The EF2800i weighs just 68 pounds, making it the lightest
generator in its class. The key is the multi-pole rotor with a small
stator. This design is smaller and lighter than a conventional twopole
alternator with a large stator—and it helps make the EF2800i
With the EF2800i, Yamaha has created one of the quietest
generators in its class (64-68 dBA). Our engineers looked at the
total design, and then made changes where they would be most
effective: engine operating speed, intake noise, exhaust noise, and
valve train noise.
The EF2800i—with its inverter system—features Pulse Width
Modulation (PWM) so wavelength distortion is less than 2.5 percent,
making it ideal for equipment that requires stable frequency and
voltage, such as computers or other sophisticated electronics.
Yamaha’s Smart Throttle feature automatically adjusts engine
speed to match the load. The result is quiet running, maximum fuel
efficiency, and a run time of 14.7 hours at ¼ rated load.
Yamaha’s Oil Watch warning system prevents engine damage,
avoiding costly repairs and minimizing down time.
Inverter system with Pulse Width Modulation (PWM)
control — Can power computers, or computer-controlled electric
tools or devices
Smart Throttle — Improves fuel economy and reduces noise
Multi-pole alternator — Excellent power output to weight ratio
GFCI (Ground Fault Interrupter Circuit) — Helps reduce the
risk of shock