Dual batteries set up....Need help please

I am wanting to move the battery from out of the engine compartment and install it in the trunk area which i know how to do.I figure while i am at it i would go ahead and install a separate battery for my air ride system.Could someone fill me in on how to wire in the second battery so that it will accept a constant charge for the air system.....UPFRONT THANKS

 

You gonna' have that big ol' Buick at Pistons and Paint?

 

positive to positive and neg to neg

 

So you are saying to simply run two cable from the battery hooked up to the engine.Will i get adequate charging to both batteries,or will i need to beef up the alternator???

 

Wire them in parallel.

 

you should be fine with the alt u r using.......your just doubling up the capacity.

 

It would be useful to know the .......

1. size of the Alternator (output)
2. size of your batteries Amphere hour
3. expected current draw from both systems car and Air

I ***ume the Air will only draw curent when the compressor is on and not all the time ??

should give you an idea if you need an alternator upgrade

 

Get yourself one of those dual battery isolaters they sell in RV shops. Not the dual battery switch, get the isolator that splices into your alternator output.

If you parallel the two batteries, yes you will increase the capacity, but you will also draw equally from each battery. I ***ume you want to have a good battery to start your car after you've finished playing with the air ride.

 

I will be running two Optima red tops. And yes the second battery will be dedicated to the air compressor when it periodically turns on.I am currently running a 60 amp alternator,and for the record i am willing to install a larger amp alt if need be

 

what type of wicked compressor are you running that you need 2 batts?

 

Parallel as others have said...I had an off topic import with Hydros...ran the system in 12 volt parallel with the stock alternator...never had an issue...

 

Not wicked at all.They way i look at is i will also have an ace in the hole if i need it,plus i have the extra battery

 

Get yourself one of those dual battery isolaters they sell in RV shops. Not the dual battery switch, get the isolator that splices into your alternator output.

yeah... do that. the alternator charges the starting battery, then charges up the auxillary battery. my RV also has a ****on I can push to start the Motorhome with the auxillary battery should the starting battery go dead.

 

A lot of motorhomes use a continuous duty solenoid as an isolator in a very simple hookup.

With a three way switch with one side momentarily on you can rig it so that it will act as a jumper battery for the main battery but won't drain the main battery if you want to play with the air at a show.
The solenoid is like this http://www.amazon.com/gp/product/B0028OO05W just about any parts house or rv shop should have them. then you want a three way switch with ON, off and momentarily on. You run the ON side to the ignition circuit so that it shuts off with the key and turns off with the key except when you have the switch turned off. the center post goes to the switch post on the solenoid and the momentary side goes to the hot side of the aux battery so that you can use it as a jumper battery by turning on the switch when you go to start the car. Battery cable between the + side of the main battery and the solenoid. cable from solenoid to aux + side and ground the neg side.

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