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Yamaha EF4500iSE Generator: Definitive Review 2021

Yamaha ef4500ise

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TopNotch Outdoor is independent – we research, test, and rate the top products to help you make the right buying choice. We sometimes use affiliate links and may receive a small commission on your purchase. Learn more…


This is the Ultimate TopNotch Yamaha EF4500iSE Generator Review 2021.

In this comprehensive review we’ll cover:

  • Main features;
  • Power output;
  • How it’s capable of running air conditioners (RV), a microwave oven – and more all at the same time!
  • The question of how it compares in side by side analysis with other Top Generators;
  • Lots more…

So if you’re looking for TopNotch reliability from the ultimate RV accessory, you’ll love this guide.

Let’s hit the start button.

Value for Money
7
Output Power
9
Durability/Workmanship
7
Dependability and Reliability
8
Noise
8
Overall Score
78

  • Manufacturer: Yamaha
  • Weight: 194.00 lbs
  • Dimensions: 28.70 x 33.30 x 29.80 in
  • Load Run Time: 7.4 Hours
  • Wattage: 4500 watt

Bottom Line : With great features and TopNotch performance you can’t beat it

Pros


  • Delivers 4500 Watt peak power
  • Electric start
  • CARB compliant
  • Low noise levels
  • High fuel efficiency
  • Fuel gauge
  • Oil watch warning system
  • Auto choke
  • Pulse width modulation technology
  • Circuit breaker
  • Spark arrestor
  • Four wheels

Cons


  • A costly generator
  • The heavy weight makes lifting difficult

Our Verdict: Yamaha EF4500iSE Generator

For any brand, dependability is a prime factor.

Manufacturers have earned their stripes with a great range of products over the past few years.

The Yamaha EF4500iSE Generator packs the same levels of quality, performance, and reliability in a super powerful package.

It’s loaded with excellent features and great fuel efficiency.

Even with a power output of 4000 Watts, Yamaha has kept the noise level under control really well with the sound reduction system…

…demonstrating the superb standard of engineering behind this generator.

It was designed primarily for RV appliances.

But it’ll be super useful in any outdoor event and as a backup power source for your home.

The overall ease of use makes this a great choice for first-time – and more mature users.

But, all these stellar features come at a price that may exclude a segment of buyers who need something easier on the bank balance.

That’s one major reason we chose its competitors as our TopNotch Top Picks.

So shall we take a closer look?

Let’s start.

“The Yamaha EF4500iSE is a quiet portable inverter generator with a rated wattage of 4000 W and a starting wattage of 4500 W.”

Related: 10 Best Small Generators

Analysis Comparisons and Test Results: Yamaha EF4500iSE Generators

The Yamaha EF4500iSE Generator was a great piece of kit to have on our test site. In fact, some of our team argued it should be an Award Winner.

It’s also one of the most aesthetically pleasing generators we’ve tested.

When it comes to power output and optimized fuel consumption, it’s as good as our Top Picks.

Frankly, Yamaha is really pushing the boundaries of performance with its superb technology.

However, we’d have liked the power to weight ratio to be slightly better.

More like the Durostar ds4000s, in fact.

So what did our tests reveal?

Let me elaborate…

Value For Money

Make no mistake about it.

If you’re not limited by budget, this is one of the most advanced medium-range generators you’ll find.

The TopNotch Four-Stroke OHV engine delivers a solid power output along with excellent efficiency.

Yamaha ef4500ise Generator
Yamaha ef4500ise Generator

Value For Money Rating

Earthquake ig800w Portable Inverter Generator
9
Wen 56200i 2000 Watt Inverter Generator
9
Durostar ds4000s 4000 Watt Generator
9
Wolf 800w Generator
8
Honda eu2000i 2000 Watt Portable Generator
8
Briggs and Stratton Inverter Generator
8
Westinghouse Portable Generator
8
Yamaha ef4500ise Generator
7
Champion Dual Fuel Inverter Generator (3500w)
7
Yamaha ef2000isv2 2000 Watt Generator
7

What we really loved were the great features…

To start with, there’s an electric start (for easying stating even in cold climates), a low oil warning system, a power meter, a fuel gauge, and an hour meter.

There’s more.

This inverter generator comes with pulse width modulation technology. That means a clean power supply to keep your electronics safe.

What about portability?

