Offgrid inverter

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  • Agpilot
    Junior Member
    • Sep 2021
    • 2

    #1

    Offgrid inverter

    Hello,
    My main question is what is the best offgrid inverter to buy? I currently have a 12kw, 48V growatt inverter-charger with built in controller. Built in China. I've had it in operation since this past January and already have had to change the board in it once, and now it's repeating the problem I had before the board change. My system consists of 2 arrays, 7 strings each, 3 panels each string, 315 watt panels. Combiner box below each array. 1- 7000 watt mppt growatt controller for 1st array and 1- 12kw growatt inverter/ charger with built in controller for 2nd array. I have 6 Lithium iron phosphate 48v, 100Ahr batteries. System works great for our complete home but the inverter started shutting down about every 2 weeks or so and progressively gets worse over time until it shuts down 3-5 times a day, unacceptable.
    I'm looking for a GOOD inverter that'll last for the long haul, preferably American made. Do any of the gurus here have any suggestions?
    Thanks for any input.
    Last edited by Agpilot; 09-08-2021, 04:52 PM.
  • Mike90250
    Moderator
    • May 2009
    • 16020

    #2
    If you want to wait some amount of time, Midnight Solar will have their B-17 "soon" . It's at several beta sites for testing, quite robust


    Otherwise, a solid one I can recommend is any of the Schneider XW series of inverters, pure sine, integral transfer switch for generator and grid
    One solution for grid-interactive & off-grid, residential & commercial, solar & backup power: the XW+ NA solar hybrid inverter system. Learn more.



    Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
    || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
    || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

    solar: http://tinyurl.com/LMR-Solar
    gen: http://tinyurl.com/LMR-Lister

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    • Agpilot
      Junior Member
      • Sep 2021
      • 2

      #3
      I do like what I read on the B-17, hopefully this growatt inverter will last until the B-17 is out. I'll be anxiously watching.

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