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Yamaha EF2000iSv2 2000 Watt Inverter Generator
Yamaha EF2000iSv2 Generator
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  • EF2000 Camo Version
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Price: $989.10

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The Yamaha 2000 Watt EF2000iSv2 incorporates a completely new controller with advanced programming, allowing the EF2000iSv2 the ability to power a much wider range of applications. It weighs in at 44.1 pounds, making it easily portable. Among the quietest portable generators in its class, the EF2000iSv2 features Smart Throttle technology which allows greater fuel efficiency and noise reduction.


  • Fuel Petcock ‐ Prevents stale gas problems and gummed‐up carburetors.
  • Fuel Gauge ‐ Allows quick fuel level inspection without turning off the unit and removing the fuel cap.
  • Smart Throttle™ ‐ Varies engine speed based on load, improving fuel economy as well as reducing noise and engine wear.
  • Electrical Overload Breaker – Prevents generator damage, in case of overload.
  • Oil Watch Warning System ‐ Prevents engine damage caused by low oil, avoiding costly repairs and minimizing down time, adding customer confidence and peace‐of‐mind.
  • TwinTech™ – Hook up two EF2000iSv2 generators for up to 30 amps of maximum power (requires accessory TwinTech II or Sidewinder cable, available for purchase).


1. What's the difference between the older model EF2000is and the new EF2000isV2?

The redesigned EF2000is has a new controller board which will allow you to run the generator at the maximum AC Output for a longer period of time before overloading. The maximum AC output is 2000 watts. The older version of the EF2000(is) will only run for 20 seconds at maximum AC output before the overload circuit trips. The new EF2000isV2 will run for up to 13 minutes before the overload circuit trips. The major benefit will allow you to run more appliances that cycle like Air Conditioners, or refrigerators which require more power upon startup to run at the same time. Simply stated, you now have a true 2000 watt generator.

2. Can I parallel the new EF2000isV2 model with an older EF2000iS?

Yes, you can connect the different models together, however in parallel the V2 controller board will operate like the older model. Maximum AC output will not operate for up to 13 minutes.

Generator Applications
The New EF2000iSv2
Yamaha Versus the Competition - WHY YAMAHA?
Inverters vs. Generators - What's the Difference?
Choosing the right size Generator

Twin Tech Cable II Sidewinder Parallel Cable Yamaha Deluxe Hour Meter EF2000iS Yamaha Generator Cover
Price: $119.95
Price: $88.95
Price: $44.50
Price: $36.00
7DK-Y8579-10-00 ACC-0SS55-70-01 ENG-METER-4C-01 ACC-GNCVR-20-BK
Yamaha Generator Oil
Price: $4.98

Average Rating: 5 of 5 Total Reviews: 309 Write a review »

  0 of 0 people found the following review helpful:
Great generator February 15, 2017
Reviewer: Mark Creel from Cleveland, OH United States  
I purchased a 2000 watt generator and the unit arrived double boxed without an damage. I adddd the oil that was sent with the unit. Then added some gas and it started on the first pull. This website had a better price than anyone else and the customer service was wonderful. Cover fit great.

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  0 of 0 people found the following review helpful:
Great Service - Great Product - Amazing Experience January 27, 2017
Reviewer: NNelson from De Soto, KS United States  
I couldn't have asked for anything better!  Great product and the best price with amazing service.  Super easy to order, arrived as expected, everything is perfect!

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  1 of 1 people found the following review helpful:
Great Generator January 26, 2017
Reviewer: Tom Spooner from West Warwick, RI United States  
I have been looking at the EF2000 for a while now, and finally purchased it. I liked the output vs the weight.  The 2400 is nice but almost 2.5 the weight.  The generator is perfect, runs flawless and is quiet, I could go on and on, but it's a GREAT Generator.  Now the service from National Supply, 0 complaints.  Generator showed up in 3 days, brand new, double boxed, with packaging inside and strapping, bottle of oil, could not be happier with the deal.  If your hesitant and want this Gen, buy it now, at this price, from these guys.  I plan to use this on the boat for the water heater, AC, and microwave (and charging batteries), and at home overnight to run the blower on the gas furnace.  I do have a much larger generator to run the whole house, but at night, with this in the shed (and vented) you can't hear anything, so very nice.

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  0 of 1 people found the following review helpful:
Looks and seems fine. December 9, 2016
Reviewer: Daniel Jenkins from Auburn, GA United States  
I bought this without researching the new v2 model.
Time will tell. Does fine for now.

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  0 of 0 people found the following review helpful:
Great customer service and product! December 7, 2016
Reviewer: Jim Grace from Chimacum, WA United States  
We received our generator in 3 days!  I put oil and gas in it and it started right away.  I will definitely recommend this company to others.  Great customer service and reliable products.  Thank you again, Jim Grace of Washington State

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