Updated: December 22, 2020

Yamaha EF2000iSv2 Gas Powered Portable Inverter Review

by Charles Jasper

Product Overview

With its introduction of the Yamaha EF2000iSv2 Gas Powered Portable Inverter, Yamaha brings out the best combination of features a generator could offer. You won’t need to sacrifice, size, weight, or efficiency with this inverter generator.

The newest model in the Yamaha lineup includes a new controller that provides greater efficiency and versatility to meet the need for whatever job you give it. It consistently delivers energy that it clean to keep your sensitive electronics protected and its run-time can't be beaten.

Take the Yamaha EF2000iSv2 with you camping to keep your packing list light but your devices fully charged or take it with you to work to keep power a convenient and versatile power source at the tip of your fingers. The Yamaha EF2000iSv2 can do it all. It’s one of the best portable generators on the market today.

Yamaha EF2000iSv2 Gas Powered Portable Inverter

Yamaha EF2000iSv2 Gas Powered Portable Inverter
  • 1600 Running Watts
  • 2000 Starting Watts
  • 51.5 dBA at 1/4 load
  • 13.3/16.7 amps @ 120V
  • 44.1 pounds weight

Best Uses

The Yamaha EF2000iSv2 is the perfect generator to meet a wide range of needs:

  • Hunting – keep warm and power tools without disturbing wildlife
  • Camping – charge electronics and run appliances without upsetting neighbors
  • Outdoor work – enjoy the convenience of electric tools without the hassle of extension cords

Take It Hunting

Quiet & Safe

Be sure to pack the Yamaha EF2000iSv2 on your next hunting trip. It will provide the power you need without spooking the deer or disturbing the turkeys. At just 51-60 decibels of sound output, this quiet generator won't get in the way of finding peaceful quiet out in the woods.

This model comes with Yamaha’s newest muffler to ensure nothing disturbs the sounds of the forest. Even better, the Yamaha EF2000iSv2 comes with a spark arrestor that’s been approved by the US Forest Service, so you can rest assured that it's safe to use in your favorite spot.

Powerful & Versatile

When you climb up into your tree stand or settle into your blind, you want to be able to focus entirely on the sounds of nature. You keep your ears out for the slightest rustle while hoping your eyes will spot a deer and not another squirrel. You stay patient, but hunting season is cold and the wait is long. To have any hope of catching your prey, you must remain still even through your shivers.

That’s when the Yamaha EF2000iSv2 really shines. It can easily power a space heater for more than 10 hours to keep you warm while you wait. Since it’s so lightweight, you won’t even notice it packed in with your other supplies, and it’s small enough to easily fit in with your other gear.

When it’s time to celebrate your prize, be sure to have the Yamaha EF2000iSv2 handy. It will happily power any tools you may need while keeping the cold at bay. It has two 120V AC outlets, so you won’t need to worry about turning off your heater to get your tools running. The Yamaha EF2000iSv2 even has a DC outlet to charge your batteries.

The Best Camping Companion

The Yamaha EF2000iSv2 is one of the best camping generators available. It’s the perfect balance of power and portability while ensuring that it generates electricity that is safe for all your devices. When you want to make camping comfortable, choose the Yamaha EF2000iSv2.

Small & Discrete

As you load up your camper, cooler, and hiking gear, don’t forget to toss in the Yamaha EF2000iSv2. It’s just what you need to keep safe and comfortable while enjoying time away from the city. You don’t need a ton of extra space, though. The Yamaha EF2000iSv2 is smaller than 2.2 cubic feet, so you’ll still have plenty of room for your guitar, games, and favorite chair.

To limit vibrations, the Yamaha EF2000iSv2 has rubberized feet in addition to a state-of-the-art muffler and the most modern inverter technology. Together, these features ensure that this generator won’t disturb your neighbors, no matter what size campground you visit.

Of course, this also means that the Yamaha EF2000iSv2 meets the noise level requirements of the United States National Park Service, so you can take it with you as you travel through all of the national parks.

Clean & Strong

If you’ve ever dreamt of visiting our national parks, be sure to bring along the Yamaha EF2000iSv2. Very few of the parks offer electrical hookups, even for RVs. Being forced to find that connection limits your choice of campsites and in some cases can eliminate entire parks.

Instead of eliminating your choices, eliminate your worry by traveling with the Yamaha EF2000iSv2. It weighs less than 45 pounds, so it won’t break your axel, but it provides 1600 watts of power to keep your appliances running. Even better, that is 1600 watts of clean electricity.

In fact, the Yamaha EF2000iSv2 includes Pulse Width Modulation to ensure that the voltage never varies by more than 1%. Combine that with frequency stability of +0.1HZ and the result is electricity that is just as clean as what you get when plugging things in at home. This means you can bring your laptop, tablet, cell phone, and favorite handheld game along with your Yamaha EF2000iSv2 with the confidence of knowing that they’ll stay safely charged.

Yamaha generators have the best emissions ratings given by both the Environmental Protection Agency and the California Air Resources Board, so you know you’re respecting the environment when you choose the Yamaha EF2000iSv2. It’s the best inverter generator for reliable and clean power.

Work Around the Yard or Job Site

Keeping up with extension cords is a pain, and tripping over them is even worse. Skip that trauma and bring along the Yamaha EF2000iSv2.

Better than Batteries

Battery-powered tools look pretty in commercials, but once you get them home the challenges arise. Whether it’s looking for the correct battery to fit the tool, trying to determine if the battery is charged, or dealing with a dud in the middle of a job, battery-powered tools are more trouble than their worth.

