Silencing inverters and appliances

Thread Starter


Joined Mar 9, 2023
Hey all, just registered for this forum since I do some very basic work in electronics usually via diy projects. Mostly now for a boat/youtube channel thing I'm working on. Right now, I am refitting the boat to have all electronic cooking and appliances (except for heat). the problem is that I really can't stand the screeching etc sounds of the inverter and induction oven. The inverter is a renogy (link below). It has a 16khz whine when charging the batteries.
Secondly is the induction stove. No-name brand from amazon. Haven't measured the frequency but guessing 12 or 16khz.
While I do have a phone app to identify the frequency, I doubt it will be easy for me to use my phone to identify the component specifically if I open up these appliances. I was thinking to identify the component and then wax-pot them. Would that be feasible and safe? Any idea which components inside these appliances would be the cause of the sound?

I bought a sailboat for a reason; I don't like living with electronics noise!
Thanks for any help



Joined Aug 27, 2009
My 2¢
Retrofit for sound reduction (coil whine) on existing power electronics is not trivial (for long term reliability) as the acoustic power is a product of design choices that usually have thermal considerations. Sound damping in unit mounting and sound damping enclosures would be the choice for the inverter. For the stove, when you buy cheap, you get cheap. Switching at ~16kHz is cheaper. A stove with 25 to 50kHz switching would be better.


Joined Aug 7, 2020
1. Change to Victron. Their inverters run at about 25kHz, and they specialise in marine.
2. what do you expect from a no-name brand? Does it even pass EMC standards? Is it going to upset other equipment (such as navigation)? Who will you blame then?


Joined Mar 14, 2008
Can you mount the inverter in a location that you can line with some soundproofing material.
It should be reasonably easy to muffle 16kHz.

Don't know what you can do about the induction stove except buy one with a higher operating frequency (or use earplugs when it is being used).


Joined Sep 17, 2013
I was thinking to identify the component and then wax-pot them. Would that be feasible and safe?
Probably not, as that could cause them to overheat. Coils, e.g on transformer cores, are the most likely components to be noise sources.