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Yamaha EF3000iS Spec Review

The Yamaha EF3000iS is a quiet inverter generator with a rated wattage of 2800 W and a starting wattage of 3000 W.

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Description

QUIET, CLEAN POWER AT A VALUE PRICE. Quiet and portable, this inverter has powerful features all backed by a 3‑year warranty. (source: Yamaha (opens in a new tab))

Zoom on the Yamaha EF3000iS

In summary, the Yamaha EF3000iS is a quiet portable inverter generator especially useful for:

  • DIYers who wish to improve their efficiency with tools
  • Homeowners in need of an emergency backup power for their essentials
  • Tailgating and campground aficionados with the desire of enjoying power anywhere they go
  • RV travellers wishing to enhance their freedom and nomad lifestyle

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 EF3000iS in use

The Yamaha EF3000iS

The Yamaha EF3000iS's engine, 171 cc Yamaha MZ175 OHV 4-stroke, fueled by gasoline, can deliver 120V. It provides a running wattage of 2800W and reaches a peak wattage of 3000W.

With a noise rating of 53 dBA (just slightly more noisy than a refrigerator), the inverter generator features a simple traditional pull-start mechanism.

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 fuel capacity of 3.4 gallons allows the EF3000iS to operate for up to 18.6 hours with a full tank (fuel consumption around 0.18 GPH).

As the EF3000iS produces a clean sine wave, with a <3% Total Harmonic Disruption (THD), sensitive electronics may be plugged in the AC outlets safely.

Outlets

The control panel features the upcoming 3 AC outlets:

Duplex 120V 20A (5-20R)
120V 30A (L5-30R) receptacle

Additionally, it features 1 DC outlet: there's a 12V 12A receptacle with which you may charge your batteries with ease.

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

Since the Yamaha EF3000iS is an inverter generator, its closed design (L26.8 x W17.5 x H21.9 in) has an esthetical advantage over conventional, open frame devices. The design follows the contemporary trends and is perfect for recreationally generating power.

Although this generator is technically considered 'portable' (in the sense that it can be moved), its 136 lbs make it incredibly difficult to manually lift and transport. Nevertheless, thanks to its set of 4 wheels and its double handle (a decent solution to its lack of maneuverability), the generator can be easily moved, once placed the ground.

Features

Panel of the Yamaha EF3000iS

The EF3000iS's control panel

The light indicators show you if the generator is ready, its oil levels are insufficient and the generator is overloaded.

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

From a security standpoint, the product offers an automatic low oil shut-off (Oil Watch system) and an overload protection (circuit breaker), allowing you to 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.

Besides the usual set of documentation and owner's manual (opens in a new tab) to get you promptly started, Yamaha also included a battery charging cables in the EF3000iS's packaging. An official storage cover is also available, as a separate purchase.

Emissions

The Yamaha EF3000iS 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 Video

The Yamaha EF3000iS versus other generators

The following charts are provided to give you an idea of how some of the key specs of the Yamaha EF3000iS compare to generators of similar power (between 2500 and 3500 W).

  • At a dry weight of 136 pounds, the Yamaha EF3000iS is one of the heavier devices which can produce between 2500 and 3500 running watts. If weight is your top priority, one of the champions in this power category is the Generac GP3300i, weighing just 59.5 pounds.
  • At a lowest noise rating of 53 dBA, this inverter generator is one of the quieter devices of similar power. If noise emissions are important to you, one of the least noisy generators of this power range is the Honda EU3000iS with only 50 dBA.
  • Thanks to an impressive running time of up to 18.6 hours at 25% load, the EF3000iS benefits from a higher run time than many generators of a similar output. If you consider autonomy on a single full tank as one of the deciding factors, one of the generators in the same power range that offers the highest run time is the Champion 200954, with up to 22 hours.
  • The run time is important, but also hugely depends on the capacity of the fuel tank and doesn't mean much if we don't talk about fuel consumption as well. As this inverter generator uses an estimated 0.18 GPH (gallon per hour) at a 25% load, it finds itself in the average gasoline consumption range of similar products. If you wish to further improve in the area of fuel efficiency, the Energizer eZV3200P, which boasts with a gas consumption of only 0.13 GPH, may be the right generator for you.

Here's a list of the most popular specific comparisons:

Price comparison

As you can see from this interactive chart, when compared to other 2500-3500W generators, the Yamaha EF3000iS 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:
  • Inverter
  • Quiet for its power (53 dBA)
  • High run time
AVERAGE SPECS:
  • Decent fuel efficiency
WEAKNESSES:
  • On the expensive side
  • No data center
  • No electric start
  • No parallel ports
  • On the heavy side (136 lbs)

Do you own the Yamaha EF3000iS 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
Engine171 cc Yamaha MZ175 OHV 4-stroke
Starting systemRecoil
Power
VoltageAC: 120V 60 Hz, DC: 12V
Running watts2800 W
Starting watts3000 W
Running amps23.3 amps
Peaks amps25 amps
Run time @50% loadUnknown
Run time @25% load18.6 h
Features
GFCI outletsNo
Covered outletsNo
Automatic Voltage RegulationInverter
AC outlets
  • 1x Duplex 120V 20A (5-20R)
  • 1x 120V 30A (L5-30R)
DC outlets1x 12V 12A receptacle
Data centerNo
IndicatorsLow oil, overload and output ready
Fuel tankMetal, 3.4 gal
Fuel gaugeYes
Misc
Weight136 lbs
Approx. dimensions (L x W x H)26.8 x 17.5 x 21.9 in
Noise (lower limit)53 dBA
THD< 3%
EmissionsCARB, EPA
SecurityLow oil and overload protection
Spark arrestorYes
NeutralFloating
Accessories includedBattery charging cables
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 EF3000iS 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 homeMicrowave (1000 watts)15001500
Refrigerator (energy star)1921192
Slow cooker270270
Cell phone charger2020
Total1982 W2982 W
For campingRV AC (11,000 BTU)10101600
RV refrigerator180600
Toaster oven800800
Mixer200200
Pair of small speakers4545
Total2235 W2825 W
For workGrinder14002500
Electric fence (25 miles)250250
Bug zapper8080
Total1730 W2830 W

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