Stick with the consistent reliability of electric tools and use the Yamaha EF2000iSv2 to power them with consistency and convenience. The sleek design of this inverter generator makes it easy to carry with you, whether it’s across the yard or across the farm.

The Yamaha EF2000iSv2 is perfect for a construction site too. Just fill the 1.1-gallon tank with unleaded gasoline, and you can keep your tools working for up to 10.5 hours. You’ll never have to worry about a battery dying in the middle of the job again. The Yamaha’s easy-to-read fuel gauge even makes it easy to monitor your fuel usage. Though with this kind of efficiency, you’ll be able to work all day without worry.

Best Features

  • Fuel Gauge – Yamaha included a fuel gauge that ensures you’ll never again have to guess how much fuel you have left.
  • Gasoline petcock – Should you ever need to store your Yamaha EF2000iSv2, this valve makes it easy to run it dry, so you never have to worry about stale gasoline again.
  • Oil Watch Warning – With just a glance you’ll know that your oil level is good and your engine will keep on running.
  • Auto warm-up – Yamaha designed an engine that will run faster when it is started cold so that it's ready to power any appliance right away.
  • A new controller – makes it easy to program the power to meet any of a wide range of power needs.

Easy Upkeep

The Yamaha EF2000iSv2 makes maintaining your inverter generator easy. You never have to wonder or worry about oil levels, and preparing it for storage is simplified, too. With the Yamaha EF2000iSv2, anyone can keep it running smoothly.


If you are looking for a generator that makes it easy to ensure the oil is kept at an appropriate level, look no further than the Yamaha EF2000iSv2. This inverter generator helps to prevent unnecessary damage to the engine that can happen when oil levels are allowed to drop too low. It has a special Oil Watch Warning. This system will ensure that your Yamaha EF2000iSv2 inverter generator is always running smoothly and you never have to pay for expensive repairs.


Should you ever need to store your Yamaha EF2000iSv2, you can rest assured that Yamaha makes it as easy as possible. In addition to the fuel gauge that ensures you always know how much gas remains, Yamaha also includes a gasoline petcock on this model. Just close that handy little valve and you can stop the gasoline from flowing into the carburetor and engine. This makes it easy to run dry in preparation for safe storage.


The Yamaha EF2000iSv2 inverter generator is built with a steel camshaft to ensure a long life. Its valve train components are also made of steel and the cylinder liner is cast iron. This combination ensures that you have an engine that will remain efficient and reliable for a very long time.

Easy to Use

The Yamaha EF2000iSv2 is an inverter generator that anyone can use. Yamaha added an auto-decompression system that makes it easy to start. You won’t need to be Popeye to pull this generator into action.

There is a smart throttle included with this Yamaha model that changes the speed of the engine as the load changes. When your appliances need more energy, the Yamaha EF2000iSv2 engine will throttle up to meet demand. When demand drops, this inverter generator’s smart throttle will focus on efficiency so that you’ll never waste a drop of gasoline.

In addition to easy operation, Yamaha makes it easy to plug into the Yamaha EF2000iSv2 by including two 120V outlets along with a 12V outlet for easy DC connection.


  • Lightweight - The Yamaha EF2000iSv2 generator weighs less than 45 lbs
  • Versatile – The Yamaha EF2000iSv2 can easily be set up to run in parallel for bigger jobs
  • Portable – This generator has a carry handle that makes it easy to bring along on any adventure
  • Quiet – Yamaha included an amazing muffler and rubber feet to ensure that the Yamaha EF2000iSv2 stays very quiet
  • Fuel-efficient – With just 1.1 gallons of gas in the tank, the Yamaha EF2000iSv2 inverter generator will keep on running for up to 10 and a half hours.
  • Clean – The Yamaha EF2000iSv2 includes a Pulse Width Modulation system to ensure that the energy it produces is in the form of a clean sine wave.


  • Power – this generator is great for portable use but using it to power a whole house will require multiple generators set up in parallel.


There is no better generator for hunters, campers, and those who have chores that take them away from an outlet then the Yamaha EF2000iSv2. It is a compact, hand-held generator with enough power to meet your needs. It’s also quiet enough to be used in any of our national parks and includes a spark arrestor to ensure safety in the forest.

The Yamaha EF2000iSv2 Gas Powered Portable Inverter, is designed to provide only the purest sine waves. This will ensure that all of your favorite electronics continue to operate. You don’t have to worry about their safety with this generator. It meets the highest standards of both the Environmental Protection Agency and the California Air Resources Board.

This is the perfect generator for everyday use throughout the year. It will power your tools through spring and summer chores that may not be within easy reach of an outlet. Fall camping will be much more comfortable with electricity generated by the Yamaha EF2000iSv2, and hunting through the winter won’t leave you frozen when you plug a space heater into this portable generator.

If you are looking for easy maintenance, reliable performance, and great fuel efficiency, the Yamaha EF2000iSv2 is the best inverter generator choice. It has easy controls and a fuel gauge that you can read at with just a glance. It is even built to run smoothly after a cold start. It will give you the portable power you need while without sacrificing ease-of-use or requiring challenging maintenance.

About the author

Charles Jasper is the owner and main author of Generator Guider. He has a degree Engineering and 20 years experience on using generators on various projects, around the house, and while traveling and camping. He has a passion for everything related to home improvemen and loves to travel on his RV. When he is not working, you might find Jasper working on projects around the house or organizing a camping trip.