Panel Issues

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  • DoItAll
    Junior Member
    • Oct 2024
    • 4

    #1

    Panel Issues

    I'll try to make a long story short but I'm in desperate need of advice/guidance from those of you who know far more than I do.

    In July of 2023, I purchased solar for my home from Fluent Solar. There are 19 SEG panels on my barn with a SolarEdge inverter (no battery). Towards the end of that summer, my production was not as expected and I was told that things looks fine and that it could take some time to build credits with the electric company. After continuing to receive electric bills all summer this year, I started looking in deeper and reaching out for help. I realized that two panels in my system do not even show in the mySolarEdge app and another of the remaining 17 barely produces 1/2 of what the others do. It turns out that Fluent moved to Canada and is not responding to any correspondence or honoring any kind of warranty. SEG said that it is likely that the panel producing less than the others has a bad diode and asked for the serial numbers of all three bad panels. They came back with the name of a company in Cincinnati that Fluent purchased my panels from and said to let them know if I encountered any issues. This company says that since Fluent bought the panels and not myself (though they had record of all of my information from the transaction), there is nothing they can do. I relayed that to SEG and now they are not returning any kind of correspondence.

    My barn is a two-story gambrel roof so it is difficult to get to the panels. I borrowed a long extension ladder to get up and see if I could see anything wrong. In the attached pic, you will see that it is the last two panels on the bottom right of the layout that are missing. Right between the last one that is working and the one that is not (2nd to last), I found a squirrel's nest underneath. I removed it and looked as good as I could and did not see any issues. The wiring is tucked up nicely so I'm not certain that is the issue, although it is a pretty strange coincidence. Are these panels daisy chained, meaning if the break in connection is between 1.1.17 and the missing one to the right, the far right missing panel will be out too?

    Should I unbolt the two panels and confirm all wiring underneath and/or what would you do in my position? This was a lot of money for a system with 25-year warranted panels and everyone is throwing their hands up and saying "Not I". I'm considering legal involvement but I'm trying to avoid losing anymore money on the situation. I'm pretty handy so I am not afraid to do things myself; I just need a better understanding of how things work.

    Any help is greatly appreciated!
    Attached Files
  • chrisski
    Solar Fanatic
    • May 2020
    • 571

    #2
    I’d get all the manuals and start reading. Could be a setup error or glitch in the software. The manuals will have that, but individual panel data might need installer codes:

    How are you getting data from each panel? I have seen individual panel data from an AC coupled system, but you don't have that.

    Do you have a total watt hours produced and does this match the sum of all 17 panels or is there an extra two panels worth of production?

    You can go to solar reviews dot com and at that website those with reviews are in business 5 years. Someone local to you could be knowledgeable or willing to come out and take a look, but that won’t be cheap.

    Running into warranty issues is unfortunately common and many companies are out of business by the end of their warranty period.

    Comment

    • DoItAll
      Junior Member
      • Oct 2024
      • 4

      #3
      The mySolarEdge app has each panel displayed, along with the amount of energy generated for that day in real time. There are two panels clearly missing from the grid in the app and my production is not what is was spec'd to be. I only recently met the production total that I should have met back in early July.

      I have total watt hours produced, yes, and it it clearly short by multiple panels as noted above and in the first screenshot I attached.

      I'm going to pull the first bad panel and see if I can see any break in the connection. My concern is the procedure for doing so...do I just need to shut down the system? Are there any ramifications for unplugging and reseating the connection on the first bad one?

      If I can't find anything, I will have to seek a professional.

      Comment

      • chrisski
        Solar Fanatic
        • May 2020
        • 571

        #4
        Not knowing the specifics of the system, I can’t tell you what to do. The panels if in series could be 400 volts so I would not unplug them.

        if it were my system, I’d shut off the two MPPTs, trip the breakers for each of my six strings, and then unplug the panels.

        Comment

        • DoItAll
          Junior Member
          • Oct 2024
          • 4

          #5
          System size: 7.695 kw
          Inverter: SolarEdge SE6000H-US000BNU4
          Panels: (19) SEG405BMDHV

          Comment

          • chrisski
            Solar Fanatic
            • May 2020
            • 571

            #6
            I am unfamiliar with the solar edge. I know Victron and Outback Power.

            You could go to DIYsolarforum dot com

            Many users and responses.

            Comment

            • Mike 134
              Solar Fanatic
              • Jan 2022
              • 423

              #7
              You have optimizers under each panel on the roof. Read your manual you'll see that when the wires are not connected to the inverter you get 1 volt per panel so if you have 10 panels on that string you'll read 10 volts. That will at least tell you if all your optimizers on that string are working.

              Good luck

              Comment

              • Will792
                Member
                • Jan 2019
                • 82

                #8
                Most likely you have 2 strings, with 10 and 9 panels/optimizers. Advice above is good for checking optimizers in each string. It is possible that wiring from panel to optimizer is damaged and 2 optimizers are not active because of that. I would turn off inverter, remove each of 2 “missing” panels and measure open circuit voltage on MC4 connectors. Should be 40+ V when panel is directly exposed to sunlight. You would also visually verify that panel wiring looks OK. Voltage on panel to optimizer is less than 50V so it is safe. If inverter is off voltage on the other side of optimizer is also low so it is safe as well.

                Also check historical data for 2 missing panels. If these 2 panels used to be active then something happened since, like squirrels chewing through panel’s cables. I think SE gives access to historical data at panel level to system owners but I do not know that for sure.

                Overall PV systems are relatively easy to troubleshoot. You cannot rely on manufacturers of components to do troubleshooting for you. Typically it is responsibility of the installer to find a failed component and submit a warranty claim. Since you do not have that you need to identity if panels, optimizers or wiring from panels to optimizers are at fault.

                Comment

                • Will792
                  Member
                  • Jan 2019
                  • 82

                  #9
                  Originally posted by chrisski
                  Not knowing the specifics of the system, I can’t tell you what to do. The panels if in series could be 400 volts so I would not unplug them.

                  if it were my system, I’d shut off the two MPPTs, trip the breakers for each of my six strings, and then unplug the panels.
                  He has SolarEdge system with optimizers. Optimizer reduces output voltage to 1V, unless it gets signaling from the inverter.

                  Comment

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