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Which pv panels on which string?

  • 02-03-2023 6:21pm
    Registered Users Posts: 53 ✭✭

    Hi folks,

    i've recently installed panels in an east/west array, 20x420w, 8 on the east side and 12 on the west, giving 8.4 kw with a 6kw solis inverter.

    I'm getting ok output, for east west at this time of year, but don't start producing til 8am and am finished at 5pm. Located in south east.

    I've noticed that both pv1 and pv2, which i presume are the two strings, have almost identical voltage, current and generation. I know this time of the year isn't the best to differentiate them, but i would have thought the east string would start a little earlier in the morning and that the west string would be generating a little later in the evening, and higher, if there are more panels.

    Is there any way of me telling from the solis inverter which panels are connected to what string, or even how many?

    thanks a million in advance for looking!


  • Moderators, Home & Garden Moderators Posts: 5,744 Mod ✭✭✭✭graememk

    On bright overcast days there's not a huge difference in production, but on clear days you'll for sure see a difference in production at different times

  • Registered Users Posts: 1,401 ✭✭✭DC999

    Yeah, as graememk says wait until it's sunny and at a time only 1 is in sun. Some inverters only update every 5 mins (my Huawei does).

    As you West is 1.5 times bigger, you'd expect to see more output generated on that string to date. My 'West' is really closer to North so does little until later this month.

    And the string still producing well in mid-afternoon is West. If you can see the stats on a graph on a sunny day you'll know.

  • Moderators, Sports Moderators Posts: 18,641 Mod ✭✭✭✭slave1

    Sun is not rising due East and setting due West this early in the year also