It has four wheels that come with a parking brake.

As if that isn’t enough, you also get options for wireless remote control.

Not to forget, the noise suppression is excellent even at a higher load.

Even with all these great features, we couldn’t place the EF4500iSE generator among the top performers under this metric.

The simple reason is – price.

This isn’t the right choice for those who need a small generator that provides just enough power for charging essential equipment – it’s just unnecessarily powerful in that case.

Also, we couldn’t ignore the fact that its weight did limit the portability on our test site.

At the end of the day, it’s an excellent generator that offers the right value to a select range of users.

Output Power

Clearly, the power delivery is enough to keep everything in your RV running.

With 4000 Watts of running power and 4500 Watts of peak output, the ef4500ise will power large AC units, refrigerators, microwave ovens, and big screen TV sets.

Yamaha ef4500ise

Output Power Rating

Yamaha ef4500ise Generator
9
Durostar ds4000s 4000 Watt Generator
8
Champion Dual Fuel Inverter Generator (3500w)
8
Honda eu2000i 2000 Watt Portable Generator
8
Briggs and Stratton Inverter Generator
8
Earthquake ig800w Portable Inverter Generator
7
Wen 56200i 2000 Watt Inverter Generator
7
Yamaha ef2000isv2 2000 Watt Generator
7
Westinghouse Portable Generator
7
Wolf 800w Generator
6

Moreover, it’s also an excellent choice as a backup power source for your home.

As per the specs, it can run for 15.2 hours at 25% load.

Naturally, we put it to test.

The device comes with a 4.5 gallon fuel tank capacity which is on the larger side.

So we filled it up and ran it between 50% to 60% of the rated capacity.

The EF4500iSE ran for 8 hours without any issue.

A TopNotch performance, to say the least.

And the secret behind this performance is…

The Smart Throttle Technology that optimizes the engine speed to reduce fuel consumption.

In fact, it’s powerful enough to supply two RVs at a time.

Frankly, none of the competition could match up to its smooth power delivery and excellent wattage levels.

The combination of high power output and superb running time makes this generator a chart-topper in this metric.

Durability and Workmanship

The overall design of the generator is one of the best in this category.

Yamaha has packed all that power into a relatively compact size of 30.7×24.3×27.2 inches.

On top of that, there’s the powerful engine that gives superb performance.

Yamaha ef4500ise

Durability and Workmanship Rating

Honda eu2000i 2000 Watt Portable Generator
9
Champion Dual Fuel Inverter Generator (3500w)
9
Durostar ds4000s 4000 Watt Generator
9
Yamaha ef2000isv2 2000 Watt Generator
9
Briggs and Stratton Inverter Generator
8
Wen 56200i 2000 Watt Inverter Generator
8
Wolf 800w Generator
8
Yamaha ef4500ise Generator
7
Westinghouse Portable Generator
7
Earthquake ig800w Portable Inverter Generator
7

End Result?

Fewer vibrations and reduced engine wear.

Note that the engine comes with an electronic transistor controlled (TC) ignition for a really smooth performance.

We loved the electric start.

It’s a super practical feature that makes the start-up process incredibly easy.

Next, you get the combination of the easy-to-read power meter and an hour meter.

In addition, there’s also a gauge to check the fuel level and calculate your refueling intervals.

Heading for colder climates?

The automatic choke will make it easy to start on cold mornings.

Lastly, there is an oil level watch warning system.

All in all, it offers total peace of mind no matter where you use it.

But, there’s one problem.

The dry weight of the generator stands at 194 pounds.

Frankly, it’s not a piece of kit you’ll be handling alone in a hurry (unless deadlifting’s a favorite hobby).

Even with the twin bars for lifting and the wheels, it isn’t the right choice if you’re looking for lightweight convenience.

And another thing…

At this price point, we would have liked to see a remote control added.

Finally, when compared with the lightweight convenience of the Honda EU2200i or the Durostar ds4000s, it couldn’t hit the top ranks under this metric.

Dependability and Reliability

Obviously, the overall dependability of Yamaha products is indisputable.

And the best part is…

The Yamaha EF4500iSE Generator comes with a 3-year warranty. Now that’s what we call a promise of long-term reliability. The durability of the engine and low oil consumption make it a reliable choice for off-grid trips.

