Technology

A technology pioneer of electric boating.

Overview

NVH stands for Noise, Vibration and Harshness, which is an important study subject of transportation comfort. ePropulsion has developed multiple NVH control technologies that brings unforgettable boating comfort. The max indoor noise is as low as 55 dB, which is lower than the ambient noise in most boating environments. In addition, the propeller runs underwater, so you hear no noise but only the natural sound of water running. 

When you go boating with your family and friends, our NVH control technologies make every ride a pleasant and peaceful trip. Because of the peaceful motor, you don’t have to raise your voice when speaking. This means that nature is the only sound you hear.

It's a built-in advantage of an Electric drive that it’s much less noisy than traditional outboard engines, but not every electric outboard motor could achieve the NVH control level of ePropulsion. Our products are noticeably quieter than other brands of electric outboard motors. You simply can’t find a quieter electric outboard. 

How is this possible?

01

Direct drive means that the propeller directly takes the power coming from the motor without any reductions, such as a gearbox. Being a simpler device, a direct-drive mechanism has fewer moving parts which could vibrate, and the overall noise emission of the system is much lower.

Direct Drive

02

Field-oriented Control, or FOC, is introduced to the electric outboard motor for the first time by ePropulsion. FOC offers precise control features based on torque and speed. It enables the motor to: operate smoothly over the full speed range, to generate full torque at zero speed, and to have high dynamic performance with fast acceleration and deceleration.

Field-oriented Control
Outboard Sound Level Comparison

ePropulsion Spirit 1.0

A common 3-HP electric outboard motor

A common 3-HP petrol outboard engine

 55 dB    /

70 dB   /

90 dB   /

Here’s a video below of Spirit 1.0 to demonstrate the actual noise level. We guarantee there’s no any sound processing to it.

Products That Feature NVH Control

ePropulsion Brand Portfolio

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