Hi all. I need advice on the strange high-frequency noise from my Bluetti Apex 300 when it is on battery power.
It is clearly dependent on the load. I read in another thread that it could be a usual inverter sound, but there was no example of that sound in the thread, so I want to be sure.
There is no such sound at all while charging. Also, I don’t hear it at a 250-watt load, but I do at a 340-watt load, for example.