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Yamaha EF2000iS

Image of the Yamaha EF2000iS inverter generator

The Yamaha EF2000iS is one of the best portable inverter generators out there. And infact we recommend this to be the best.  Reviewers share the same sentiments with us. It’s maximum power output is 2000 Watt.  With a compact size and a weight of 44lbs, the genset can be carried along easily wherever you need.

It really produces clean power which is equivalent to your house mains output. At 1/4 rated load this generator produces an incredible 51.5 db noise levels. This means you can have a conversation around one without realizing that it is even running. It is very fuel efficient. All these benefits make it ideal for camping, boating, fishing and tailgating.


  • Very quiet
  • Fuel gage installed
  • Fuel efficient
  • Clean power
  • Well built
  • Fuel cutoff switch
  • 3 year warranty

  • It ships with no oil
  • Oil level checking is inconvenient
  • Oil changing is daunting

At 1600 Watts rated power this generator can power most of your essential and common appliances in the household.Theses are Refrigerator, Microwave Oven, Lights, Portable fan, TV/DVD, Hair Dryer, Computer, Coffee Maker,Blender. Some reviewers it can  power a 6200 BTU air conditioner. You always have to know the power requirements of the appliances that needs to be powered compared to the output power of the generator. This is to make sure you don’t overload the generator. For an RV of 15k A/C, one 2000 watt cannot power it. You need to hookup two together.


It is a well-engineered and built genset. The engine has steel camshaft and valve train components, cast iron cylinder lining.  All this is to ensure that efficiency, reliability and the durability of the generator. Some customers complain about the inability to add an auxiliary tank for an extended run time. This they say can disturb your sleep pattern in the night when you need a refill. The oil Watch Warning System prevents engine damage caused by low oi land provides peace of mind. To prevent damage caused by overload, this generator is provided with electrical overload breaker.


Due to the Smart Throttle technology which varies engine speed based on load, this generator is very good on fuel economy. At 1/4 rated load and with a full tank you are suppose to get 10.5 hours of continuous operation. Auto decompression is a nice feature of this generator that reduces compression for easier starting of the machine. A lot of reviewers confirm this that, the engine starts by not more that two pulls and it is very easy to pull too. Controls are centralized for easier access too. Portability is a big advantage for this generator, as it comes with comfortable grip handle. It is also light weight and very compactly built.


Inverters as generally quiet machines and this no different. It is installed with a super-quiet muffler with USFS-approved spark arrestor. It produces only 51.5dbA at 1/4 and eliminates errant sparks.


This generator is certainly not the most powerful inverter generator but it is ideal for all the essential electrical equipment in your household. Besides it comes with the cleanest power and better fuel economy you can think off. It is light and compact for easy transportation. It is very durable and reliable. At it’s current price, the generator is not cheap but we promised you that, it is the best generator in it’s class money can buy. Click here to see pricing, ratings and reviews on

Yamaha EF2000iS
TypeOHV, air - cooled, single cylinder, 4 - stroke
Starting SystemRecoil Start
Low Oil Alert/ShutdownYes
Idle ControlYes
Hour MeterNo
CARB CompliantYes
Cast Iron SleeveYes
Rated / Maximum AC Output1600 / 2000 Watts
Rated / Maximum AC Current13.3 /16.7 Amps @120 V Single Phase
Voltage120 Single-Phase
DC Output8 Amps @ 12V
Auto Voltage Regulation (AVR)Yes
Voltage MeterNo
Tank Size1.1 Gallons
Continuous Operation at 1/4 Rated Load10.5 hrs
Tank MaterialPlastic
Portability KitN/A
Noise Level54.1-61 db(A)
Lifting EyeNo
Weight44 lbs (19.96 kg)
Dimensions19.3" L x 11" W x 17.9 " H (49.02 x 27.94 x 45.47cm)
Consumer3 Years
Commercial3 Years
AccessoriesDescriptionWhere To Buy
Image of STA-BIL 22214 Fuel StabilizerSTA-BIL 22214 Fuel Stabilizer. Want to prolong your engine's life? STA-BIL is the right choice. It keeps fuel fresh for quick, easy starts after storage, while prolonging your engine's life.Click Here
Yamaha's Engine Meters help you keep track of your engine's operating hours. The Deluxe Engine Meters include pre-programmed service intervals at 10 hours (initial) and every 50 hours thereafter. A flash alert displays for a 2-hour period upon reaching the specified interval. Includes hour meter and tachometer functions. Operating temperature: -40°F-160°F; -40°C-71°C. Battery life is 7-10 years (non-serviceable).Click Here
Image of No-Spill 1450 5-Gallon Poly Gas CanNo-Spill 1450 5-Gallon Poly Gas Can (CARB Compliant). Your best friend when filling your generator. Enjoy precise pouring of gas into your generator.Click Here
Gives quick, accurate readout of watts or amps used by 120 volt AC electrical devices (1875 Watts Maximum) such as: refrigerators, dehumidifiers, space heaters, holiday lighting, coffee makers, hair dryers and much more. Has a 26” cord to reach remote electrical outlets. Easy amps/watts slide switch. This tester is also perfect for matching appliance loads to generator power output.Click Here
These Parallel Power Cables are the fast, safe, and easy way to combine the power of two Yamaha EF2000iS Inverter generators. Cable features include polarized IP30 banana plugs, quick connection to parallel jacks on both generators, color-coded wire leads, exclusive flexible tip construction that resists breakage, compatibility with a standard 30A RV cord, rugged over-braided cable design, and a handy Velcro® mounting system.Click Here
Connect two EF2000iS generators in-line wtih a Twin Tech cable and output for Max 30AMPs and Rated 25 AMPs of power.Click Here
Protect your investment during storage with a cover made from premium SurLast™ polyester fabric. This UV-resistant material fights fading while protecting your equipment from the elements. A special urethane coating lets moisture escape from underneath while remaining water repellent. The cover is mold and mildew resistant, as well as tear and abrasion resistant for durability.Click Here

These are some of the general tips you need consider when you buy this genset;

  •  Get a fuel stabilizer
  •  Periodically start the machine if it is going to be unused for a very long time
  • Tie units down when in transport
  •  Limitations of the genset; what it can and cannot run.
  •  To deter thieves, buy a cable lock
  • Always test your newly bought generator out before there is an emergency or the actual time of using. In that you will be  sure the machine works. If anything than that you can replace it before the warranty expires.



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