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Mitigating noise from neighbor's solar panel system

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Answers

  • John KB4DU
    John KB4DU Member ✭✭✭✭

    If it is a physical noise in the upper hearing range, 10k to 20k, it pretty much has to be from a switching power supply, probably resonant with some mounting device. Maybe a sound level meter would help locate it, or an ultra sonic receiver intended for power line noise. It’s really strange it started with the wiring change. Maybe check connectors involved in the change.

  • ExpressNV
    ExpressNV Member ✭✭
    @WX&Y, If i can get my hands on those devices what should I be looking for? What would I know are the norms?

    Thank you so much for your help!
  • WX7Y
    WX7Y Eastern Utah, USAMember ✭✭✭

    I went back and looked and my spell check misspelled the FLIR camera name, sorry.

    The Mechanicals stethoscope and the FLIR camera are available on Amazon they have ton's of them depending on what you want, I tried to attach the Amazon link but the FLEX site won't allow it so just do a search on Amazon for them.

    The Cameras are available for a IPhone or a Android smartphone JUST make sure you select the correct one, or you can get a stand alone that doesn't need a smartphone.

  • ExpressNV
    ExpressNV Member ✭✭
    @John KB4DU I did a youtube search and the sound seems to be the same as in https://www.youtube.com/watch?v=qNf9nzvnd1k fast forward to 2:14 (its about 12915khz) I can't recorded the sound. Definitely started after the work was done in October.
    @ WX7Y think I can rent those at a tool rental place?
  • ExpressNV
    ExpressNV Member ✭✭
    @WX7Y I am going to look at ordering FLIR One Pro LT iOS Pro-Grade Thermal Camera for Smartphones, let me know if that is good. Then the Mechanicals stethoscope not sure which one to order?

    Hate to ask but what am I looking for when I use these products? Am I using them on the microinverters? I just need to know so I can then let my installer know what are my findings.

    Thank you again for your help
  • KD0RC
    KD0RC Broomfield, COMember, Super Elmer Moderator

    A good way to find a noisy component is to use a cardboard tube like one from a roll of paper towels. You should be able to isolate the box making the noise just by listening through the tube, with one end of the tube right next to the equipment in question.

    The FLIR is a great tool, but is really for finding a failing (i.e. HOT) part. I would start with a simple search for the offending equipment using a tube to locate it. That should give you enough info to talk with the installers about.

  • ExpressNV
    ExpressNV Member ✭✭
    @KD0RC cardboard tube to each microinverter? I have 60 of them many I can't reach because they are on a solar array system I have 4 rows of 15 panels. :/ So you think it can be the microinverters making that noise from the array to the house?
  • KD0RC
    KD0RC Broomfield, COMember, Super Elmer Moderator

    No idea what is making the noise. Just a suggestion to find the exact piece of gear that is responsible. You get to where you can hear the noise reasonably well, then listen to the equipment that you are near.

  • WX7Y
    WX7Y Eastern Utah, USAMember ✭✭✭

    Yes use them on each MicroInverter, a cardboard tube would work fin for listening for a louder Squeal then the other inverters.

    With the FLIR look at EACH Microinverter as well and any other components in the circuit, the FLIR will show bright color from blue being cooler to red to orange then yellow to I think white for the different temperatures and if you have the Temperature reading enabled of them, the FLIR will show any HOT spots with the inverters drawing more current that may be possibly being out of phase.

  • ExpressNV
    ExpressNV Member ✭✭
    I was near my solar array yesterday I can hear the same noise just being around it. I placed my ear close to one of the inverters but I couldnt really make it if it was making a noise it did not seem to be.

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