Questions on series AND parallel battery bank

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  • -robw-
    Member
    • Sep 2019
    • 69
    #1

    Questions on series AND parallel battery bank

    How odd that I log in to ask a question and the last post is worded similarly.

    So, Crown sent me some charging info the other day and I noticed this battery configuration (image). Never heard of it before so I'm asking if there is any drawback to a series AND parallel battery bank.

    Currently have a 2nd system with 8 CR-305's. Two strings of four 6 volters. This series/parallel config seems to reduce 2 strings to 1?

    series-parallel.jpg
    Tags: None
    • Mike90250
      Moderator
      • May 2009
      • 16020
      #2
      No way to answer. What is the voltage & Ah of each battery ? (since you didn't say and I don't have a crown catalog here)
      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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        • SunEagle
          Super Moderator
          • Oct 2012
          • 15123
          #3
          That diagram shows 4 strings of 2 in series. For that to equal a 24V 610Ah system each battery would need to be a 12V 152.5Ah.

          Based on your 8 x 6V 305Ah batteries that diagram is not correct.

            Comment

            • -robw-
              Member
              • Sep 2019
              • 69
              #4
              Originally posted by SunEagle
              That diagram shows 4 strings of 2 in series. For that to equal a 24V 610Ah system each battery would need to be a 12V 152.5Ah.

              Based on your 8 x 6V 305Ah batteries that diagram is not correct.
              It does. Appreciate the input but that was a stupid post by yours truly. Even if I were to flip the batteries to make two 24v strings I'd still have TWO 24V STRINGS, exactly what I already have. Sorry, folks.

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