I have a Victron 12/1200/50-16 Inverter charger with 4 x 12v 110Aph leisure batteries. I need to change the Bow thruster and Enginer batteries for maintenance free units. What do I need and what DIP switch settings should I set to
The battery capacity of the Bow thruster and engine starter batteries will be determined by the specifications of those units. This will typically give you a minimum capacity and a CCA rating. Any battery with a higher value for either of those ratings will be ok.