YAMAHA EF2000iS Inverter Generator – Our Personal Review!

Yamaha EF2000iS 2000-watt inverter generator – One of the best portable generators to get your hands on!

For anybody looking for a generator that could power your home appliances like a fridge, oven, TV, and others, this very generator is going to be an amazing choice. Along with being extremely well-designed, it is capable of powering major appliances.

The generator has a suitcase style which makes it a compact generator and is lightweight as well. With fuel filled, it weighs around 46 lbs. and what’s even great is that it could be easily carried around. Moreover, when the oil in the Yamaha EF2000iS gets below a certain level, an oil warning system will be activated, shutting down the generator until oil is added.

With all these things about this generator, it has a very good rating in customer reviews as well. The majority of its users have an overwhelming response when they’re asked about their experience with this generator and we’re sure it’s like that because we ourselves are happy users here!

This article contains our complete review of this generator and after reading it, you’ll most probably be its next user for how amazing it is.

How Are Yamaha EF2000iSv2 and EF2000iS Different From Each Other?

V2 is the newer, better, improved, and advanced version of EF2000iS. It has better functionalities and enhanced working abilities.

The main difference between the new EF2000iSv2 and the old EF2000iSv is their ability to run at maximum loads for longer periods of time. The older version v1 could only run at a maximum output of 2000 watts for less than a minute before overloading. EF2000iS’s first version was therefore unable to guarantee proper operation of electric equipment of this type.

Key Features

Here are some key features of this generator before we get into details of its technical features.

  1. The maximum AC output is 2000 watts – 1,600 watts are the rated output (13.3 amps).
  2. Decompression is automatic, making it easy to start.
  3. Pulse width modulation provides super clean power.
  4. Optimizes engine efficiency by automatically adjusting engine speed.
  5. In the event of an overload, the device automatically prevents internal damage.
  6. The phase of auto-warming up.
  7. In the event of a low oil level, the engine automatically turns off.
  8. A foam air filter that can be washed.
  9. Can charge 12 Volt batteries in RVs, autos, and marines using the DC output.
  10. Powered by Yamaha’s MZ80, a 79cc, air-cooled (fan assist), OHV, 2-valve engine with a 4-stroke transmission.
  11. For safer portability, the gas cap has large fuel-filling holes with sealable vents.
  12. In order to prevent sparks from leaving the exhaust, a spark arrestor is installed.
  13. Noise is reduced and the vibration is isolated by rubber feet.


EF2000iS is one of our favorite generators by Yamaha and we’ve been its users for a long time now. Let’s get going to know about its amazing features.


Dimensions 19.3 inches x 11 inches x 17.9 inches
Weight 44 lbs.
Wattage 1600 Watts
Load Runtime 10.5 Hours
Sound Frequency Within 58 decibels
Fuel Tank Capacity 1.1 gal
Engine 79 CC
  • Camouflage Design
  • Manual Recoil Start
  • Pulse Width Modulation Technology
  • Access to the Power
  • Highly Powerful
  • Automatically Adjusts the Engine Speed
  • CDI Ignition System
  • Fuel Tank
  • Fuel Efficient Technologies
  • Oil Usage
  • Quiet Operation
  • Easy Access to Centralized Controls
  • CARB Compliant
  • Price & Warranty

Camouflage Design

Yamaha EFiS Inverter Generator features a cutting-edge camouflage design which is incredibly perfect for use in tight spaces or on the go and can easily fit in your car trunk, making it a great choice for outdoor events such as fishing trips and camping.
With its oversized handles resembling a suitcase, It is designed with a black casing and green accents which makes it perfect for use in hunting as well. And fantastically it is weighing just 46 lbs even when its tank is filled with fuel.

Manual Recoil Start

The Yamaha EFiS Inverter Generator is a reliable and easy-to-use power source for your home or business. This amazing generator also features a manual recoil start, so you can always get it started if the power goes out.

With its electric start, you can be up and running in no time the EF2000iS Inverter Generator starts only in the first two pulls which saves you from lots of effort.

Pulse Width Modulation Technology

Pulse width modulation is a widely used technique for controlling the power that is delivered to electrical devices. The EF2000iS Inverter generator is another leading product of Yamaha as the technology ‘pulse width modulation’ is embedded in it, which has an efficient means of controlling power delivery and can be used to achieve precise control of both voltage and current. In order to save your other electronic devices from getting damaged.

Pulse Width Modulation Technology

Access to the Power

Yamaha’s EFiS Inverter Generator has a unique feature that allows it to be used with a variety of different power sources. The EFiS is designed to give you the best possible performance.

When using the EF2000iS generator with a standard outlet, you’ll have access to up to 2200 watts of power. Even if lights go out in the middle of the night this generator is enough to run most small appliances and electronics even.

If you need more power, you can use the EFiS with a battery. This will give you up to 4000 watts of power, which is enough to run large appliances and electronics.

