The Victron Energy Orion-Tr Smart DC-DC battery charger is a professional DC to DC adaptive 3-stage charger with built-in Bluetooth for vehicles with smart alternators or 12V lithium batteries. 
 
For use in dual battery systems in vehicles or on boats where the (smart) alternator and the start battery are used to charge the service battery. The unit can be monitored and programmed via Bluetooth and can be remotely controlled via a remote on/off switch and has an engine running detection mechanism.
 
This is the ISOLATED model.
 
The Orion Tr-Smart charger can be used in 12V systems only and is suitable for both lead acid and lithium batteries. Models are available up to 400W and unlimited multiple units can be connected in parallel to increase output power. Suitable for high temperatures up to 55°C with a full rated output up to 40°C.
 
Unlimited multiple units can be connected in parallel to increase output power.  IP43 protection - When installed with the screw terminals oriented downwards.  Screw terminals - No special tools needed for installation.
 
Details and Specifications:
This listing is for ONE Converter only
Specifications:
ORI121222120 - Orion-Tr Smart 12/12-18A (220W) Isolated DC-DC charger
ORI121236120 - Orion-Tr Smart 12/12-30A (360W) Isolated DC-DC charger