Product Code: EF4500iSE

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Yamaha EF4500iSE 4500 Watt Inverter Generator with CO Sensor
The 4500 Watt EF4500iSE weighs 194 pounds, starts with ease with its electric starter, and is capable of running an RV air conditioner, microwave oven and more all at the same time. Designed to be acoustically sound, this extremely quiet generator (53-60 dBA) features Smart Throttle which allows greater fuel efficiency and noise reduction. It will run up to 19 hours at ¼ rated load on a tank of gas. With features such as Built-In Wheels, Electric Start, and an Oil Watch Warning System, the EF4500iSE is one of the most powerful portable medium-range inverters!

Top Features

CO Sensor for Safety
Shuts off at high level CO detection
Oil Watch Warning System
Prevents engine damage from low oil
Electric Start
Makes starting effortless
4500 Watt Max Output
+ 4000 watt rated continuous output

Additional features

  • 4500 watt maximum output, 4000 watt rated continuous output ‐ Suitable for running most 15,000 BTU RV air conditioners and 1000 watt microwave oven, or two major RV appliances simultaneously.
  • Noise Block sound reduction system ‐ Very quiet 58-60 decibels.
  • Low speed running ‐ Using the most powerful engine in its class to run at a constant ultra low speed of 2600 rpm to reduce gasoline consumption, extend running time between refueling and reduce noise and engine wear.
  • Up to 15.2 hours running time - at one quarter rated load between refueling.
  • 50 state legal ‐ Meets CARB emission regulations and given highest EPA rating.
  • Pulse Width Modulation Inverter System ‐ Sine wave as clean as or cleaner than household electricity. Suitable for computers, televisions, satellite TV systems and other sensitive electronic equipment and appliances.
  • Optional wireless remote control ‐ Start and stop the generator from up to 66 feet away.
  • Electric start ‐ Effortless turn the key to star.
  • Automatic choke ‐ Easy starting even in cold climates.
  • Low oil warning system ‐ Shuts the engine off to protect the engine if the oil level drops.
  • Power meter ‐ Easy to read meter indicates the amount of power being used and the amount that’s available.
  • Hour meter ‐ Displays the amount of running time accumulated to indicate servicing or refueling interval.
  • Twin bar ‐ Aids in lifting and loading. Also utilize for transport and anti-theft security.
  • Gas gauge ‐ Indicates amount of gasoline to indicate refueling interval.
  • Factory warranty ‐ Covers the entire generator for defects in parts and workmanship for three (3) years.
  • Stylish design ‐ Attractive and practical.
  • Four wheels with parking brake ‐ Easy transport and security.


  • Model / Model Code: EF4500iSE
  • Warranty Type: 3 Year Limited Warranty
  • Dimensions (length/width/height): 30.7" x 24.3" x 27.2"
  • Dry Weight: 194 lbs
  • Engine Type: OHV, Air-Cooled, Four-Stroke, Single Cylinder
  • Displacement: 357cc
  • Capacity: 4.5 Gallons
  • Fuel Type: Unleaded Regular
  • Cooling Type: Air Cooled
  • Generator Type: Brushless, Inverter
  • Maximum AC Output: 4500 Watts
  • Rated AC Output: 4000 Watts
  • Rated AC Current / Max AC Current: 33.3/37.5 amps @ 120V
  • Noise Level 1/4 Load/ Full Load: 58 dBA / 60dBA
  • Continuous Operation at 1/4 Rated Load: 15.2 Hrs.

Customer Reviews

Based on 51 reviews
James W.
Great service

Started on first try after servicing. Tested with various machinery. Worked great. Trucking company kept me informed of delivery status. Arrived timely.

Arnold L.


Robert H.
Yamaha Generator

Recently received our generator. The customer service and shipping process were great and we did not experience any quality issues. We're very happy with our new generator and hope to get many years of use from it. Thanks so much!

Sylwester D.
Yamaha 4500 Generator

Thank you good price . Quick shipping

Cheryl D.
Yamaha 4500 watt inverter generator

Just received my Yamaha from National Supply. Was a little hesitant to have it shipped across the country but it arrived in perfect condition. It was well protected in a crate surrounded by metal. From my first conversation with National supply to delivery in my garage everything went like clockwork. Started immediately and very quiet. Would definitely recommend this generator and use National Supply again.

Verified C.

very quiet, works as advertised. a little on the heavy side to take on our RV.

Rodney C.

Used it this weekend and it is so nice to have the generator close to you and not even hardly able to hear it very Quiet
Ran it 11 hours straight and used less than a half of a tank of gas was just pulling fans and a couple Rc battery chargers so wasn't running much of a load on it but was still impressed.
And national supply was awesome to deal with and can't find a better price any where Larry was great and the other 2 people I talked with sorry don't remember there name but every one was great will definitely be buying from them again

The I.
Awesome Inverter / Generator

This generator is great. Quiet operation and handles all of our equipment in our concession trailer. The staff at National Supply were professional and eager to help in assisting in sizing the needs for a generator. Quick delivery! Thanks National Supply!!

Robert N.
Purchase Review

I've only had the new generator for a couple of weeks now...however, to date, I wish I would have purchased it years ago! I ordered it on line and the unit was at my house the next day! It was extremely easy to unpack, install the battery, oil and gas and it started up the first time! Put a few different loads on it and they were handled NO PROBLEM.

Verified C.
Great purchase!

Yamahagenerators had the best price by far that I could find on the EF4500ISE generator plus free shipping and 0 tax! Shipping was fast and I was very pleased with the way the generator was packaged and secured on the pallet. Left CA and arrived in East Texas with nary a scratch. I would not hesitate to buy here again.

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