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New PV array, inverter oddity

  • 16-07-2021 3:14pm
    #1
    harderthanf
    Registered Users Posts: 195 ✭✭


    Just finished installing a 6.8KW array (17 x Longi 400W). Belter of a day here, sun directly over head, perfect angle, no clouds, can't get the input over 5.9KW. Was on to SMA and they say the inverter I have (SB 6.0) can take up to 9000W on the input side but only put out a max of 6KW to the grid. This is looking like I am losing ~ 800W somewhere?

    Any ideas? no shading, everything else looks good!



Comments

  • #2
    graememk
    Moderators, Home & Garden Moderators Posts: 6,293 Mod ✭✭✭✭graememk


    Was on to SMA and they say the inverter I have (SB 6.0) can take up to 9000W on the input side but only put out a max of 6KW to the grid. 


    There you go, the max it can output is 6kW, 5.9 from a 6kW inverter is normal. - You'll never pass 6kW.


    It can take 9000W of panels, -perfect for over sizing arrays for less than perfect weather - you dont gain anything on the peak of the days.



  • #3
    harderthanf
    Registered Users Posts: 195 ✭✭harderthanf


    https://boards.ie/discussion/comment/117621499#Comment_117621499

    Surely it should register more than 6.0KW on the DC input side but not more than 6.0KW on the AC out put side?



  • #4
    graememk
    Moderators, Home & Garden Moderators Posts: 6,293 Mod ✭✭✭✭graememk


    No, not necessarily, if it's not being used.. it's not generated. - otherwise that excess would have to go somewhere - as heat.,



  • #5
    slave1
    Moderators, Sports Moderators Posts: 19,195 Mod ✭✭✭✭slave1


    5.9 from 6.0 inverter, happy days, everything working as expected



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