DC Power & Battery Monitoring

The converters, the Orion-Tr 48/12-9A and 48/24-5A, take a 48 V bank down to a steady 12 V or 24 V rail for controls, instruments and accessories, with galvanic isolation between input and output. The Orion-Tr Smart 12/24-10A is a charger: it takes a 12 V input from a starter battery or alternator and steps it up to charge a 24 V auxiliary battery through a three-stage profile, and it works behind a smart alternator.

Galvanic isolation keeps the input and output circuits separate, so a fault, a ground loop or noise on the 48 V side does not reach the 12 V equipment. On a control panel fed from a battery bank, that is the reason to use an isolated converter rather than a plain regulator.

Add up the current of what runs on the output rail, then pick the converter with headroom. The 48/12-9A gives 9 A at 12 V (110 W) and the 48/24-5A gives 5 A at 24 V (120 W). If your rail needs more than that, send us the load list.

It sits in the negative lead and measures the current in and out of the battery, then reports state of charge, time to go, voltage, current and history to your phone over Bluetooth through the VictronConnect app. There is no display on the unit and nothing to mount on a panel. It handles up to 500 A.

Match the controller to the panel array. The 75/10 suits a small array; the 100/30 and 100/50 take a larger array and higher charge current. The first number is the maximum panel voltage the controller accepts and the second is the maximum charge current in amps, so add up the panel open-circuit voltage and the array current before choosing. Send us the panel specifications and the battery bank if you would like us to check.

They are the DC-side equipment we pair with them. The SmartShunt gives a measured state of charge on the bank, and the converters and chargers run the 12 V and 24 V loads from it. See our batteries and battery storage systems pages for the banks themselves.