Alternator and Perko battery switch question
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Alternator and Perko battery switch question

  1. #1
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    Default Alternator and Perko battery switch question

    My boat has an one wire alternator. I want to replace the Perko two battery switch because it's not making consistent contact on battery one. The model currently in the boat has the "Alternator Field Disconnect" feature.

    Question #1. I'm not sure if I need this feature, because everything I've read indicates that this is used when a separate voltage regulator is being used. Am I correct?

    I have traced one of the three AFD wires to the area where the alternator lives, and it is not connected to anything. The other two continue up towards the front of the boat as a pair and I've not been able to see where they terminate.

    Question #2 Where do they go to?

    Thanks,

    Leo

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  3. #2
    Platinum Member BigSteve's Avatar
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    Quote Originally Posted by Baja Leo View Post
    My boat has an one wire alternator. I want to replace the Perko two battery switch because it's not making consistent contact on battery one. The model currently in the boat has the "Alternator Field Disconnect" feature.

    Question #1. I'm not sure if I need this feature, because everything I've read indicates that this is used when a separate voltage regulator is being used. Am I correct?

    I have traced one of the three AFD wires to the area where the alternator lives, and it is not connected to anything. The other two continue up towards the front of the boat as a pair and I've not been able to see where they terminate.

    Question #2 Where do they go to?

    Thanks,

    Leo
    You need a make before break battery switch and forget about the AFD feature with a one wire set up
    Perko or Cole Hersley make them. The idea while switching batteries you don't let the alternator become unloaded sending a voltage spike thru the system
    Last edited by BigSteve; 09-12-2012 at 08:15 PM.
    If you ain't the lead dog the view is always the same !

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