Yamaha EF2000iS Inverter Generator Review

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Here in Australia the Yamaha inverter generator range are highly-regarded, as one of the best and for good reason. The Yamaha EF2000iS is the model of choice for many people, especially those needing a small, portable and quiet inverter generator for backup power and the more popular use of recreational power.

Lets explore the main features of this model, as below we find what makes this model one of the best on the market today.

The EF2000iS uses a 79 cc 4-stroke OHV engine that is very high quality. It’s fitted with a cast iron cylinder as well, which enhances its efficiency and engine life, with superior heat dissipation compared to other small inverter engines.

This model generates a total of 2000 surge watts and 1600 running watts. And because it’s an inverter system, and comes with Yamaha’s Pulse Width Modulation (PWM) control, this generator will produce a very “clean” – i.e., pure – sine wave that is ideal for running anything from a small air conditioner to the most sophisticated and sensitive electronics like computers and laptops. 

With 1,600 running watts, the EF2000iS is not really the most effective emergency power source. However, if you only need to power a couple large appliances, like a full sized fridge and perhaps a small air conditioner – or a sump pump, lighting and a few other smaller appliances, then this model might do the job. If 1600 running watts is not quite enough, the Yamaha EF2000is is parallel compatible, which means you can join two EF2000iS models together for double the power.

The Yamaha EF2000iS inverter generator comes with a small, 4.4 litre fuel tank that takes regular unleaded. However, despite this small tank, the EF2000iS can run for 10.5 hours when under a 25% load. This is a great runtime for an inverter and confirms how fuel efficient this model is relative to the field. This model being a inverter generator has Yamaha’s smart throttle, which makes the generator run at idle when turned on, and revs up to the required speed when a load is plugged in. This is how you can get great run times from such a small fuel tank. This model is also equipped with a fuel gauge on the top, which is a great feature that some other manufacturers don’t include on their models. The Yamaha EF2000iS also has a separate fuel tap, which is very popular, as you can run the carby dry from fuel, which is very useful when you plan to put the generator into storage etc..

Starting this generator is simple a easy pull starter is used and, as discussed below, is legendary for its reliability – generally starting on the first pull, even when first cranked after coming out of the box.

The front control panel has one 15 amp outlet along with the D.C outlet for battery charging etc. Although there is only one 15 amp outlet a normal power board can be used when wanting to run multiple appliances. A oil warning light is also located on the front panel, which indicates the engine oil is low, the generator won’t start when the oil is too low, which protects the Yamaha engine from running dry. 

Yamaha inverters and the EF2000iS are legendary for their quiet running. This model is fitted with Yamaha’s most cutting-edge muffler system that results in noise levels of 51.5 dB to 61 dB. This is truly whisper quiet – so quiet in fact that most people will not know this unit is running until you get quite close to it.

Given this ultra-low noise level, it’s not surprising that the EF2000iS is one of the most popular camping generators out there.

Another huge feature of the EF2000iS and what sets it apart from the pack is its compact size and light weight. This model is only 20 kgs when dry and occupies a 2.2 cubic foot space (i.e., 490ml long, 280ml wide and 445ml high).

With this kind of true portability, the EF2000iS is a pleasure to carry and take virtually anywhere – yet another reason why the recreational-use crowd love this model.

Also a standout is the EF2000iS‘s excellent manufacturer’s warranty –  a 4-year Australia Wide warranty applies to the entire generator and covers it for defects in parts and workmanship.

  • Super quiet!
  • Very fuel efficient
  • Legendary reliability
  • Extremely lightweight & compact
  • CARB-approved
  • Good runtime
  • Great factory warranty
  • Produces very “clean” electricity

Cons :-
  • Only one 15amp outlet
  • Limited power output
  • Struggles to run bigger sized caravan air conditioners 

In our view, if you want a generator that you can use for camping or other recreational uses and, perhaps, support one or two larger appliances when emergency power is needed, the Ef2000is is one of the best and most reliable inverter generators you can buy. In particular, its fuel efficiency, quiet operation, and incredibly light weight make it a superior choice for those looking to travel with their power source. Moreover, from a quality and reliability standpoint too, Yamaha inverters are considered second to none, with the closest competitor being Honda.
Last update: Mar 14, 2018


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