Hey all.
I'm planning on installing a dual battery setup in my rig. Lot's to think about and probably lots of questions but the question I would like you to consider is this. Is there a certain compatibility that both batteries must have ? I was talking with a friend today on this subject and he thought there was something to that. Now while I'd like to go with a deep cycle unit for the second or so called "house" battery, I see no reason to use that type of unit for the first battery. Perhaps it may have to do with ampere hours or cranking amps or something like that. Any opinion on this ?

This site
http://junkyardgenius.com/charging/dual01.html gave me the ideas on how to wire it up. I thought I would use "Idea 2". Seems simple enough.
Thanks,
Tony