Yamaha EF2400iS Silent Inverter Generator - 2400W

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The Yamaha EF2400is Silent Inverter Generator is a 2.4kVA petrol powered inverter generator that has that little extra grunt, but is still as quiet as ever.


The Yamaha EF2400iS Silent Inverter Generator is a 2.4kVA petrol powered inverter generator that has that little extra grunt, but is still as quiet as ever. The EF2400iS is a model that brings the reliable Yamaha inverter technology used on the highly acclaimed EF2800i to the 2kVA class. Using Inverter technology, the EF2400iS is our best seller for caravans, RVs and motor homes.  Light and super quiet, it produces a massive 2400 watts of maximum power so you can run anything from a small air conditioner, refrigerator, kettle, toaster or small heater – not to forget your sensitive electronic equipment such as phones, laptops and computers.

This unit is the lightest in its class and has two handles for easy lifting so you don’t have to break your back! Not only that, it’s also currently the most compact unit in its class on the market so it’ll fit in most caravan storage boxes. A dust cover and transportation kit is also available as optional extras, as well as TwinTech Parallel Use function - for almost double the power when connecting two EF2400iS together! When we built our latest inverter generator, we listened to exactly what our customers wanted. Not only is it super-quiet (54-59dBA @ 7m), it only weighs 32 kilos and produces 2400 watts of maximum power. Cleaner, quieter and more powerful, the EF2400iS is the next step forward in generator technology.

Environment-Friendly Design
The EF2400iS has been built to clear the US EPA Phase II and CARB Tier II emissions standards (the world's strictest), as well as the 2002/88/EC standard of Europe and Japan's LEMA standard. What's more, this model is assembled in our factories that are certified under the ISO 9001 and 140001 standards and have eliminated use of toxic materials like cadmium, lead and sexivalent chrome in accordance with Yamaha's self-instigated regulations. They also boast a 97.1% recycle-ability ratio, all of which adds up to make this a very environment-friendly model.

Functional and pleasing new design
The aluminium die-cast frame and smooth, handsome lines with minimal interruptions to its flat surfaces give this model a design that is not out of place in either household or utility uses. In addition, the design provides easy access to the oil filler cap and air filter, and easier access for oil changes and other servicing.

What is the Parallel Use function?
Parallel Use means the capacity to connect two generators of the same specification and operate them together to provide quality electricity with a max. Output of roughly double that of the single unit, while retaining the same voltage and frequency. This function makes it possible to run appliances or loads too heavy for one generator. The EF2400iS is designed with a special Yamaha-specification cable to connect two units so they run simultaneously, to produce an electrical output of a maximum of 3.8 kVA, without any special operations or setting adjustment.

More about the Yamaha EF2400iS Silent Inverter Generator:

The Lightest Generator In Its Class: Weighing only 32 kg.

USFS-Approved Spark Arrestor: Eliminates errant sparks.

TwinTech™ capability: Hook up two EF2400iS's for 3800 watts of maximum power.

Auto-decompression system: Reduces compression for easier starting.

Gasoline petcock: Helps prevent carburetor contamination during storage.

Controls all on one panel: Easy access to controls.

Smart Throttle™: Varies engine speed based on load, improves fuel economy and reduces noise.

Comfortable grip handles: Easy portability and storage.

Fuel gauge: Ability to gauge fuel level without opening cap.

Oil Watch warning system: Prevents engine damage - Provides added peace-of-mind.

Electrical overload breaker: Prevents generator damage in case of overload.

Die-cast aluminum frame: Light weight, high strength.

Inverter system with Pulse Width Modulation (PWM) control: Can run products with built-in microcomputer-controlled electric tools.

DC outlet: 8A12V outlet for charging batteries (cables included).

Rubber vibration isolation feet: Absorbing feet for increased smooth operation and noise reduction.

Multi-polar alternator: Light, compact design with great power output to weight ratio.

OHV engine with cast iron cylinder liner: Efficient, reliable, powerful providing long life and excellent heat dissipation.

Easily detachable side panels: For easier serviceability.

Noise Block™ sound reduction system: Very quiet.



