Product Code: EF2200iS

In-stock orders received by 2PM PST ship the same day. Click here to see when you'll receive your generator. PayPal financing available. 

3-Year Factory Warranty

On All Yamaha Generators

Free shipping

With Generator Purchases

Live Customer Support

Based In The USA

California Compliant

CARB-compliant generators

Genuine Factory New Yamaha Generators


Designed for emergency home backup portable power use, RV and camping power needs, and as a power source on many DIY home projects, the EF2200iS is the first in Yamaha’s upcoming lineup of generators exclusively equipped with CO Sensor technology to meet the Portable Generator Manufacturers’ Association’s™ (PGMA®) ANSI/PGMA G300-2018 standard to monitor carbon monoxide emissions. When the CO Sensor detects elevated levels of carbon monoxide, the EF2200iS automatically shuts off and will remain off for approximately five minutes, with indication that the generator needs to be moved to a well-ventilated space. A new CO Sensor graphic and LED indicator lights on the control panel notify the user of carbon monoxide emission levels or system malfunctions.

Top Features

CO Sensor for Safety
Shuts off at high level CO detection
High Output Engine
Powerful Yamaha MZ80 engine
Yamaha Quiet Technology
Super quiet engine operation
Twin Tech Parallel Function
Connect two EF2200iS together

Additional features

  • Powerful Yamaha 79cc Engine - Provides high power output.
  • Yamaha Quiet Technology - Outfitted with Yamaha sophisticated muffler for quiet operation.
  • Twin Tech Parallel Function - Connect two EF2200iS generators in- line with a Twin Tech cable for rated 30 AMPS of power.
  • Standard RV Outlet - No more searching for the right adapter.
  • Tri-Handle - Makes loading, unloading and moving the unit a breeze.
  • Smart Dial Knob - Simple and easy start-up.
  • Smart Throttle - Automatic load sensing adjusts power to device needs.
  • Illuminated Multi-Function LED Display - See generator status at a glance both day and night.
  • DC Outlet - Flexibility to charge and use devices.
  • Overload Reset Button - Easily restore power without shutting down the unit.
  • Yamaha Easy Carb Drain - Prevents stale fuel issues and prepares for long term storage.
  • Tool-less Rear Panel - Easily access engine compartment and perform maintenance.
  • Fuel Gauge - Easily see fuel level at-a-glance.


  • Type: Inverter
  • Maximum AC Output: 2200 Watts
  • Rated AC Output: 1800 Watts
  • Rated / Maximum AC Current: 15 / 18.3 amps @ 120V
  • Engine: OHV, air-cooled, single cylinder, 4-stroke
  • Displacement: 79cc
  • L x W x H: 21.9 x 11.8 x 18.5 in
  • Dry Weight: 55.2 lbs
  • DC Output: 3 amps @ 12V
  • Fuel Tank Capacity: 1.24 gal
  • Continuous Operation at 1/4 Rated Load: 10.5 hrs
  • Noise Level (1/4 Load - Rated Load): 57-65 dBA
  • Warranty: 3 Years Limited Warranty
  • Color: Blue

Customer Reviews

Based on 131 reviews
Justin F.
Great Generator bought from the right place

National Supply had a good price and was easy to work with. Shipping was quick. The generator is very well built and runs wonderfully.


Bought to use in camper and it runs the air condition just fine

Nate M.
Yamaha gen-set

Very happy with my recent purchase of the Yamaha generator. Works as it should. Ran my a/c unit when hooked the two generators together .

Savage A.
Good Buy

My second one of these. Solid. Quiet. Reliable. Yamaha doesn't make junk. There is a reason these are more expensive then other generators in this class. Peace of mind that it will work every time. If you maintain it and stay in the usage guidelines you will get every penny's worth of your investment back. It may outlast you.

Robert F.
Love Yamaha products

Best price I could find!

Dave M.
Great service and fast delivery.

I needed a portable generator on short notice and was pleasantly surprised to have it delivered in 3 days and in time for my trip. It was delivered in perfect condition and has run flawlessly. Highly recommend

Anthony H.
Anthony H.

Generator and bundle arrived within five days from when I ordered it, and it was packed superbly as well as double boxed. they have great customer service., if you ever have any questions about anything just drop a dime and they will help you out. A#ONE. In my book. US supply.

Roman A.
On time and on point

Item arrived on time. Not damaged, all as described. It was nice to be able to bundle with all necessary additional components to make it run in no time (oil and magnetic deep stick cap). Also, extra power inverter was a pleasant bonus. Thank you!

Mike C.
Yamaha EF2200is

We wanted this unit to run our 9200 btu air conditioner in our camper. I did install a soft start on the AC a couple of years ago. The Yamaha will start and run the AC with no problems. We even put it eco mode, operates fine.
Very pleased with decision to purchase this Yamaha unit. Thanks, Mike C.

sandiwa d.r.

First time ordering, definitely not the last. Generator arrive fast and was packed really well. Thank you!

National Supply Flag Logo White

Our Services

Free Shipping
Free shipping

On All Generators

Livre Customer Support
Live Customer Support

6:30AM-4:30PM PST

Home Delivery
Home Delivery

At No Additional Charge

Liftgate Service
Liftgate Service

Free With Select Generators