I have the Orion TR 12/12-18 DC-DC isolated charger fitted between my (euro 6) start battery and my leisure battery but have flattened the start battery twice now when parked up with the fridge running off my leisure battery so have a couple of questions:-
1, Isn't this charger supposed isolate the start battery from the load (leisure battery) when the vehicle is not running, the way a split charge relay does?
2, Even though it's an isolated version, can it share the vehicle body negative or do I need to run a cable between the battery - terminals and charger?
3, Is there a link for a list of faults and fixes somewhere to save people asking similar questions?
4, When setting it up, what is the ideal voltage output the pot should be set, I think it's pre-set to 12.3v which seems low?
Thanks in advance.