2015 Yamaha Inverter EF1000iS


2015 Yamaha Inverter EF1000iS

Inverter EF1000iS

Small but mighty. Quiet, fuel efficient, and power clean enough to run sensitive electronic equipment all in a portable 28-pound package.


  • Lightweight, easy to carry design — Compact lightweight alternator reduces weight to 27.9 lb., the lightest weight in its class
  • Smart Throttle, load sensing rpm control — Greater fuel efficiency and noise reduction by automatically adjusting engine speed to match the load
  • Auto warm-up — Automatically increases engine speed for 4 to 6 minutes to ensure smooth power delivery during cold start-ups
  • 12V DC output, battery charging cables included — Recharge 12V batteries for RV, auto, marine, etc.
  • Exclusive dual coil alternator stator — Greater output at a lower engine speed for reduced noise, fuel consumption, and engine wear
  • Centralized control panel — Easy access to controls
  • Gasoline petcock lets you shut off the gas to run the carb dry for storage — Prevents stale gas problems
  • 50cc Overhead Valve (OHV) engine — Noise-reducing operation with improved efficiency, increased reliability, and low oil consumption
  • Large fuel fill access — Wide mouth fuel fill reduces spilling and overflows during refueling
  • EPA and CARB Emission Engine Durability Rating — Yamaha generators have the longest emission engine durability ratings issued by the Environmental Protection Agency and the California Air Resources Board
  • 50 state legal — Meets emission regulations, including CARB

General Information

Manufacturer Yamaha
Model Year 2015
Model Inverter EF1000iS
Color Blue


Engine Make OHV, 4-stroke
Bore x Stroke 1
Displacement 50cc
Cooling Air
Fuel Tank Capacity 0.6 gal.


Weight 27.9 lbs. dry
Height 14.9 in.
Width 9.4 in.
Length 17.7 in.


Continuous Operating Hours 11.9 hrs. @ 1/4 rated load
AC Frequency Maximum AC Output: 1,000WRated AC Output: 900W
DC Voltage DC Output: 12VRated / Maximum AC Current: 120VStability: ±1%