How do you hook up a 3rd battery?

[junior80]

I got given a new absorbed glass mat deep cycle battery and I want to wire it up in the back of the 80 to run a fridge and laptop and/or maybe some other stuff.

I already have a dual battery kit I got from auto one, it's a little black electronic box thing. was about 200bucks for the kit.

do I just go and get another one of these kits and wire the deep cycle up the same or are you meant to wire all three batteries in together?

I'm thinking i'll just buy another dual battery kit the same as what I already have.

any suggestions?

[midi73]

I would suggest that you buy one of these
http://www.sidewinder.com.au/page82.html
They are for three batteries.

[GQ4.8coilcab]

parallel it with the second deep cycle so you have 200amp/hr if they two 100amp/hr batteries etc......but its not good linking two different batteries.

[ROGQ]

parallel it with the second deep cycle so you have 200amp/hr if they two 100amp/hr batteries etc......but its not good linking two different batteries.

The only problem with this is that if one of the aux batteries shits itself the batteries will equalize leaving you with 2 farked aux batteries... was looking at this option myself but decided agaisnt it for that reason. Last thing you'd want in the middle on nowhere...