The Best Yamaha Inverter Generator Review

Explore Yamaha inverter generator EF2000iS with pictures and a video. Yamaha EF2000iS expert and user reviews with features, pros and cons.

Features and specifications

Yamaha inverter generator EF2000iS is the gas powered generator that is coming from the consumer line of Yamaha generators, designed to produce electricity for home use and light duty commercial applications. The EF2000iS recharges 12 V batteries through the DC outlet, making it perfect for RV mobile homes, cars and boats also.

Lightweight and compact design

Yamaha EF2000iSYamaha EF2000iS

This portable inverter generator is a small and lightweight device that is built to power electrical devices sensitive to the voltage spikes, AC and home appliances, as long as the total Amps are below 16.7.

Yamaha EF2000iS is the true representative of portable generators; with its 44 pounds in weight and ergonomic handle on the top of the unit, it can be easily moved from place to place and stored when not using.

EF2000iS model is small, but powerful and efficient. It produces up to 2,000 watts of clean and reliable AC power. Tank capacity of 1.1 gal. allows EF2000iS to run up to 10.5 hours continuously in Economy mode, without refueling.

Better fuel efficiency

Single cylinder, 4-stroke OHV engine with 79cc provides a reliable work and with the Smart Throttle Load feature the engine speed is adjusted based on the load. These feature automatically help in better fuel efficiency while protecting the engine from damage. In extreme cases, there is an electrical overload breaker to save the engine from the excessive load.

Easy start up

Auto-decompression system reduces the compression for the easy start up, and dual coil alternator stator lowers the engine speed and fuel consumption at the same time. This model is also equipped with the auto warm-up feature for cold starts so it handles high power demand appliances momentarily.

Power control

Two Yamaha EF2000iS hooked upTwo Yamaha EF2000iS hooked up

Handy control panel with all the necessary buttons is conveniently positioned at the front of the unit.

If you need more power you can hook up two Yamaha EF2000iS models, thanks to the TwinTech technology, and get 3600 watts of maximum power.

Low noise and emission levels

Yamaha inverter generator EF2000iS is a very quiet device even during the heavy loads. It uses a noise reduction technology and sound blocking design for the low noise level, which is in a range from 51.5 to 61 dBA.

Yamaha inverter generator is CARB compliant, making it suitable for US states that have strict emission regulations, such as California.

Price and warranty

Yamaha EF2000iS sells for approximately $990, and it is backed by three-year warranty.

User reviews


  • Small and lightweight - perfect for RV owners and at the campsite.
  • Powerful enough that can run smaller AC unit.
  • Quiet, especially in the Economy mode.
  • Controls on the control panel are conveniently located on one side, which are easy to use and are clearly marked.
  • Good for light duty work.
  • EF2000iS has a variable speed engine so it runs fast only when needed, which keeps the noise down.
  • It starts on the first pull easily.
  • DC receptacle with the included cable comes handy to recharge batteries.
  • Has a very visible fuel gage.
  • Carb fuel shut-off allows you to run the fuel system dry for storage.


  • Expensive.
  • Oil and an oil filler container are not included.


Yamaha inverter generator EF2000iS is one of the best selling portable generators with the inverter technology. It is very small and lightweight, and at the same time powerful and efficient. It is pricey, but offers great quality and advanced features, which are backed by three year warranty and many excellent reviews.

They are a great choice for every home, RV, boat and outdoor use, during the power outage and where the power is not available.

Related Articles

› Yamaha EF2000iS Review