Votronic Battery Charger/Charge 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 reliably charging your leisure/auxiliary battery while driving. It is particularly effective with modern Euro 6 vehicles with regulated alternators: it stabilizes the charging voltage and charges the auxiliary battery according to the battery type using an IUoU charging profile. The charger is suitable for lead-acid, gel, AGM, and LiFePO₄ batteries, making it ideal for almost all common leisure battery setups in motorhomes, special-purpose vehicles, or boats.

Why a B2B charger is often essential today

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

Suitable charging programs for lead & lithium – with protection functions

The VCC 1212‑70 CI offers adjustable charging programs for different battery technologies. For lead batteries, it operates with temperature compensation. For LiFePO₄, it includes additional protection functions, including temperature monitoring, and takes into account the requirements of an existing BMS. A temperature sensor is included in the delivery and supports safe battery monitoring.

IUoU charging profile: gentle charging, stable power supply

The multi-stage IUoU algorithm ensures rapid bulk charging, a clean full charge, and subsequent maintenance charging. Parallel-connected consumers are supplied while driving without unnecessarily slowing down the charging process. The integrated reverse current protection also prevents the starter battery from discharging through the leisure battery when the vehicle is stationary.

Starter battery maintenance included (up to 5 A)

When power 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 – ideal for longer periods of inactivity or when many consumers are connected to the leisure electrical system.

Automatic activation & seamless integration into the leisure electrical system

The charging operation can start automatically via D+, the ignition, or voltage control. For system integration, connections for remote control, a display, VBS2, and the Votronic CI bus are available. This makes it easy to monitor the charger and integrate it into the leisure electrical system, depending on the vehicle conversion.

Your benefits at a glance

• 12 V/12 V B2B charger with up to 70 A charging current
• Designed for Euro 6 / intelligent alternators with fluctuating charging voltages
• Suitable for lead-acid, gel, AGM, and LiFePO₄
• IUoU charging profile for gentle, complete charging
• Adjustable charging current (0–70 A) for appropriate 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 your auxiliary battery fully charged reliably even with modern alternators – and are looking for a clean, battery-appropriate charge for lead or LiFePO₄ – the Votronic VCC 1212‑70 CI is a powerful solution for motorhomes, boats, and special-purpose vehicles.