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Yamaha EF3000iS 3000 Watt Inverter Generator
Yamaha EF3000iS
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Price: $1,799.00

   Current Availability: In Stock - Orders Received by 2PM PST Ship Same Day - SEE REDUCED PRICE IN SHOPPING CART

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The 3000 Watt EF3000iS weighs 136 pounds. Designed to be acoustically sound, this extremely quiet generator (53-60 dBA) features Smart Throttle which allows greater fuel efficiency and noise reduction. It will run up to 19 hours at ¼ rated load on a tank of gas. With features such as Built-In Wheels, Noise Block, and an Oil Watch Warning System, the EF3000iS is a powerful yet portable medium-range inverter!


  • Yamaha generators have the longest emission engine durability ratings issued by the Environmental Protection Agency and the California Air Resources Board.
  • Independent gasoline petcock helps reduce carburetor cleaning and repairs by eliminating stale gas in the carb.
  • The EF3000iS is equipped with advanced features and is extremely quiet yet smartly priced.
  • The EF3000iS includes Yamaha’s performance enhancing features, such as Inverter Technology, Smart Throttle, and Noise Block.
  • The EF3000iS is capable of producing clean, high-quality electricity with extremely quiet operation (53 dBA – 60 dBA).
  • This unit also features a fresh, ergonomic design with easy control access.
  • The EF3000iS features built-in wheels, so its remarkably portable - providing convenient power to the locations you need it most.
  • Yamaha’s Oil Watch Warning System helps prevent engine damage from low oil and provides added peace of mind.


  • Noise Block, acoustically designed sound reduction system ‐ Sound absorbing material, used in key locations, does not resonate sound. Newly designed muffler and molded fan produce unbeatable noise reduction at 53 - 60 dBA.
  • Independent gasoline petcock ‐ Helps reduce carburetor cleaning and repairs by eliminating stale gas in the carburetor.
  • Smart Throttle, load sensing rpm control ‐ Greater fuel efficiency and noise reduction by automatically adjusting engine speed to match the load.
  • Long run time ‐ Continuous operation for up to 18.6 hours without refueling (at 1/4 rated load with “Smart Throttle” function on).
  • 12 Volt DC output, battery charging cables included ‐ Recharge 12-volt batteries for RV, auto, marine, etc.
  • Inverter system with Pulse Width Modulation (PWM) control ‐ Can run products with built-in microcomputers, or microcomputer-controlled electric tools.
  • Centralized control panel ‐ Easy access to controls.
  • 171cc Overhead Valve (OHV) engine ‐ Noise-reducing operation with improved efficiency, increased reliability, and low oil consumption.
  • Oil Watch Warning system ‐ Prevents engine damage to avoid costly repairs and minimize down time adds customer confidence and peace of mind.
  • Four wheels with parking brake ‐ Easy transport and mobility.
  • EPA & CARB Emission Engine Life Rating ‐ Yamaha generators have the longest emission engine life ratings issued by the environmental.
  • Automatic decompression ‐ Greatly reduces starting effort.
  • Factory Warranty ‐ Covers the entire generator for defects in parts and workmanship for three (3) years.
Inverter or Generator? What is the difference?
Yamaha Versus the Competition - WHY YAMAHA?
How to choose the right size Generator.
Average Rating: 5 of 5 Total Reviews: 21 Write a review »

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  0 of 0 people found the following review helpful:
Great Product for the Price June 14, 2017
Reviewer: Joseph Fietek from Park River, ND United States  
I purchased this generator to run my camper and had done a lot of research.  It came down to this and the Honda.  For the price I cannot be more pleased.  The noise was minimal and I can have a conversation standing outside right by it.  It starts first or second pull every time and powered everything I needed.

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  0 of 0 people found the following review helpful:
cover December 11, 2016
Reviewer: Daniel Hunter from Williston, FL United States  
Fits good water tight

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  2 of 2 people found the following review helpful:
Exactly what I needed for my RV August 5, 2016
Reviewer: Michael Lee from Alpharetta, GA United States  
I compared the Yamaha 3000is to the Honda 3000EU. In my opinion the Yamaha is a much better generator for the money. A lot of people recommended the Honda to me including the Head Mechanic at the RV dealer. I compared the two generators but for the price and the features the Yamaha just is a better deal.
It is very heavy but well built the quality is amazing. I did not see one in a store near me. so I had to go by what I had read on the internet. National Supply was terrific to work with and their price was by far the lowest. I am running the generator right now to charge my batteries plus it runs my 13.5btu ac with no problems! The main reason I chose this size was so I could dry camp and have ac. I could not be more happy with my purchase and I highly recommend National Supply as a Yamaha Dealer!

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  0 of 0 people found the following review helpful:
Works great for our RV June 21, 2016
Reviewer: Kevin Martin from Belmont, NC United States  
Easy to purchase, quick delivery, out of the box and ready to go in just a few minutes. Works great and is very quiet. We wanted it so we could run our a/c  in the heat of the day at festivals and it does that easily. I really like the fuel cut off that is right there on the control panel.

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  0 of 0 people found the following review helpful:
Not So Quiet As Advertised Yamaha Generator May 31, 2016
Reviewer: Donna Waters from Markle, IN United States  
Our generator was bought for the specifics that it would be quiet, but other than the first run in our driveway and not hooked up to the camper, it is not very quiet.  Good thing is that the pull start is very easy and starts the first pull.

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