Votronic 3328 VCC 1212-70 12V to 12V 70A B2B charging converter

The VCC 1212-70 from Votronic (3328) is a fully automatic, non-isolated battery charging converter for special vehicles, high-quality motorhomes, and boats. The charging converter (booster) of the "VCC" series has been developed in accordance with the latest specifications for the mobile charging of supply batteries (living space/on-board batteries) from the alternator (starter battery) while driving. The device ensures a complete IU1oU2 charging characteristic even while driving. The maximum charging current of the VCC 1212-70 is 70A and it can work with lead-acid, gel, AGM1, AGM2, and LiFePO4 batteries. This device charges a 12V battery from a 12V battery/alternator.

In contrast to conventional isolating relays, the charging voltage is lowered or raised according to the charging program specification, making it particularly well suited for EURO standard 6, 6 + plus vehicles.

Universally applicable all-rounder

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

important features of the Votronic 3328 VCC 1212-70

• The VCC 1212-70 is a B2B charger without galvanic isolation for charging 12V batteries from a 12V alternator/battery.
• Max. charging current: 70A, input voltage range 12V, charges 12V batteries, recommended battery capacity: 60 - 260Ah
• Increases or decreases the voltage to the level required to precisely charge the on-board battery with the optimum charging characteristic curve.
• It completely compensates for line losses and voltage fluctuations in the alternator, such as those that occur constantly and to a considerable extent in Euro 6 vehicles (intelligent alternators).
• Features a compact design, low weight (high-frequency switch mode technology), and powerful dimensioned power components for safe operation.
• Significantly improved 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 free of peaks and regulated in such a way that overcharging of the batteries is impossible.
• 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 not running.
• Parallel and buffer operation: During simultaneous consumption, the battery continues to be charged or remains fully charged. The device automatically calculates and monitors the charging times.
• Monitoring-free charging: Multiple protection against overload, overheating, overvoltage, short circuit, malfunction, and battery reverse discharge through electronic regulation up to complete disconnection of the device and battery.
• Built-in vehicle electrical system filter: Problem-free parallel operation with other charging sources (EBL, chargers, engine and fuel generators, solar systems) on one battery.
• Charging cable compensation: Voltage losses on the charging cables are automatically compensated.
• Connection for battery temperature sensor (sensor included in delivery).
• For lead batteries (acid, gel, AGM), the charging voltage is automatically adjusted to the battery temperature. This results in better full charging of weaker batteries in cold weather and prevents unnecessary battery gassing 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 to 8 V, then powerful support for the battery if any consumers are still switched on.
• Also ensures the automatic activation of a LiFePO4 battery that has been switched off by the BMS

What added value does using a B2B charging converter offer me?

The charging converters ensure optimal and fast charging of the supply battery from the alternator while driving. In contrast to a simple isolating relay, the charging voltage is raised to the value required for a full charge for the respective battery type and specified by the battery manufacturers. This allows the full charging current to flow and charge the battery with considerable amounts of current in a short time. Long charging cables and losses are neatly compensated for, as are voltage fluctuations at the alternator. With charging converters with different input and output voltages (12V/24V or 24V/12V), it is possible to easily charge a second battery without installing a second alternator.

The charging converters thus provide the familiar high quality of battery charging offered by VOTRONIC chargers, even while driving. The intelligent microprocessor charge control with "IU1oU2oU3" charge characteristics and dynamic charge time calculation automatically ensures fast and gentle full charging and subsequent charge maintenance of the connected batteries from any state of charge, while also enabling simultaneous supply of consumers in parallel with the supply battery.

Scope of delivery:

1X Votronic 3328 VCC 1212-70 70A charging converter 1x Operating instructions (German) 1x Temperature sensor