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     hi everyone we've got a question from a      fellow voter named mark      mark asks jeff my boat is on a mooring      boy for the season and it's possible      that it might sit for say two weeks okay      that's the setup all right let's go with      some questions      does the battery combiner draw current      for the operation when no charge is      present      furthermore would the battery combiner      be drawing from either battery during      that time      and also does it matter which terminal      on the acr gets connected to the engine      battery with an alternator and house      battery okay lots of questions i'll try      to answer them      uh as      good as i can first question is yes a      battery combiner      even when the batteries are not in      parallel is effectively sensing voltage      and that's sensing of the voltage on      either post of your battery combiner      does draw power yes      so      it would be possible to disconnect or      disable that battery combiner by      removing the negative connection      and generally that negative connection      is fused so that your      battery combiner is completely disabled      uh when you're at a mooring ball now      mind you the      it's milliamps i don't think it's      measured in amps it's very small drop      but small draws do add up      considering it's    hours a day seven      days a week especially on a mooring ball      where you have no      ability to recharge your batteries from      shore power      with the acr draw batteries from either      battery bank because an acr is connected      to two um i don't know to be honest um      i think      at that point it's probably choosing one      of the two that would allow the battery      combiner to work      because as we know battery combiners um      really are in most cases not all cases      but most of them are bi-directional      and so i would think that      the battery combiner is going to be      looking at battery voltage from both      because even if one battery is not dead      but pretty empty the battery combiner      still works      so based on evidence of behavior i would      say that it's sensing from or taking      power from either      is what i would guess      also does it matter which terminal the      acr gets connected to      well      if it's a bi-directional combiner the      answer is no      right meaning if current can go from      engine battery to a house and from house      to engine then it doesn't matter      but there are some battery combiners out      there that are directional what does      that mean it means that the current can      only go from let's say engine or to      house but not from house to engine in      that case if you have a directional      battery combiner and blue seas makes      them and echo for example xantrex echo      charger is another one that's      directional then yes absolutely      which battery connects to which is      definitely going to matter because the      flow of the current can only happen in      one way      and so that's basically a little recap      on battery combiners thanks mark for      asking and thanks all of you for tuning      in i appreciate it