Highly Powerful

Yamaha EFiS Inverter Generator is one of the most powerful generators in its class. It is capable of delivering up to 7,500 watts of power, making it ideal for use in a wide range of applications. With an advanced inverter system, the generator is able to produce clean, stable power that is perfect for sensitive electronic equipment.

Thanks to its compact design, the generator is easy to transport and set up, making it an ideal choice for use in a variety of situations.

Automatically Adjusts the Engine Speed

Another fantastic feature of EFiS is that it automatically adjusts the engine speed in order to produce the required amount of power. This results in more efficient use of fuel, less noise, and fewer emissions.

CDI Ignition System

The Yamaha EFiS Inverter Generator is equipped with a CDI ignition system. This system is designed to provide reliable and consistent ignition timing, while also reducing emissions. The CDI system uses an ignition coil to generate a high-voltage spark that ignites the fuel-air mixture in the engine’s cylinders. This system is maintenance-free and does not require adjustment.

CDI Ignition System

Fuel Tank

The all-new Yamaha EF2000IS Inverter Generator is the latest innovation from Yamaha. This unit is designed to run on unleaded gasoline, making it a great choice for those who want a more environmentally friendly option. The EFIS Inverter Generator also has a larger fuel tank than previous models, making it ideal for extended use.

Fuel Efficient Technologies

As technology advances, so does the fuel efficiency of inverter generators. The Yamaha EFiS Inverter Generator is a great example of this, as it features technologies that make it up to 30% more fuel efficient than traditional generators.

The Yamaha EFiS Inverter Generator maintains fuel efficiency through a variety of key features. Its advanced inverter system regulates engine speed in accordance with power output, reducing fuel consumption. Additionally, its “smart throttle” function optimizes fuel usage by modifying engine speed based on load.

Oil Usage

As the name suggests, an inverter generator uses an inverter to convert DC power from the generator into AC power that can be used by your appliances. This is different from a traditional generator which uses a mechanical process to generate AC power. So, because of that inverter generator is much more efficient than a traditional generator, meaning that you’ll use less fuel overall.

Quiet Operation

Yamaha generators have long been known for their quality and durability. The new Yamaha EFiS Inverter Generator is no exception. This generator is designed for quiet operation, making it ideal for use in camping or RVing.

The EFiS Inverter Generator uses a special inverter system that makes it run much quieter than traditional generators.

Quiet Operation

Easy Access to Centralized Controls

The Yamaha EFiS Inverter Generator is designed with easy access to centralized controls in mind. The control panel is located in the front of the unit, making it easy to reach and operate. The panel includes a power switch, voltage selector switch, and circuit breaker. A voltmeter is also included on the control panel, allowing you to easily monitor the output voltage of the generator.

CARB Compliant

The Yamaha EFiS Inverter Generator is carb compliant, which means it meets the standards set by the California Air Resources Board. This makes it a great choice for those who live in California or any other state with stringent emission standards. The EFiS Inverter Generator uses an advanced fuel injection system that helps it meet these standards while still providing reliable power.

Price & Warranty

Yamaha’s EFiS Inverter Generator is one of the most popular and affordable inverter generators on the market. It’s a great choice for those who need a reliable power source for their RV or camping and fishing trips, as well as for those who need a backup power source for their home.

The EFiS price can vary depending on the retailer, but usually, Amazon offers the most affordable price this model in every case comes with a three-year limited warranty.

  • It has an original Yamaha engine.
  • Lightweight and compact design
  • Highly fuel efficient.
  • Automatic warm-up and decompression system
  • Unavailability of the gas drain. It must siphon out.
  • The unit must be tipped to drain the oil.


YAMAHA EF2000iS Inverter Generator – FAQs

How many watts is a Yamaha EF2000iS?
Yamaha EF2000iS has 1600 watts/13.3 amps. NFBs protect internal circuits from damage during an overload.
What is the difference between EF2200iS and EF2000iS?
Here are four simple steps for starting EF2000iS: Switch off the economy control switch (black). Turn the air vent knob on while holding the fuel tank cap firmly in place. To turn on the fuel cock, turn the knob to the on position. Switch on the engine now (red).
How strong is a 2000-watt generator?
With 2000 watts, it’s possible to power a deep freezer, a microwave, and some lights, plus a 500-watt deep freezer and an electric stove (using 1000 watts each).
Can you run a generator 24 hours a day?
Generators can run continuously as long as there is fuel to fuel them. Natural disasters and other emergencies, however, may make it difficult to obtain certain fuels on a continuous basis. So long as you have fuel available to run your generator, you can keep it running.



A good thing about inverter generators is that they’re generally much quieter than conventional portable generators. In a nutshell, Yamaha EF2000iSv2 is one of the quietest inverters we have found after researching dozens of them.

There is general praise for its engine among users. Engines manufactured by Yamaha are some of the strongest and most reliable on the market, and that is also true for the engine used in the EF2000iSv2. There are also plenty of other inverter generators with Yamaha-licensed engines on the market.

We hope we’ve been helpful to our readers through our review of this generator.

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