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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 summary, the Yamaha EF6300iSDE 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
  • Food van owners who know that just a short power outage could lose them hundreds of dollars
  • Homeowners in need of an emergency backup power for their essentials
  • Camping and tailgating buffs looking to enhance their experience
  • Professionals who want to be able to deliver results, even during a power failure

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 EF6300iSDE in use

The Yamaha EF6300iSDE

The Yamaha EF6300iSDE houses a 357 cc Yamaha MZ360 OHV 4-stroke engine, which provides 120/240V, consumes gasoline and delivers a running wattage of 5500W along with a peak wattage of 6300W.

The inverter generator features a simple and elegant electric starter (battery included). It is rated for a noise of 58 dBA (less noisy than rainfall). For additional convenience, the EF6300iSDE may 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 EF6300iSDE may run for up to 13.3 hours with a full tank (fuel consumption around 0.34 GPH).

The EF6300iSDE generates a clean sine wave: providing <4% Total Harmonic Disruption (THD), delicate electronics can be plugged in its AC outlets safely.

Outlets

The control panel features the upcoming 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

As the Yamaha EF6300iSDE is an inverter generator, its encased design (L30.7 x W24.3 x H27.2 in) offers more aesthetics than a conventional, open frame product. The featured design follows the latest trends and is ideal for easy and recreational use.

Since the generator weighs 200 lbs, it will be incredibly difficult to manually lift it and transport it, even though it is technically considered to 'be portable' (in the sense that it is 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 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, when the generator is ready, the generator is on overload and the oil level is too low, you will be informed by the featured light indicators.

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 overload protection (circuit breaker) and an automatic low oil shut-off (Oil Watch system), 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.

Accessory-wise, along with the previously mentioned features, the Yamaha EF6300iSDE 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 EF6300iSDE is EPA approved, but NOT CARB-compliant. Thus, it cannot be purchased or sold in California.

However, it features a spark arrestor, which makes it suitable for use 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 weight is your top priority, one of the champions in this power category is the Westinghouse WGen5300v, weighing just 107 pounds.
  • With a lowest possible noise of 58 dBA, this inverter generator places itself amongst the more quiet of the products delivering similar power. If you’d prefer a less noisy device, one of the most quiet devices, which share the same power range with this one, is the Honda EU7000iS, whose lowest noise levels reach just 52 dBA.
  • 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. Furthermore, considering the run times, one of the generators which have a roughly same power output, with the highest autonomy, is the Westinghouse WGen5300s, as it provides up to 20 hours.
  • While the run time is an important parameter, it is dependent on the fuel tank’s capacity and thus, doesn’t say much on its own unless we consider fuel consumption as well. This inverter generator is rather wasteful, compared to other devices within the aforementioned output range, when it comes to gasoline consumption, as it reaches roughly 0.34 GPH at a 25% load. If you are concerned with gasoline efficiency, having a fuel consumption of just 0.24 GPH, the Westinghouse WGen5300v is a device you should look out for.
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)
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
  • Low fuel efficiency

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% loadN/A
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.

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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Yamaha EF6300iSDE
9 Total Score
1 review
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Price
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Value
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Quality
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Performance
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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.
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