sidraja999
New Member
Hello,
I just installed a 9 panel 400v ground mounted solar panel string to my solar setup. When the sun is shining brightly, I notice a high pitched squealing noise coming from the solar panels. It seems to be coming from multiple places....not just one panel. I cannot tell for sure exactly where it is coming from but it not just from one solar panel. The sound is sometimes continuous and sometimes it is just on-off-on-off with no pattern.
This only happens during high voltage when the sunlight is hitting the panels directly. I also noticed the noise (a bit less sound) inside the DC disconnect box which is not near the panels.
The other 2 MPPT strings never produced any noise but they did not operate at such high voltage.
I am using Tigo optimizers under each solar panel.
Sound recording 1
Sound recording 2
Also, I notice that my energy monitor inside my electrical panel shows wild fluctuation in the incoming AC power from the inverter during high producing times. Attached are photos from the graph showing the fluctuation.
Please let me know if you know the cause of this noise.
Thanks for your help!
I just installed a 9 panel 400v ground mounted solar panel string to my solar setup. When the sun is shining brightly, I notice a high pitched squealing noise coming from the solar panels. It seems to be coming from multiple places....not just one panel. I cannot tell for sure exactly where it is coming from but it not just from one solar panel. The sound is sometimes continuous and sometimes it is just on-off-on-off with no pattern.
This only happens during high voltage when the sunlight is hitting the panels directly. I also noticed the noise (a bit less sound) inside the DC disconnect box which is not near the panels.
The other 2 MPPT strings never produced any noise but they did not operate at such high voltage.
I am using Tigo optimizers under each solar panel.
Sound recording 1
Sound recording 2
Also, I notice that my energy monitor inside my electrical panel shows wild fluctuation in the incoming AC power from the inverter during high producing times. Attached are photos from the graph showing the fluctuation.
Please let me know if you know the cause of this noise.
Thanks for your help!
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