Silencing electronics squeal

[sv_isara]

Hey all, I am in the process of converting my boat to all electric. Already pulled the CNG tank out, so I'm committed, but that isn't my question...

The issue is the high pitch noises of my inverter (renogy 3kw) and induction stove (el cheapo amazon 1800w).

Inverter is a 16khz tone I believe. Don't know frequency of induction stove but it's damn loud.

I am encasing the inverter with air flow, but tue induction stove of course cannot be encased. I was thinking of trying to wax pot them. I use a frequency analyzer on my phone, but what would be the best method to identify the components inside the devices, and would wax potting or some similar method work?
These sounds are actually painful to me, and counter to why I sail!

Thanks for any pointers here.
cheers
-Peter
SV Isara