Yamaha ef4500ise

Dependability and Reliability Rating

Yamaha ef2000isv2 2000 Watt Generator
9
Honda eu2000i 2000 Watt Portable Generator
9
Yamaha ef4500ise Generator
8
Durostar ds4000s 4000 Watt Generator
8
Wolf 800w Generator
8
Briggs and Stratton Inverter Generator
8
Westinghouse Portable Generator
8
Champion Dual Fuel Inverter Generator (3500w)
8
Earthquake ig800w Portable Inverter Generator
7
Wen 56200i 2000 Watt Inverter Generator
7

Also, the low fuel consumption means you won’t need to carry extra fuel for long trips.

Not to forget, the generator also meets CARB emission regulations and matches the highest EPA norms.

There’s a full range of safety features including the AC protector, circuit breaker system,  and an overload indicator.

The output power delivers a clean sine wave (making it cleaner than household electricity) that makes it perfect for smaller, more sensitive electronics.

News Flash: Yamaha boasts the power is even cleaner than your household supply!

In terms of connectivity, it offers duplex 120V 20A and a 120V 30A ports.

One minor drawback- it’s not RV ready.

Point to be noted: You need to keep the battery charged all the time so as to keep the electric start functioning smoothly.

To sum up, Yamaha did a great job, but in terms of overall reliability, we found the Honda EU2200i slightly ahead.

One step better, the Yamaha EF2000iSv2, with some unique features stood a notch higher in this list than its older sibling.

Noise

When it comes to noise suppression, this Yamaha portable generator isn’t far behind our Top Picks.

Now, the official noise level ratings stand at 58dB to 60dB. Note – Yamaha doesn’t specify the corresponding wattage. But it does have a noise block in the form of an enclosed engine design. 

Yamaha ef4500ise

Noise Rating

Wen 56200i 2000 Watt Inverter Generator
9
Honda eu2000i 2000 Watt Portable Generator
9
Yamaha ef4500ise Generator
8
Champion Dual Fuel Inverter Generator (3500w)
8
Earthquake ig800w Portable Inverter Generator
8
Yamaha ef2000isv2 2000 Watt Generator
8
Wolf 800w Generator
7
Durostar ds4000s 4000 Watt Generator
7
Briggs and Stratton Inverter Generator
7
Westinghouse Portable Generator
7

The low engine speed ranging between 2600 rpm to 1000 rpm means the noise is kept to a minimum.

To make things even better, there’s the excellent casing design that muffles the noise and in effect creates a noise block.

Likewise, the low vibrations of the engine also minimize noise at higher outputs.

We tested it in three stages.

Firstly, at 25% load, then at 50%, and lastly at 80%.

In the first two tests, the Yamaha EF4500iSE Generator noise levels were below the 60dB mark.

Finally, when the load reached the higher end, the noise went above 60dB.

At this level, it was clearly audible from a distance of 23 feet.

That said, we have to admit the designers did a great job with their noise reduction system.

To sum up, if you need noiseless performance, the Honda EU2200i or the Wen 56200i generator are the best options.

Do bear in mind though that their power output is less.

For the right balance of high wattage and low sound levels from the sound reduction system, the EF4500iSE is definitely a top choice.

In case you’re on a lower budget, the Champion 3500W generator is another great option.

“Suitable for running RV 15,000 btu air conditioners and 1000 watt microwave oven, or two other major RV appliances simultaneously.” Yamaha EF4500iSE Generator

Conclusion: Yamaha EF4500iSE Generators

Here’s the bottom line…

The Yamaha EF4500iSE Generator is a fantastic machine.

Features like the inverter technology and the smart throttle mechanism will give you clean power delivery while minimizing fuel consumption.

On top of that, you get a range of practical features like a digital power meter, hour meter, automatic choke, and an oil watch warning system.

Let’s not forget that 4.5 – 5 gallons of fuel can last for nearly 15 hours – even so, you do need to keep an eye on the fuel level gauge. 

Now that’s a performance that’s hard to beat.

It turns out this generator is heavy on two fronts – price and weight.

And that’s why it couldn’t rise to the TopNotch Top Spots.

In short, it’s an excellent choice when you have a generous budget and you need high power output.

So, we’ve provided all the answers – now it’s your turn to make your choice.

Related: 101 Best Generators 10 Best Small Generators 

 

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