Buzzing noise coming from solar panel

[LydMekk]

One of my Longi 540w/72 is emitting a buzzing noise in sunlight mid day, detectable from 10m away. All others seem to be silent.
Sign of a faulty panel? I have the correct volts/watts from that 9-piece array.
I have 4 spares, should I swap it? These are also newly delivered so I have warranty.

Seems to be only the one panel.

Let me know!

 

[meetyg]

Solar panels don't usually make noise...
I would suspect a faulty connection causing some internal sparking/arcing and therefore the buzzing noise. This could be at the MC4 connectors or at the diode/junction box on the back of the panel.