Votronic DC-DC Charger / Booster VCC 1212-70 CI - 3362

Votronic VCC 1212‑70 CI (3362) – 12 V/12 V B2B charger with up to 70 A for Euro 6 alternators

The Votronic VCC 1212‑70 CI is a fully automatic 12 V to 12 V battery-to-battery (B2B) charger for reliable charging of your leisure battery while driving. Especially with modern Euro 6 vehicles with a smart alternator, it plays to its strengths: it stabilises the charging voltage and charges the leisure battery in a battery-friendly way according to the IUoU characteristic. The charger is suitable for lead-acid, gel, AGM and LiFePO₄ and therefore for almost all common leisure battery set-ups in motorhomes, special vehicles or boats.

Why a B2B charger is often crucial today

Many modern vehicles lower the alternator's charging voltage for efficiency reasons. The result: the leisure battery is often not fully charged while driving – especially on short journeys. The VCC 1212‑70 CI compensates for these fluctuations, converts the input voltage into a stable charging voltage and thus ensures constant, controlled charging to suit the selected battery type. This lets you make better use of the available battery capacity – even when driving time is limited.

Suitable charging programmes for lead & lithium – with protection functions

The VCC 1212‑70 CI offers adjustable charging programmes for different battery technologies. For lead batteries it works with Temperature compensation. For LiFePO₄, it adds extra protection functions including temperature monitoring and takes into account the requirements of an existing BMS. A temperature sensor is included and supports safe battery monitoring.

IUoU charging characteristic: gentle charging, stable supply

The multi-stage IUoU algorithm ensures a fast bulk charge, a clean full charge and then float charging. Consumers connected in parallel are supplied while driving without unnecessarily slowing down the charging process. The integrated reverse current block also prevents the starter battery from discharging via the leisure battery when parked.

Starter battery maintenance included (up to 5 A)

When energy is available, the VCC 1212‑70 CI supports the starter battery with a maintenance current of up to 5 A. This helps compensate for self-discharge – practical during longer periods of standing or when many consumers are connected to the on-board system.

Automatic activation & clean integration into the on-board system

Charging can start automatically via D+, ignition or voltage control. For integration into the system, connections are available for remote control, display, VBS2 and the Votronic CI bus. This allows the charger to be conveniently monitored and integrated into the on-board electrics, depending on the build.

Your benefits at a glance

• 12 V/12 V B2B charger with up to 70 A charging current
• Developed for Euro 6 / smart alternators with fluctuating charging voltage
• For lead-acid, gel, AGM and LiFePO₄ batteries
• IUoU charging characteristic for battery-friendly, complete charging
• Adjustable charging current (0–70 A) for suitable system design
• Temperature compensation (lead) + LiFePO₄ protection functions incl. temperature monitoring
• Starter battery maintenance up to 5 A integrated
• Activation via D+, ignition or voltage
• Connection options for remote control/display/VBS2/CI bus

Set contents / scope of delivery

• Votronic VCC 1212‑70 CI charger (3362)
• 2× temperature sensors
• Installation and operating instructions

If you want to reliably fully charge your leisure battery even with modern alternators – and are looking for clean, battery-friendly charging for lead or LiFePO₄ – the Votronic VCC 1212‑70 CI is a strong solution for motorhomes, boats and special vehicles.

Documents & downloads

• Manual Votronic VCC 1212-70