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Battery Backup for a Grid-Tied system

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  • #16
    I feel embarassed. The outbacks were part of the original proposal 3 years ago, I didn't get them because I didn't have that much $$$ at the time. This also has the explanation you were looking for

    [QUOTEThe Inverters that best match the panel configuration and also allow for one of the inverters to be connected to the Outback inverter charger are a 5000 and 3000. The 5000w will have 21 panels connected (steep roof) and the 3000w will have the 14 panels on the flat roof. The reason for choosing these inverters is to properly DC load the inverters to as close to max DC input as possible (refer to the same web page you sent a link to). The 3000 allows for 4050W/ DC, we will be inputting 3920W. The 5000 allows for 6750W and we will be inputting 5880W. [/QUOTE]

    Found AC Coupling Outback/SolarEdge doc.. I think it's what I am looking for. Thank you for your kind pointers.

    http://www.outbackpower.com/download..._tech_note.pdf


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    • #17
      Link below for the diagram by folks that installed my system including 2 solaredge and one outback. In followups they recommended to replace one of the solaredge with a scneider w6848 for the following reason
      This past year we installed 20 or so fairly complex systems and, one thing we have learned is that battery back up systems work better if some of the PV is DC connected.

      http://www.mtvsolar.com/Resources/Di...ckACCouple.pdf

      Last edited by NetComrade; 11-18-2016, 11:41 PM.

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      • ButchDeal
        ButchDeal commented
        Editing a comment
        Well I guess that is why you are so confused. Dealing with mtv solar in WV.

    • #18
      ok, upon reading a few more threads on the radian, i think i will stick with the "ROI" advice and just get a generator and wait for something that plugs into solaredge... especially since I am already wired for one, and have one (just need to fix it)

      maybe I'll get solar heated water instead this year.. was looking for a quick an easy write off

      thank you all and I appreciate the educated and "common sense" responses.

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      • #19
        You could put in a SMA Sunny Island inverter that creates an "island" during outages to keep your grid-tied system running. Including the batteries and their 120/240 transformer, it is an expensive but elegant way to go.
        BSEE, R11, NABCEP, >1200kW installed

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        • ButchDeal
          ButchDeal commented
          Editing a comment
          That is still an AC coupled solution like the outback and Schneider solutions.
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