Call me a commoner but other than not having to turn the switch on, I can't think of of a single benefit of not having a battery switch on a boat. Switch could keep batteries from draining, stop bad current. Heck it could keep your boat from getting stolen. Look at blue sea systems switches, acrs and battery isolators and button it up proper...protect those etecs and batteries and they'll take care of you.
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there's no such thing as normal anymore...
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