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How to land cables correctly?

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  • How to land cables correctly?

    I'm working on conecting the CC to the batteries, is it ok to stack a lug on top of another lug? The ground from the CC needs to go to the left side of the shunt and the positive needs to stack on the battery.


  • #2
    You can stack the lugs as long as they are clean and tight. There can be a issue where you have two charging sources feeding into close short runs. Each charging source will see the others input as system voltage ( battery ) and you may not get the full current into the batteries when using both at the same time.

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    • #3
      Depending on ypur material choice and the thickness of the stack, you may find that you need to use Belleville (compression) washers (not simple lock washers!) to keep adequate compression on the lugs through temperature cycles. Hopefully this will not be necessary.
      SunnyBoy 3000 US, 18 BP Solar 175B panels.

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      • #4
        Always place the Inverter's cable (+ & -), directly onto the battery lug, so it can get the BEST possible connection, and not connected through threads, nut & washer(s). The inverter can draw huge surges for an instant, and millliohms of resistance can turn into volts of drop with hundreds of amps. It can make the difference of your inverter shutting down or staying running with a large surge.

        Charge controllers and other goodies don't care about this nearly as much as the inverter will.
        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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