
WEAKNESSES:
  • No recoil back-up
  • No parallel ports
  • Not CARB-compliant
  • On the heavy side (200 lbs)
  • Relatively low run time

Do you own the Yamaha EF6300iSDE 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: 120/240V 60 Hz
Running watts5500 W
Starting watts6300 W
Running amps (@120/240V)45.8/22.9 amps
Peaks amps (@120/240V)52.5/26.3 amps
Run time @50% loadUnknown
Run time @25% load13.3 h
Features
GFCI outletsYes
Covered outletsNo
Automatic Voltage RegulationInverter
AC outlets
  • 1x Duplex 120V 20A (5-20R) GFCI
  • 1x 120V 30A (L5-30R)
  • 1x 120/240V 30A (L14-30R)
DC outletsNo
Data centerLifetime run hours
IndicatorsLow oil, overload and output ready
Fuel tankPlastic, 4.5 gal
Fuel gaugeYes
Misc
Weight200 lbs
Approx. dimensions (L x W x H)30.7 x 24.3 x 27.2 in
Noise (lower limit)58 dBA
THD< 4%
EmissionsEPA
SecurityLow oil and overload protection
Spark arrestorYes
NeutralBonded to frame
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 EF6300iSDE 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 sizing calculator.
ItemRunning WattsStarting Watts
At homeSump pump (1/2 hp)10502150
Furnace fan (1/2 hp)8752350
Refrigerator (energy star)1921192
Electric range21002100
Security system180180
Total4397 W5872 W
For campingRadiant heater13001300
RV refrigerator180600
Hair dryer18001900
RV AC (11,000 BTU)10101600
Radio100100
Total4390 W4980 W
For workTable saw18004500
Grinder14002500
Electric fence (25 miles)250250
Bug zapper8080
Total3530 W6230 W

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1 Review
  1. 4.5
    Price
    60
    Value
    100
    Quality
    100
    Performance
    100

    I bought two of these generators ELEVEN years ago. I only run non ethanol premium in them. This gas is replaced every June. I keep full synthetic oil in the crankcase. I will run these generators at 30% load for one hour about once every three months. I clear the carbs of fuel before storing. These generators look, start, run and perform just like new. The ONLY issue I have had is that the onboard battery will not survive the 12 volt DC parasitic drain within a month. I have to remove both batteries from these generators and keep them on a battery tender.
    These two generators were a significant investment to make eleven years ago but I do not regret it to this day. Also, they are still holding at the same retail price I paid at that time.

    + PROS:
    • If properly maintained, this generator can have a long life and still run like new.
    - CONS:
    • Expensive, heavy, and will drain the battery.
    Helpful(2) Unhelpful(0)You have already voted this

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