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1 or 2 inverters

  • 29-03-2025 05:53PM
    #1
    Martx
    Registered Users, Registered Users 2 Posts: 50 ✭✭


    I have SAJ R5 5K S2 with 12 400 solar panels on the spliuth facing roof, which maxed is 375v on the best day. Planning to add another 10 440w panels on the north facing side of the roof which would run 390v at 100%, but because it is north facing roof, I read that it will only produce about 60% of what is produced on south facing roof part. Is it enough to upgrade inverter to 8kw, presuming that production will not go over 600v any time given or should I get second inverter installed separetely?



Comments

  • #2
    graememk
    Moderators, Home & Garden Moderators Posts: 7,017 Mod ✭✭✭✭graememk


    It's 600v per string so one inverter is fine



  • #3
    Martx
    Registered Users, Registered Users 2 Posts: 50 ✭✭Martx


    Would the amperage be ok?

    Screenshot_20250329_180349_Drive.jpg

    This isnthe manual for inverter. Thanks



  • #4
    graememk
    Moderators, Home & Garden Moderators Posts: 7,017 Mod ✭✭✭✭graememk


    https://www.boards.ie/discussion/comment/123309917#Comment_123309917

    Yeah no issue at all. If panels, it's per string



  • #5
    mjatkey
    Registered Users, Registered Users 2 Posts: 316 ✭✭mjatkey


    Guys, I'm looking at adding a couple of panels to a battery only install in an apartment (ground floor, due south facing wall), would a couple of 525W puls panels be enough for the inverter to work, or will I need at least 3 to achive 90V?

    🌞 6.96kWp PV System. West Dublin🌞



  • #6
    graememk
    Moderators, Home & Garden Moderators Posts: 7,017 Mod ✭✭✭✭graememk


    https://www.boards.ie/discussion/comment/123310025#Comment_123310025

    What's the spec sheet say for the panels?



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  • #7
    mjatkey
    Registered Users, Registered Users 2 Posts: 316 ✭✭mjatkey


    I was looking at some of the Jinko panels. I am basically looking for the most output for the smallest panel at the best price, open to suggestions. The wall that I am looking to mount them on is 3.30m wide x 1.85m high, height wise I can go a bit higher if needed, width is pretty fixed at the 3.3m.

    🌞 6.96kWp PV System. West Dublin🌞



  • #8
    Mad_Mike
    Registered Users, Registered Users 2 Posts: 1,685 ✭✭✭Mad_Mike


    With those dimensions, I'd imagine best bet would be 3 x 440/450w panels as they nearly work out bang on to match your dimensions with most being around 1.8m x 1.1m



  • #9
    mjatkey
    Registered Users, Registered Users 2 Posts: 316 ✭✭mjatkey


    https://www.boards.ie/discussion/comment/123316179#Comment_123316179

    Thanks, yeah that's what I was thinking but will 3 panels be enough for the inverter to "start" (90V on the Solis), or do panels chuck out plenty of voltage once the sun hits them?

    🌞 6.96kWp PV System. West Dublin🌞



  • #10
    Mad_Mike
    Registered Users, Registered Users 2 Posts: 1,685 ✭✭✭Mad_Mike


    Should be fine. Took a screenshot from my dads system which has 8 Jinko 440w panels facing Northwest and even with these normally not producing anything much until at least 1 or 2 pm at this time of year, you can see that they were producing 256V from 7.30 this morning, so about 35v per panel and away they go

    8jinko.jpg


  • #11
    mjatkey
    Registered Users, Registered Users 2 Posts: 316 ✭✭mjatkey


    https://www.boards.ie/discussion/comment/123316724#Comment_123316724

    Thanks.

    🌞 6.96kWp PV System. West Dublin🌞



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