Battery to Battery Charger Kit – Includes Victron Orion DC-DC charger

Battery to Battery Charger kit – includes Victron Orion DC-DC charger & all required components

This battery to battery charger kit includes everything you’ll need to wire in the Victron Orion DC-DC charger as part of your campervan electrical system. It includes:

• Victron Orion-Tr Smart battery to battery charger (available in isolated and non-isolated, 18A and 30A models)
• 2x MIDI fuses (40A for 18A model, 60A for 30A models)
• 2x MIDI fuse holders
• 16mm2 red & black cable (available in 3m, 6m and 9m lengths)
• Cable lugs to connect to the starter battery & positive busbar

Which battery to battery charger should you pick?

Not sure if you need the 18A or 30A model, or an isolated or non-isolated charger? Read our article about how to choose the right battery to battery charger.

Which cable length should you pick?

The cable length refers to the distance between your starter battery and your electrical system. Make sure you factor in vertical distance as well as horizontal. If in doubt, pick the next size up.

Victron Orion battery to battery chargers

The Victron Orion-Tr Smart battery to battery charger (sometimes referred to as a B2B or DC-DC charger) intelligently and safely charges your leisure batteries from your vehicle’s starter battery whilst driving. As modern vehicles use smart alternators, the option of using a basic VSR is not viable in any vehicle with a Euro 5 or Euro 6 engine. The Orion-Tr Smart B2B is simple to install and simply requires access to the vehicle’s starter battery. The 18A model charges the leisure battery at a rate of 18A/hr, and the 30A model charges at a rate of 30A/hr.

Isolated vs non-isolated battery to battery chargers

Isolated battery to battery chargers are suitable for systems where batteries don’t share a common ground, such as in a motorhome with a composite body. Non-isolated chargers can be used in systems where the batteries share a common ground. If you aren’t confident which model you need, we’d recommend opting for the isolated model as this will work in all systems.

Smart functionality

Victron battery to battery chargers have built-in Bluetooth, allowing you to connect wirelessly to the VictronConnect App, which can be downloaded from the app store on Android or iOS devices. 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.

Battery to battery charger – use cases

It is not possible to use a basic VSR in any vehicle which has a smart alternator (Euro 5 and above) or a system with a lithium leisure battery. Battery to battery chargers are therefore required in these instances. B2B chargers are also recommended as they can safely charge your leisure battery to 100% by entering the ‘absorption’ phase, which VSRs aren’t able to do.

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 Orion Tr-Smart charger can be used 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.

Looking for a stand alone Victron Energy battery to battery charger not in a kit?

View the full range of Victron Orion B2B chargers ⚡

Products that give back

We are members of 1% for the Planet. This means that for every product purchased from Nohma, 1% of the total cost will be given to The Honnold Foundation, to provide solar power to underprivileged communities. If you want your electrical system to have more of a positive impact, purchasing your components from us at Nohma will mean you can give back as well as powering your off-grid system.