SailNet Community - View Single Post - Selector switch or Automatic Relay
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post #4 of Old 01-13-2007
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John/SD/HS... I'm not really familiar with ACR's so hold my hand a bit here. I understand that they direct available charging current to the individual battery banks as needed. How does that eliminate the need for a battery selector switch (4 position 1-2-both-off)? How do you choose which bank you want to RUN off of and which to hold in reserve.
Old 4-pos switch're running under engine offshore under battery bank #1. All of a sudden all of your instruments go out and you trace the problem to a faulty alternator and a now dead battery bank #1. Spare alternator is installed and you switch to battery #2 to re-start the engine.
How does this work with JUST an ACR...I thought they would allow BOTH batteries to drain leaving you unable in the same scenario to re-start.
Don't you still need a 4-pos switch with an ACR to prevent such a situation?
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