Joining batteries with a CTEK 250s DUAL system

[PeeBee]

Awesome, cheers. I haven't purchased the second battery yet. I was just going to go for a lead acid deep cycle to keep cost down. Camp trips are likely only overnighters with very little "house power" needed.

.......from under the great down under.

OK, I would go with crank for start battery, deep cycle for the normal camp stuff and keep a set of jumper leads for the odd occassion when you deplete the crank battery during winch, or even if you want to parallel the batteries. This would work as well as the Blue Seas switch. I understand the CAT brand batteries have great capacity, they are crankers but have good life as deep cycling as well, not that much dearer than an exide or full river equivalent.