Votronic 3362 VCC 1212-70 CI 12V to 12V 70A B2B Charging Converter

The VCC 1212-70 from Votronic (3362) is a fully automatic, non-isolated battery charging converter designed for special-purpose vehicles, high-end 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 service batteries (living area/on-board batteries) from the alternator (starter battery) while driving. The device ensures a full IU1oU2 charging characteristic curve even while driving. The maximum charging current of the VCC 1212-70 is 70A, and it is compatible with lead-acid, gel, AGM1, AGM2, and LiFePO4 batteries. This device charges a 12V battery from a 12V battery or alternator.

Unlike a conventional isolating relay, the charging voltage is lowered or raised according to the charging program settings, making it particularly well-suited for Euro 6 and Euro 6+ vehicles.

Versatile all-rounder

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

Key features of the Votronic 3362 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
• It increases or decreases the voltage to the necessary level to precisely charge the on-board battery using its optimal charging curve.
• It fully compensates for line losses and voltage fluctuations from the alternator, which occur constantly and to a significant degree, for example, in Euro 6 vehicles (intelligent alternators).
• Features a compact design, low weight (high-frequency switch-mode technology), and robust power components for safe operation.
• Significantly improved energy balance of the on-board battery. No interference with the starter circuit; the device behaves like a high-power load on the alternator.
• The 12 V loads supplied are protected against overvoltage and voltage fluctuations.
• The charging voltage is free of spikes and regulated to prevent overcharging of the batteries.
• 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 off.
• Parallel and buffer operation: Even with simultaneous power consumption, the battery continues to charge or remains fully charged. The device automatically calculates and monitors the adjustment of charging times.
• Monitoring-free charging: Multiple protection against overload, overheating, overvoltage, short circuits, malfunctions, and battery reverse discharge through electronic regulation up to complete disconnection of the device from the battery.
• Built-in electrical system filter: Seamless parallel operation with other charging sources (EBL, chargers, engine and fuel generators, solar systems) on a single battery.
• Charging cable compensation: Voltage losses in the charging cables are automatically compensated.
• Connection for battery temperature sensor (sensor included).
• For lead-acid batteries (flooded, gel, AGM), the charging voltage is automatically adjusted to the battery temperature. This ensures a better full charge for weaker batteries in cold weather and prevents unnecessary battery gassing at 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-acid batteries: Gentle pre-charging of the (lead-acid, gel, AGM) battery up to 8 V, followed by powerful support for the battery if any loads are still active.
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• Also ensures the automatic reactivation of a LiFePO4 battery that has been shut down by the BMS.

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

The charge converters ensure optimal and rapid charging of the service battery from the alternator while driving. Unlike a simple isolating relay, the charging voltage is raised to the level required for a full charge of the respective battery type and specified by the battery manufacturers. This allows the full charging current to flow, delivering significant amounts of power to the battery in a short time. Long charging cables and losses, as well as voltage fluctuations at the alternator, are neatly compensated for. With charging converters featuring different input and output voltages (12V/24V or 24V/12V), it is possible to easily charge a second battery even without installing a second alternator.

The charging converters thus provide the well-known high quality of battery charging from VOTRONIC chargers even while driving. The intelligent microprocessor-based charge control with “IU1oU2oU3” charging characteristics and dynamic charging time calculation automatically ensures fast and gentle full charging as well as subsequent maintenance charging of the connected batteries from any state of charge, while always allowing simultaneous power supply to loads in parallel with the main battery.

Scope of delivery:

1x Votronic 3362 VCC 1212-70 70A charging converter
1x User Manual (German)
1x Temperature sensor