1. Product Overview
The VOTRONIC Charge Converter VCC 1212-20 C is designed for efficient and optimal charging of on-board batteries from the vehicle's alternator while driving. It supports various battery technologies, including classic lead-acid, lead-gel, lead-AGM, and modern LiFePO4 lithium batteries. This device ensures a full, fast, and smooth charge from any state of charge, with integrated maintenance and battery care functions. It automatically powers connected 12V consumers, even under heavy load, and adjusts power to maintain vehicle starting capability.
Unlike simple cut-off relays, the VCC 1212-20 C increases the charging voltage to the optimal level required by each battery type for a complete charge. This allows for maximum charging current flow, quickly replenishing battery capacity. It effectively compensates for long charging cable losses, voltage fluctuations from the alternator (common in Euro 6 vehicles with smart alternators), and ensures stable power delivery. The intelligent microprocessor charging control with "IU1oU2oU3" charging lines and dynamic charging time calculation guarantees fast and gentle full charging, as well as charge maintenance for connected batteries.
Image 1: Front view of the VOTRONIC Charge Converter VCC 1212-20 C.
2. Safety Instructions
Please read all instructions carefully before installation and operation. Failure to follow these safety guidelines may result in property damage, injury, or death.
- Professional Installation: Installation should ideally be performed by qualified personnel with knowledge of vehicle electrical systems.
- Electrical Hazard: Always disconnect the vehicle's starter battery and on-board battery before beginning any installation work to prevent electrical shock or short circuits.
- Ventilation: Ensure adequate ventilation around the charge converter. Although designed for efficient heat dissipation, proper airflow is crucial for optimal performance and longevity.
- Cable Sizing: Use appropriately sized cables for all connections to prevent overheating and voltage drops. Refer to the specifications for current ratings.
- Battery Compatibility: Ensure the selected charging program matches your battery type (lead-acid, lead-gel, lead-AGM, or LiFePO4) to prevent damage to the battery.
- Overload Protection: The device includes multiple protections against overcharging, overheating, over-voltage, and short circuits. Do not attempt to bypass these safety features.
- Moisture: Protect the device from moisture and direct water exposure.
3. Setup and Installation
The VCC 1212-20 C is specifically designed for integration into vehicle electrical systems, particularly for charging batteries in cabins and trailers via a 13-pin trailer plug-in device. Its compact form factor and low weight facilitate flexible mounting.
3.1 Mounting
- Mount the converter in a dry, well-ventilated area, away from direct heat sources or flammable materials.
- Utilize the provided mounting brackets to secure the device firmly.
3.2 Electrical Connections
- Input Connection: Connect the input terminals to the vehicle's starter battery circuit, typically via the 13-pin trailer wiring. Ensure proper polarity. The input voltage range is 10.5 V - 16.5 V.
- Output Connection: Connect the output terminals to the on-board battery (leisure battery). Maintain correct polarity.
- D+ Signal (Optional but Recommended): For vehicles with Euro 6 engines or smart alternators, connecting the D+ signal (ignition-controlled positive) is crucial for reliable activation of the converter. This ensures the converter only operates when the engine is running.
- Temperature Sensor: Connect the included battery temperature sensor to the designated port on the converter. Place the sensor directly on the on-board battery for accurate temperature compensation, especially for lead-acid batteries. For LiFePO4 batteries, this sensor helps with low-temperature protection.
- Cable Cross-Section: Use heavy-gauge cables to minimize voltage drop, especially over longer distances. Refer to vehicle and converter specifications for recommended cable sizes.
3.3 Battery Type Selection
The VCC 1212-20 C features selectable charging programs. Consult the detailed manual (not provided here) for specific dip switch settings or configuration procedures to match your battery type (lead-acid, lead-gel, lead-AGM, or LiFePO4). Incorrect selection can damage your battery.
4. Operating Instructions
The VOTRONIC Charge Converter VCC 1212-20 C operates automatically once correctly installed and configured.
- Automatic Activation: The device is designed for fully automatic operation. It remains connected to the batteries and activates automatically when the vehicle's alternator is running (engine on).
- Charging Process: Once activated, the converter initiates a multi-stage charging process tailored to the selected battery type. It dynamically calculates and monitors charging time to ensure efficient and complete charging.
- Voltage Compensation: The converter actively compensates for line losses and fluctuations in alternator voltage, ensuring a stable and optimal charging voltage reaches the on-board battery.
- Consumer Supply: During charging, the converter simultaneously supplies power to connected 12V consumers, protecting them from surges and voltage fluctuations.
- Battery Maintenance: The intelligent charging control maintains the charge of the connected batteries, preventing overcharging and ensuring long-term battery health.
- Engine Off: When the vehicle engine is off, the converter automatically deactivates, preventing discharge of the starter battery by the on-board battery.
- LiFePO4 Specifics: For LiFePO4 batteries, the converter provides high battery protection and is suitable for low temperatures below 0°C. It gently pre-charges deeply discharged batteries (down to 8V) before applying full charging power.
- Parallel Operation: The VCC 1212-20 C can operate problem-free in parallel with other charging sources connected to the same battery.
5. Maintenance
The VOTRONIC Charge Converter VCC 1212-20 C is designed for minimal maintenance. Regular checks can help ensure its continued reliable operation.
- Visual Inspection: Periodically inspect the device and all connections for any signs of damage, corrosion, or loose wiring.
- Cleanliness: Keep the converter free from dust, dirt, and moisture. Use a dry, soft cloth for cleaning. Do not use abrasive cleaners or solvents.
- Ventilation: Ensure that the ventilation openings are not obstructed to allow for proper heat dissipation.
- Cable Integrity: Check the condition of all connected cables, especially those exposed to movement or environmental factors.
6. Troubleshooting
If the charge converter is not functioning as expected, consider the following troubleshooting steps:
- No Charging:
- Verify that the vehicle engine is running and the alternator is producing power.
- Check all electrical connections for tightness and correct polarity.
- Ensure the D+ signal (if used) is correctly connected and receiving power when the ignition is on.
- Check for blown fuses in the input or output lines.
- Low Charging Current:
- Inspect cable cross-sections. Undersized cables can lead to voltage drop and reduced charging current.
- Ensure the battery type selection on the converter matches the connected battery.
- Check the health of the on-board battery. A severely degraded battery may not accept a full charge.
- Overheating:
- Ensure adequate ventilation around the unit. Clear any obstructions from cooling fins or fan openings.
- Verify that the ambient temperature is within the operating range specified in the manual.
- Error Indicators: Refer to the specific LED indicators or display messages on your unit (if applicable) and consult the full product manual for their meaning.
If problems persist after performing these checks, contact VOTRONIC customer support or a qualified technician.
7. Specifications
| Feature | Specification |
|---|---|
| Manufacturer | Votronic |
| Item Model Number | 3321 |
| Product Dimensions | 4 x 6.7 x 14.6 cm |
| Weight | 280 grams |
| Brand Name | VOTRONIC |
| Color | Black |
| Certifications | CE |
| Input Voltage Range (EURO 6+ controlled D+) | 10.5 V - 16.5 V |
| Charging Current | 20 A |
| Recommended Battery Capacity | 50 - 160 Ah / 200 Ah |
| Number of Ports | 1 |
8. Warranty and Support
For warranty information, please refer to the documentation provided with your purchase or contact your retailer. VOTRONIC products typically come with a manufacturer's warranty covering defects in materials and workmanship.
For technical support, product inquiries, or service, please contact VOTRONIC directly or consult their official website for contact details and further resources. Ensure you have your product model number (VCC 1212-20 C, Model 3321) and proof of purchase available when seeking support.
