Triple battery set up

Submitted: Tuesday, May 18, 2004 at 14:31
ThreadID: 12973 Views:8870 Replies:8 FollowUps:8
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I have a standard toyota set up with dual batteries in parrallel.
I have a third battery (AC Delco) which I want to connect up in the rear of my car for running a fridge, similar to a camper trailer set up.
I want a simple system and was wondering if I can connect the third battery directly to the outlet on the alternator. Will such a set up still drain my other batteries when the car is not running? If so, can a simple switch disconnecting the third battery when being used prevent draining the other batteries.
I do not want to spend big dollars on isolaters etc.. and am happy to use manual switches.
I have read a lot of previous posts but none seem to address this option.
Any advice or direction greatly appreciated.
Thanks in advance
Lachlan
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