1gggman1 Posted May 1, 2017 Report Share Posted May 1, 2017 I am considering adding a third battery in the rear of the vehicle, how can I do this as I am now running 2 lead acid group 75's in the engine compartment and my single Alt has only one output? I'd like to have this third AGM battery for the audio system only, but I am not certain how to do this correctly. Do I need to run an Isolator on the dedicated charge wire for the third battery, maybe a charging relay instead or am I way off base here? I thank you in advance for any advice. Link to comment Share on other sites More sharing options...
ShadeTreeMechanic Posted May 1, 2017 Report Share Posted May 1, 2017 No need for an isolator or relay. Just hook it to one of the front batteries which ever one is convenient. This way your system can have the benefit of all 3 batteries. Make sure to put a fuse at the back battery as well as the front and you should be good. Even with different types of batteries ( lead acid and AGM) people report no problems. 91 C350 Centurion conversion ( Four Door One Ton Bronco) 250A Alternator (Second Alternator Coming Soon) G65 AGM Up Front / Two G31 AGM in Back Pioneer 80PRS CT Sounds AT125.2 / CT Sounds 6.5 Strato Pro component Front Stage CT Sounds AT125.2 / Lanzar Pro 8" coax w/compression horn tweeter Rear Fill FSD 5000D 1/2 ohm (SoundQubed 7k Coming Soon) Two HDS315 Four Qubes Each 34hz (Two HDC3.118 and New Box Coming Soon) Link to comment Share on other sites More sharing options...
1gggman1 Posted May 1, 2017 Author Report Share Posted May 1, 2017 Sounds good, I guess I was overthinking it... thanks! Link to comment Share on other sites More sharing options...
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