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Yamaha EF6300iSDE - 5500/6300W Inverter Generator With Electric Start

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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

To sum up, the Yamaha EF6300iSDE is a quiet portable inverter generator tailored for:

  • RV travellers wishing to enhance their freedom and nomad lifestyle
  • Occasional participants of outdoor events, competitions, concerts and festivals
  • Food truck owners who want to ensure that their business is fully self-contained and does not rely on potentially unreliable external power
  • 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

The following sections will present you in detail its power characteristics, the different outlets it offers, its overall portability, and the extra features it benefits from.

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 5,500W and also a peak wattage of 6,300W.

With a noise rating of 58 dBA (less noisy than a refrigerator), the inverter generator features a straightforward and intuitive 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.

Featuring a 4.5 gallons fuel tank, the EF6300iSDE can provide power for up to 13.3 hours on a full tank (with fuel consumption averaging 0.34 gallons per hour).

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

Outlets

The control panel is equipped with 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 features an L5-30R receptacle, enabling an easy RV connection via an L5-30P to TT-30R adaptor. However, it is still not quite RV ready. Besides, equipped with a twist-lock L14-30R receptacle, the EF6300iSDE is engineered to be transfer switch ready, enabling simple hookup to your breaker box to provide backup power for your home during blackouts.

Portability

With its enclosed inverter generator design (L30.7 x W24.3 x H27.2 in), the Yamaha EF6300iSDE offers superior aesthetics and operates with minimized noise levels, distinguishing itself from standard, open frame generators. The design follows the contemporary trends and is perfect for recreationally generating power.

Despite its weight of 216 lbs, the generator is still considered 'portable,' meaning it is movable, although its heftiness may restrict portability in certain environments or require additional considerations for transportation and setup. 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 EF6300iSDE

The EF6300iSDE's control panel

Featuring a digital data center on its control panel, the EF6300iSDE offers you convenient access to essential information about the lifetime run hours and power output, facilitating effective monitoring of its activity and status.

In addition to this info, light indicators on the device will notify you if its oil levels are insufficient, the generator is ready and the generator is overloaded.

Benefiting from its built-in fuel gauge, the inverter generator allows for easy and immediate gas level inspections.

As far as security is concerned, the generator comes with an automatic low oil shut-off (Oil Watch system) and an overload protection (circuit breaker), providing peace of mind during use.

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.

Regarding its accessories, besides the aforementioned features, the Yamaha EF6300iSDE's box includes the typical documentation and an owner's manual (opens in a new tab), letting you start it right off the bat. An official storage cover is available, as a separate purchase.

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 inverter generators of similar power (between 5000 and 6000 W).

  • With its weight of 216 lbs, the Yamaha EF6300iSDE is one of the heavier inverter generators in the 5000-6000 rated wattage category. If weight is your top priority, one of the champions in this power category is the Champion 201238, weighing just 101.4 pounds.
  • This inverter generator offers a rated noise level of 58 dBA, placing it among the quieter alternatives in its type and power category. If noise emissions are important to you, one of the least noisy generators of this power range is the Honda EU7000iS with only 52 dBA.
  • The EF6300iSDE, offering a run time of up to 13.3 hours with a full tank at a 25% load, falls within the average autonomy range when compared to its peers. Furthermore, considering the run times, one of the generators which have a roughly same power output, with the highest autonomy, is the Honda EU7000iS, as it provides up to 16 hours.
  • Run time is a key metric, but it's dependent on the generator's fuel capacity. Therefore, discussing fuel efficiency is necessary to get the full picture. This inverter generator is not fuel-efficient compared to devices of similar output: its estimated fuel consumption stands at 0.34 GPH at a 25% load. If you're placing a high priority on fuel consumption, the DuroMax XP7000iH, with a low fuel consumption rate of 0.19 GPH, could be an option to consider.
According to our stats, the following comparison is pretty popular: Yamaha EF6300iSDE vs Honda EU7000iS.

Price comparison

As you can see from these interactive charts, when compared to other 5000-6000W inverter 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:
  • CO Sensor
  • GFCI Outlets
  • Electric start
  • Inverter
  • Quiet for its power (58 dBA)
  • Made in Japan
AVERAGE SPECS:
  • Decent run time
WEAKNESSES:
  • On the expensive side
  • No recoil back-up
  • No remote start
  • No parallel ports
  • On the heavy side (216 lbs)
  • 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
Parallel capableNo
RV readyNo
FuelGasoline
Engine357 cc Yamaha MZ360 OHV 4-stroke
Starting systemElectric
Warranty3 years
Power
VoltageAC: 120/240V 60 Hz
Running watts5,500 W
Starting watts6,300 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 centerPower output and lifetime run hours
IndicatorsLow oil, overload and output ready
Fuel tankPlastic, 4.5 gal
Fuel gaugeYes
Misc
Weight216 lbs
Approx. dimensions (L x W x H)30.7 x 24.3 x 27.2 in
Noise (lower limit)58 dBA
THD< 4%
ComplianceCARB, EPA
SecurityLow oil and overload protection, CO monitoring
Spark arrestorYes
NeutralBonded to frame
Accessories includedBattery
Country of originJapan
Other model numbersEF63ISDEX
UPC765053849371

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 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 size calculator.
ItemRunning WattsStarting Watts
At homeAC (10,000 BTU)15002200
Microwave (1000 watts)15001500
Sump pump (1/2 hp)10502150
Refrigerator (energy star)1921192
Laptop150150
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

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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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User Reviews

  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(8) Unhelpful(0)You have already voted this

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