The Victron Energy Orion-Tr Smart DC-DC charger is a professional DC to DC adaptive 3-stage charger with built-in Bluetooth and Galvanic Isolation. It is designed for dual battery systems in vehicles or boats, utilizing the smart alternator and start battery to charge the service battery. The unit can be monitored and programmed via Bluetooth and can be remotely controlled with an on/off switch, featuring an engine running detection mechanism. It offers an efficient 30amp output and programmable charge profiles. The Orion-Tr Smart charger is suitable for 12V systems and works with both lead acid and lithium batteries. Multiple units can be connected in parallel to increase output power. It is designed for high temperatures, maintaining full output up to 40°C and providing protection up to 55°C.