Victron Orion-Tr Smart 12/48-8A DC-DC Charger

The Victron Orion-Tr Smart 12/48-8A is an isolated DC-DC charger taking a 12V source and delivering 8A of 48V charging.

Twelve volts up to 48 is the largest step in the Orion-Tr range, and 8 amps at 48V is the practical limit of what a 12V alternator can support. That output is modest by design. Drawing more would load the engine's charging system beyond what it was built for, so this suits topping up a 48V bank rather than recovering one from flat.

The arrangement suits a boat combining a conventional 12V engine system with a higher-voltage lithium or auxiliary bank, which is increasingly common with 48V trolling motors. Charging a 48V bank properly from shore power remains the primary route, with this covering the engine-running top-up.

Isolation keeps input and output electrically separate, which matters given the voltage difference between the two systems. The adaptive three-stage algorithm covers lead-acid and lithium, Bluetooth gives wireless monitoring and configuration, and engine-running detection stops charging when the source is inactive. Explore more DC-DC battery chargers.

• 12V up to 48V, the largest step in the range
• 8A is what a 12V alternator can realistically support
• For topping up a 48V bank, not recovering one
• Isolated, with Bluetooth and engine-running detection