yamaha EF2000iSv2


Wattage: 1600 watts / 2000 watts
Noise: 51.5 - 61 dBA
Weight: 44.1 lbs
Fuel Type: Gasoline
Runtime: 10.5 hours
Dimensions:17.9 x 11 x 19.3 inches
Rating: 4 out of 5 stars

Yamaha EF2000iSv2 Generator Review

The Yamaha EF2000isv2  portable generator just feels a bit more badass than other generators on the market. And, it’s better than its predecessors. The new controller with advanced programming is able deliver an AC output of 2000 watts and a rated AC output of 1600 watts. Although it seems like a fairly simple addition to the generator, it allows the EF2000isv2 to power up a wider range of electronics or household appliances.  The fuel tank has a healthy capacity of 1.1 gallons.

Silent Night

The absence of noise makes the EF2000isv2 generator an absolute winner. The Yamaha muffler keeps the noise level at 51.5 to 61 dB at ¼ rated load, which means it can run in the background, powering everything up without you even knowing it’s on. Another feature we like is the Smart Throttle, a load sensing RPM control that cleverly adjusts the engine speed to match the load. This has the effect of adding to noise reduction and helps with fuel efficiency.

Even more impressive – or at least we think so – is that the generator has a power flow up to 10.5 hours, which probably makes it the longest running of the smaller, portable jens. In terms of the appearance it is lightweight, compact and very cool in a retro kind of way.

Delivers Clean, High Quality Power

A feature that is becoming more prevalent with the inverter generators is the clean power that they deliver. This generator is no exception – it supplies very clean, very high quality power. To throw in some technical jargon, it has Pulse Width Modulation or PWM which keeps the voltage stability around 1% and the frequency stability at an astounding 0.1 HZ. The pure sine wave is as clean, if not cleaner than public utilities power.

Shut Off the Gas

A major concern for a lot of generators is when the gas goes stale after it hasn’t been used in a while. To stop this from happening, Yamaha has installed a gasoline petcock that allows you to shut off the gas to run the carb dry while you store it. This means gas isn’t wasted. Additionally, thanks to the fuel gauge (another new feature), you always know how much is available.

We like the Yamaha EF2000iSv2 generator a lot, and happily recommend it. Features that we especially like include the Parallel Generator capability, the OHV engine, the EPA and CARB emission ratings, the auto-decompression system, the centralized control and the two 120V AC outlets and one DC outlet as well as an outlet for charging batteries.

What We Like About the Yamaha EF2000iSv2:

  • Very quiet operation with less than 62dB noise being produced
  • The gasoline petcock runs the carb dry, saving gas
  • It has Pulse Width Modulation for extra voltage stability
  • Impressive 1600W-2000W operation range
  • It’s EPA and CARB compliant
  • It has a limited 3-year warranty

What We Don’t Like About the Yamaha EF2000iSv2:

(Definitely not deal breakers but we had to mention them)

  • Only provides 1600W
  • Fairly small 79cc engine

Our Final Thoughts

If you are after the latest in inverter generator technology, then the Yamaha EF2000iSv2 portable generator is the one you want. Admittedly it costs quite a bit more than other generators in the same category, but when you look at the upgrades, the reliability, the capacity, and accessories that add to the performance of the generator (like the RV adapter kit, the appliance load tester and the power cables), then it’s worth every cent.

It’s like the inverter generator that’s made it through puberty, gotten past the teenage years and is now all grown up; it’s perfect for all appliances and because it’s lightweight and quiet it can go absolutely anywhere with you.


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