Hi, a few weeks ago I installed a multiplus 3000/120 in my boat. I previously had a mastervolt ultra combi which was very quiet.
This unit humms a lot which I am not worried about. However, at low loads it "ticks" (note I don't think this is a relay switching). And this has now evolved into a concerning intermittent electrical buzzing/ticking. See the video below.
For context I am plugged in to a shoreline only inverting from the batteries. There is a load on the output, which seems to vary the sound. The load at time of recording is a dishwasher, PC and washing machine.
Is this normal? Or do I need to return the unit?
Thanks!