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Unbalanced strings

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  • Unbalanced strings

    Hi my mother has just had a 4.6kw system installed with a growatt 5000tl inverter,There are 2 strings 1 is on back of house south facing and the other is more west facing.
    There are 11x285 panels on south and 5x285 on west.
    We are having problems where its only seeing about 2kw even today when sun was right out.
    If i unplugged the larger string i would get roughly 1kw,I then unplugged that string and put the bigger string and got 2kw on its own,But when both are in i get only 2kw where it should be more like 3kw.
    What i am asking is should this have been a twin tracking inverter as the panels are on different roofs.
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