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Yamaha EF2000iSv2 2000 Watt Inverter Generator
Yamaha EF2000iSv2 Generator
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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

EF2000iS Yamaha Generator Cover Yamaha Generator Oil Yamaha Deluxe Hour Meter Sidewinder Parallel Cable - ACC-0SS55-70-01
Price: $38.00
Price: $4.98
Price: $44.50
Price: $88.95
Twin Tech Cable II
Price: $119.95

Average Rating: 5 of 5 Total Reviews: 335 Write a review »

  0 of 0 people found the following review helpful:
Perfect addition to Airstream and Chevy June 21, 2017
Reviewer: Larry Marvel from Oroville, CA United States  
The entire experience was great. Placed the order, received a call from Yamaha confirming with an email and a UPS shipping number.
Showed up on time, started right up after the pre-start instructions were followed.
Great addition to my Airstream and Chevy that take me to places that keep me smiling. Thank you.

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  0 of 0 people found the following review helpful:
as advertised June 15, 2017
Reviewer: J from Newport, OR United States  
Ordered from National Supply because they are significantly less expensive than competitors.  The generator arrived within 2 days and was packaged extremely well.  Unboxed it, oiled it, gassed it, and the generator started on the 2nd pull.  Very happy with the purchase and the service.

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  0 of 0 people found the following review helpful:
Met expectations June 14, 2017
Reviewer: William Bingham from Richmond, KY United States  
Both with the order, best price, and once received operated beyond expectations, I am well pleased with generator.  I am looking forward to using it for portable Amateur Radio events such as Field Day.   Generator is well made and has started each time with one pull.  First time I started it took only two pulls.  I think this generator is superior to the Honda unit.

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  0 of 0 people found the following review helpful:
EF2000iSv2 June 1, 2017
Reviewer: Robert Ward from Bozeman, MT United States  
Great generator, best price, received product on time as promised

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  0 of 0 people found the following review helpful:
Yamaha EF2000iSv2 Inverter May 31, 2017
Reviewer: Medin K from Salt Lake City, UT United States  
Great product and lowest price with free shipping. Would highly recommend to anyone. Great customer service.

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