hi iwant to install Victron Orion-TR Smart 12/12 DC-DC Battery to battery charger to my boat the boat is wired to a diode can i connect positive and negetive wires directly from the starter battery to the house using breakers on both batteries to the dc dc charger i want to leave the alternator and diode wiring as is the house battery is a vetus deep cycle sealed lead 110ah what size dc dc charger would i need thx colin