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SolarEdge "Energy per Module" monitoring question prior to PG&E interconnect

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  • SolarEdge "Energy per Module" monitoring question prior to PG&E interconnect

    The system in question has been logging data since ~Jun-14th timeframe.
    Since monitoring began the Energy per Module is inconsistent spanning modules.
    Specifically, just as example, 2 module 1.1.14 and 1.1.15 are directly adjacent to each other,
    1.1.14 shows 0.0 Wh, yet 1.1.15 shows between the 0.0 and 4.0Wh
    These are NOT the only modules in question, just using these 2 to exemplify the disparity in readings being logged/reported.

    Any SolarEdge experience that might be able to explain the disparity in data being logged/reported?

    Installer suggests they are unable to provide insights/rational until after PG&E interconnect is completed, while not being as well
    to provide any rational as to why pre-interconnect would produce this type of disparity in Energy per Module being reported/logged.

    See attached: SolarEdge_CompareSideBySideModules_EnergeyPerModul e.Jul052021.jpg --> https://drive.google.com/file/d/1YAD...ew?usp=sharing

    Any help or insights would be appreciated.

    Have as well logged support ticket with Solar-Edge and in last 4-5 days no response or activity on ticket has been provided.





  • #2
    I am by no means an expert in solar but from reading your post you seem to imply that the system is not yet tied to the grid?
    If they are not tied to any load then those readings would be very low, just a few Watts. I think the tiny readings you are seeing are within the margin of error based on the small amount of power being consumed by just the Inverter or Optimizer.

    Comment


    • #3
      Originally posted by robbyg View Post
      imply that the system is not yet tied to the grid?
      Yes.

      Originally posted by robbyg View Post
      think the tiny readings you are seeing are within the margin of error based on the small amount of power being consumed by just the Inverter or Optimizer.
      The "Energy per Module" does not infer production, it infers Potential....
      The values produced should in my expectation be consistent and not have the large disparity being observed.
      Looking for a response from a SolarEdge monitoring/reporting expert.

      Comment


      • #4
        Originally posted by RonVC View Post
        Yes.


        The "Energy per Module" does not infer production, it infers Potential....
        The values produced should in my expectation be consistent and not have the large disparity being observed.
        Looking for a response from a SolarEdge monitoring/reporting expert.
        Even if that is the case, the difference between 0 and 4WH is almost nothing. You could not even power an LED bulb on 4W of power!
        So effectively all of them are still reading Zero.

        Comment


        • #5
          That small a difference may be due to instrument error.

          Even if it is an actual difference, it's about equivalent to the energy in a fart. I wouldn't worry about it.

          Comment


          • #6
            Originally posted by robbyg View Post
            You could not even power an LED bulb on 4W of power!
            So effectively all of them are still reading Zero.
            Alright, thanks, seems the consensus is "Margin of error for the sensors reading/reporting."

            Comment


            • #7
              Following up to share 1st Full 24 hours of Energy per Module after PTO/Interconnect approval from PG&E, took 30 days....

              Still 1 module 1.1.12 @81.5Wh that seems to be under-performing compared to it's peers, but were evaluating if because Chimney shadows, that's why later in afternoon normalizes.

              SolarEdge_EnergeyPerModule.1stfull24hours.Jul232021.jpg

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