One of our customers recently had a MultiPlus 12/3000/120 installed and he sent me a little video where a very noticeable clicking (almost buzzing) sound can be heard. Sounds a bit like a relay rapidly clicking on/off.
The customer says the sound is audible with or without a load on the MultiPlus, and the inverter works normal other than that sound.
Any ideas what could be causing this, and how to resolve it?
Thanks!
-Rob-