What is an Inverter System?
An inverter system stabilizes the amount of voltage and frequency produced by a petrol engine driven alternator through the supply of "sine wave" electricity, with a distortion ratio of less than 3%.  That's why Yamaha Inverters are the ideal power source when using precision equipment or micro-computer controlled electrical appliances.

More Controlled, Clean Power
Yamaha's Inverter system produces AC current within a controlled electrical circuit process, known as PWM (Pulse Width Modulation).  As a result, fluctuations in engine speed do not affect the voltage or frequency of the electrical output while at the same time reducing output emissions.

Multi-Polar Alternator System
The adoption of a multi-polar alternator enables the generation of more efficient, high frequency 3-phase AC current that the inverter than turns into single phase.  The high efficiency alternators on a Yamaha Inverter achieve a much lighter and more compact generating unit than conventional 2-pole rotor type alternators.

Smart Throttle
Yamaha's Smart throttle feature automatically adjusts the engine speed to precisely match the energy load.  this means much quieter, more efficient engines that run and last longer.

Unbeatable Noise Block
Yamaha's Noise Block feature, an acoustically engineered sound reduction system , utilises various sound absorbing materials, moulded cases, an intake silencer, fibreglass insulation, plus newly designed mufflers and fans to provide virtually silent running while maintaining the highest quality performance.

Quiet Muffler & Low Oil Shut-off
At the heart of every generator is a strong Yamaha engine that delivers powerful and consistent performance, that's so quiet you'll forget its running.  Every generator includes an approved spark arrestor and a low oil shut-off system for long life and added peace of mind.

Please Note: This Yamaha generator does not come with oil required to operate it. We are unfortunately unable to ship this online due to it being dangerous goods, but it can be easily found in your local hardware/auto parts store.


  • Brushless alternator
  • Inverter voltage regulator
  • Auto decompressor
  • Electronic circuit breaker system
  • Fuel level gauge
  • Oil level warning system
  • Pilot lamp
  • Noise level suppressor
  • Economy idle system (always on)
  • AC plug
  • DC charging cord
  • Dust Cover (not included - optional extra)
  • TwinTech for Parallel Use (not included - optional extra)
  • Transportation Kit (not included - optional extra)


Model: EF2400IS
UPC/ISBN: 9334786002059

Power Rating: 2400W

Generator Type: Inverter

Rated Voltage: 230V

Frequency: 50HZ

Rated Output: 2kVA

Max. Output: 2.4kVA

DC Output: 12V / 8amp

Engine Type: 0HV Air Cooled - MZ175

Displacement: 171cc

Max. Output: 4kW (5.5hp)

Starting System: Recoil

Dimensions: 527mm L x 419mm W x 461mm H

Dry Weight: 32kg

Fuel Tank Capacity: 6L (full load)

Operating Hours (Eco On): 9hr (1/4 load)

Noise Level @ 7m: 54dBa (1/4 load), 59dBA (full load)

Yamaha generator does not come with oil required to operate it.


The Yamaha EF2400iS Silent Inverter Generator is covered by the Yamaha 4 Year Manufacturer's Warranty

Reviews of Yamaha EF2400iS Silent Inverter Generator - 2400W

(5.0) based on 7 reviews.

Yamaha EF2400iS Silent Inverter Generator - 2400W

(5) By: Gary Lean on 23 March 2019
Great product will do everything I need Thanks Tentworld

Yamaha EF2400iS Silent Inverter Generator - 2400W

(5) By: Mark on 20 March 2018
Very quiet and very easy to use. It was essential to recently provide power to sensitive computers and sound equipment. It did a great job!

Yamaha EF2400iS Silent Inverter Generator - 2400W

(5) By: Rex joseph on 13 January 2018
A great product

Yamaha EF2400iS Silent Inverter Generator - 2400W

(5) By: John on 13 January 2018
This is a quality generator. Silent and easy to use.

Yamaha EF2400iS Silent Inverter Generator - 2400W

(5) By: Geoff Horton on 18 December 2017
Great.....started my winnebago’s aircon without a problem.

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