VOTRONIC 3321 VCC 1212-20 C 12V to 12V 20A B2B charging converter booster

The VCC 1212-20 from Votronic (3321) is a fully automatic, non-isolated, battery-to-battery charging converter, designed to operate on the tractor's 13-pin trailer connector for caravans and living cabins. The 1212-20 charging converter (booster) of the "VCC" series thus enables mobile charging of supply batteries (living area/on-board batteries) from the alternator (starter battery) while driving. In addition, the device ensures a complete IU1oU2 charging curve while driving. The max charging current of the VCC 1212-20 is 20A and it can work with Lead Acid, Gel, AGM1, AGM2 and LiFePO4 batteries. This device charges a 12V battery from a 12V battery / alternator.

Universal all-rounder

For board batteries in classic lead-acid, lead-gel or lead-AGM as well as modern lithium-LiFePO4 technology, the 8 selectable charging programs guarantee a monitoring-free, quick and gentle full charge from any state of charge with subsequent full maintenance and care of the battery. Even on short journeys, the battery is charged with full charging current. Connected 12 V consumers are automatically supplied, even if the on-board network is heavily loaded. The automatic power control ensures the necessary safety and starting ability of the vehicle.

Wireless communication

• The VCC 1212-20 is B2B- for charging 12V batteries from a 12V alternator or other battery. (Not galvanically isolated).
• Designed for operation on a 13-pin trailer connector according to ISO 11446.
• max. Charging current: 20A, input voltage range 12V, charges 12V batteries, recommended battery capacity: 50 - 160Ah
• Increases or reduces the voltage to the required level in order to be able to precisely charge the on-board battery with the optimal charging characteristic.
• It completely compensates for line losses and voltage fluctuations in the alternator, such as constantly occur to a considerable extent in Euro 6 vehicles (intelligent alternators).
• is characterized by its compact design, low weight (high-frequency switch mode technology) and powerfully dimensioned power components for safe operation.
• Significantly better energy balance of the on-board battery. No intervention in the starter circuit; the device behaves like a powerful consumer on the alternator.
• The 12 V consumers supplied are protected against overvoltage and voltage fluctuations.
• The charging voltage is peak-free and regulated in such a way that the batteries cannot be overcharged.
• Fully automatic operation: The device is constantly connected to the batteries and is automatically activated by the vehicle's running alternator. The batteries are not discharged when the engine is stopped.
• Parallel and buffer operation: If the battery is consumed at the same time, it continues to be charged or is kept fully charged. The device automatically calculates and monitors the adjustment of the loading times.
• Charging without supervision: Multiple protection against overload, overheating, overvoltage, short circuit, malfunction and reverse battery discharge through electronic regulation up to the complete separation of device and battery.
• Built-in on-board network filter: Problem-free parallel operation with other charging sources (EBL, chargers, motor and fuel generators, solar systems) on one battery
• Charging cable compensation: Voltage losses on the charging cables are automatically corrected.
• Connection for battery temperature sensor (sensor included).
• With lead batteries (acid, gel, AGM), the charging voltage is automatically adjusted to the battery temperature. In cold weather, this results in better full charging of the weaker battery, and unnecessary battery gassing is avoided in summer temperatures.
• LiFePO4 batteries: Battery protection at high temperatures and, in particular, adapted charging at low temperatures below 0 °C. Charging aid for deeply discharged lead batteries: Gentle pre-charging of the (lead-acid, -gel, AGM) battery up to 8 V, then powerful support of the battery if consumers are still switched on.

What is the added value of using a B2B charging converter?

The charging converters ensure optimal and fast charging of the supply battery from the alternator while driving. In contrast to the simple isolating relay, the charging voltage is increased to the value that is necessary for full charging for the respective battery type and is required by the battery manufacturers. In this way, the full charging current can flow and charge considerable amounts of current into the battery in a short time. Long charging lines and losses are properly regulated, as are voltage fluctuations on the alternator. In the case of charging converters with different input and output voltages (12V/24V or 24V/12V), it is possible to charge a second battery without installing a second alternator.

The charging converters thus provide the well-known high quality of battery charging of the VOTRONIC chargers even while driving. The intelligent microprocessor charging control with "IU1oU2oU3" charging characteristics and dynamic charging time calculation automatically ensures fast and gentle full charging and subsequent trickle charging of the connected batteries from any charge state and always enables the simultaneous supply of consumers parallel to the supply battery.

Scope of delivery:

1X Votronic 3321 VCC 1212-20 C battery to battery charging converter
1x operating instructions (German)
1x temperature sensor