Parallel strings with shading. What to do?

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4 comments

  • Official comment
    Avatar
    Curtis

    Hello Jesse, 

    Thank you for your reply. 

    I see that our Support Team is currently addressing your issue. Please provide the description of this wiring issue, and the result of the change in wire-guage, in your reply to the agent. They will be very interested in the outcome. Plus, the support ticket is where all of your questions can receive the most attention. 

  • Avatar
    Gary Hethcoat

    Hi Jesse,

    I'm going to create a support ticket for this one.  We will follow up.

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  • Avatar
    Jesse Campbell

    Okay, thanks Gary! Hopefully we can figure out what's going on and how best to get more out of these panels! I'll post back here if we make any progress so other folks can see solutions.

    0
  • Avatar
    Jesse Campbell

    As a follow-up, running just the A string or just the B string lets it get up to the full peak it should hit of 300+ watts per panel.

    I'm working with the electrical installer, it seems that they may have installed undersized wire for this string. My current guess is that as the inverter pulls more amps, the voltage drop increases to the point that the MPPT algorithm thinks it has reached a peak.

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