G/Day
We are planning to fit a second battery to the cruiser,and are after any advice concerning the type of isolator which is ok to use ,we're only running a laptop ,chargers and lighting off the battery and a winch once in a blue moon.
See ya's in the bush
Gaz n Shell
There are kits where another battery is on the other side.. From memory that is how the diesels have them..
http://www.ebay.com.au/itm/DUAL-BATTERY-SYSTEM-KIT-140AMP-12VOLT-AUTOMATIC-HEAVY-DUTY-4X4-CARAVAN-I0-90000-/300900773844?pt=LH_DefaultDomain_15&hash=item460f156fd4