Quiet. Efficient. Portable. Power.

The Yamaha EF2000iS Inverter Generator

Key Features

See it in action!

QUIET

Only 51.5 dBa @ ¼ throttle and 61 dBa @ full throttle

PORTABLE

Just 44.1 pounds and 19.3 x 11.0 x 17.9 inches

EFFICIENT

Runtime up to 10.5 hours on a single 1.1 gallon tank

POWER

Rated output: 1600 Watts / 13.3 amps @ 120VAC Max output: 2000 Watts / 16.7 amps @ 120VAC

Generators, Inverters, Inverter Generators: What’s the Difference… and Which is Better?

⇒ Check out our brief overview about generators and inverters and inverter-generators.

⇒ Learn the differences that matter, and why more and more people are choosing inverter-generators today.

⇒ We’ll also tell you why the quiet, efficient, portable, powerful Yamaha EF2000iSv2 might NOT be the right choice for you!

What actual owners are saying…

Noise a problem? Not with the EF2000iSv2

You'll be amazed at how quiet the EF2000iSv2 is!
While many generators seem to produce more noise than electricity, one of the most striking features of the Yamaha EF2000iSv2 is how quiet it is. It is so quiet that you can actually have a normal conversation with the generator running nearby. The EF2000iSv2 is rated at just 51.5 dBa at a 25% load, approximately equivalent to the noise level of a quiet suburb, or a conversation at home, and only 61 dBa under full load, about the same as a conversation in a restaurant, a typical office environment, or background music. (Source: IndustrialNoiseControl.com.)
This is achieved by using a number of noise reduction technologies to ensure the quietest operation possible. These include a sophisticated sound-blocking design, noise-absorbing glass wool construction, Yamaha’s most technologically sophisticated muffler and vibration-isolating feet, all of which help keep noise levels down even when the unit is under a heavy load.

Easy to start, run and maintain

The EF2000iS employs an auto-decompression system, which reduces compression and makes start-up easier. It also boasts an auto-warm-up function. This increases engine speed during cold starts, producing the power that high-demand appliances need without waiting.
It has a convenient, centralized control panel, which allows you to easily access all of the generator’s features. The fuel gauge allows fuel level to be seen at a glance, while Yamaha’s Oil Watch Warning System constantly monitors oil levels and indicates when an oil change is needed. This helps avoid damage to the engine that can result from low oil levels, and lead to costly repairs. The OHV engine comes with a steel camshaft and valve train components, and a cast iron cylinder liner for efficiency, reliability and durability.

Powerful inverter system delivers cleaner electricity

The Yamaha EF2000iSv2 generator uses an innovative inverter system with Pulse Width Modulation (PWM) (see more about Generators vs Inverters). This means that the power output by this unit is in the form of pure sine waves, cleaner than even many commercial sources of electricity, and far superior to standard-alternator generators. What this means is that the power provided by the EF2000iSv2 is suitable for today’s delicate electronic devices that rely on microchip circuitry, such as computers, TVs, and many appliances and tools.
The unit also features an electrical overload breaker which will prevent damage to the generator should an unexpected overload occur.

Exceptionally fuel efficient

The EF2000iSv2 is also exceptionally fuel efficient – in economy mode, it can run continuously for up to 10.5 hours on a single 1.1-gallon tank of fuel. And with Yamaha’s Smart Throttle Load feature, the generator automatically adjusts the engine speed to match the load, resulting in both less noise and greater overall fuel efficiency.

Flexible power output possibilities

Out of the box, the EF2000iSv2 is rated for 1600 watts (max. 2000 watts) and 13.3 amps (max. 16.7 amps) @ 120V AC. In addition, the unit can output 8A/12V DC with the included cables, ideal for charging car, RV and boat batteries.
But that’s not all – using Yamaha’s TwinTech™ technology you can connect two units for 3600 watts, 30 amps of maximum power (requires the TwinTech accessory cable available at extra cost).

Easy to transport, store and service

With an extra-large comfort-grip handle, the Yamaha EF2000iSv2 is light-weight (it weighs a mere 44 pounds) and compact (just 2.2 cubic feet) which makes it unusually easy to transport and store. It has a fuel petcock that lets you shut off the gas supply to run the carburetor dry when you plan to store it for a while, and helps prevent stale gas problems. The side panels are easily detachable for quick and easy servicing.

Environmentally Friendly - EPA and CARB compliant

Many generators can’t be sold in California because they don’t meet the stringent emissions requirements of the California Air Resources Board (CARB). Yamaha EF2000iSv2 generators have the longest emission engine durability ratings issued by the Environmental Protection Agency (EPA) and the California Air Resources Board, and meets even strict EPA and CARB standards for low emissions.

3-year warranty

The Yamaha EF2000iSv2 comes with a 3-year limited factory warranty, and additional protection — Yamaha Extended Service (YES) — is available for an additional 1, 2 or 3 year period.

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