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Yamaha EF6300iSDE Spec Review

The Yamaha EF6300iSDE is a quiet 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 sporting competitions, open-air performances and outdoor festivals
  • Food van owners who know that just a short power outage could lose them hundreds of dollars
  • 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
  • Professionals in need of safely powering high-intensity work or lighting equipment

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

Power & Run Time

The Yamaha EF6300iSDE in use

The Yamaha EF6300iSDE

The Yamaha EF6300iSDE's design includes a gasoline-fueled 357 cc Yamaha MZ360 OHV 4-stroke engine. With a 120/240V output, it gives a running wattage of 5500W and also a peak wattage of 6300W.

The inverter generator is rated for a noise of 58 dBA (less noisy than a quiet suburb). Its starting mechanism is based on a simple and elegant electric starter (battery included). The EF6300iSDE 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.

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).

Delicate electronics can be plugged in an AC outlets safely, as the EF6300iSDE generates a clean sine wave, reaching a <4% Total Harmonic Disruption (THD).

Outlets

The control panel provides the upcoming 4 AC outlets:

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

While this Yamaha generator is not RV Ready, its L5-30R receptacle can be used for a simple RV connection with an L5-30P to TT-30R adaptor. Besides, because the EF6300iSDE is equipped with a twist-lock L14-30R receptacle, it is transfer switch ready: it can power your home during a power outage, as it can be easily connected to your breaker box to power your household.

Portability

Thanks to its closed inverter generator design (L30.7 x W24.3 x H27.2 in), the Yamaha EF6300iSDE, is more esthetical than a typical, open frame generator. This type of design is the most modern and convenient way to recreationally generate power.

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. However, its challenging mobility is solved by its set of 4 wheels and its double handle, which will ease its displacement, once it is on the floor.

Features

Panel of the Yamaha EF6300iSDE

The EF6300iSDE's control panel

Monitoring of the EF6300iSDE'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, the light indicators show you if the generator is ready, the oil level is too low and the generator is on overload.

The inverter generator includes a built-in fuel gauge, a quick, easy and convenient method of checking the device’s gas level.

Security-wise, this product benefits from an automatic low oil shut-off (Oil Watch system) and an overload protection (circuit breaker), which gives you a complete peace of mind when using it.

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 thus, may 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).

  • With its weight of 200 lbs, the Yamaha EF6300iSDE is one of the heavier generators in the 5000-6000 rated wattage category. 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.
  • 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 Honda EU7000iS, one of the least noisy generators similarly powerful as this one, rated for 52 dBA.
  • As far as autonomy is concerned, providing up to 13.3 hours of runtime with a full tank at a 25% load, the EF6300iSDE falls into the low end in comparison with other devices of a comparable power output. If concerned with autonomy, one of the products of a comparable power output, which offers the highest run time, is the Westinghouse WGen5300DFv, boasting with up to 20 hours.
  • Even though run times are undoubtedly important, they are dependent on the fuel capacity to a large extent. For a more wholesome picture, we must take into consideration the fuel consumption of the generator. This inverter generator reaches an estimated fuel consumption of 0.34 GPH (gallon per hour) at a 25% load, making it average, for the previously mentioned wattage range. If not satisfied with the afore-mentioned fuel consumption, you may wish to check out the Westinghouse WGen5300DFv. With a fuel consumption of as little as 0.24 GPH, it is one of the most efficient generators currently on the market.
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 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:
  • GFCI Outlets
  • Remote start capable
  • Inverter
  • Quiet for its power (58 dBA)
AVERAGE SPECS:
  • Decent fuel efficiency
WEAKNESSES:
  • On the expensive side
  • 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
Peak 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 homeElectric fry pan15001500
Microwave (1000 watts)15001500
Sump pump (1/2 hp)10502150
Refrigerator (energy star)1921192
LED TV150150
Total4392 W5492 W
For campingRV AC (11,000 BTU)10101600
RV refrigerator180600
Hair dryer18001900
Radiant heater13001300
Radio100100
Total4390 W4980 W
For workTable saw18004500
Grinder14002500
Electric fence (25 miles)250250
Bug zapper8080
Total3530 W6230 W

Couldn't find the right answer for you? Ask your own question.

Yamaha EF6300iSDE
9 Total Score
1 review
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Price
6
Value
10
Quality
10
Performance
10
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(4) Unhelpful(0)You have already voted this

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