Charging Converter VCC 1212-45 IUoU-Li

Article-No. 3308





VCC 1212 45 IUoU Li 3308

Battery-to-Battery (B2B)
Charging Technology


Starter Battery   Supply Battery

Galvanisch isoliert EN


  • High charging capacity, already within short distances
  • Significantly improved energy balance of the supply circuit
  • Outstanding protection of the supply battery and the connected consumers against sometimes very strong voltage fluctuations of dynamically controlled dynamos of newer vehicles
  • During longer distances, the IU1oU2 charging technology achieves full charging and overcharging is reliably excluded
  • Optimised characteristic lines of charging adjustable for 4 battery types by battery selector switch (acid, gel, two times AGM)
  • Automatic, adjustable power control giving priority to charging of the starter battery by the dynamo in case of strong loaded vehicle mains to ensure that the vehicle can be started at any time
  • In case of simultaneous consumption during parallel and floating operation, charging of the battery is continued or trickle charging is effected. Calculation and control of the adaptation of the charging time is effected automatically by the charging converter
  • The integrated temperature compensation automatically ensures the individual adaptation of the charging voltage to the battery temperature independently of the dynamo. Battery temperature sensor, Art.-No 2001, is required
  • Simple installation, no interventions in the starter circuit required. The unit is switched into the charging cable to the supply battery
  • The connection of a Remote Control S, Art.-No. 2075, or Remote Indicator IP67, Art.-No. 2081, or Charger State Monitor IP67, Art.-No. 2082, plug-in type, is provided and can easily be realised
  • Also suitable for an operation with EBL (electroblock) and EVS (only VCC 1212-25 and VCC 1212-45 IUoU)
  • Integrated on-board mains suppression filter ensures unproblematic parallel operation of solar systems, mains chargers and other charging sources at one battery
  • Galvanic isolation between input and output ensures absolute separation of the battery circuits for outstanding suppression of failures, for neat ground ratio on both sides, also with long supply cables, safety in case of failure (puncture 12 V/24 V or 24 V/12 V is not possible) and reliably avoids undesirable back discharge of the battery circuits
  • Control input for fully automatic controlled operation (ignition, D+ motor running) or optionally manual control by remote switch
  • If required, the measuring input allows a pure voltage control of the unit
  • The application range of the unit also covers perfect battery charging in great distance of the dynamo in large vehicles, trailers, supply containers etc.

Technical Details

Input IN Starter Battery "II"  
Nominal Voltage Battery 12 V
Recomm. Battery Capacity min. 80 Ah
Power Consumption max. 720 W
Current Draw (at lowest input voltage) max. 63 A
Current Consumption during Stand-by 0.08 A
Current Consumption OFF (K1.15/D+ without Signal) < 3 mA
Overvoltage Disconnection EURO 6+ 16.50 V
Output OUT Board Battery "I"  
Nominal Voltage Battery 12 V - 13.3 V
Battery Capacity, recommended/up to 90-300/400 Ah
Charging Current Main Charging, Phase I, 8 V up to U1, 0-15 h 45 A
Charging/Floating/Load Current, controlled, Phase U1-U2 0 - 45 A
Selectable Charging Programs AGM/Gel/Lead Acid, LiFePO4 4
Minimum Battery Voltage for Charging Start 0 V
Prelim. Charg. Current (deeply discharged battery) 22.5 A (0-8 V)
Reverse Current from Battery, OFF (K1.15/D+ without Signal) 0.000 A
Reset Voltage AGM-Gel-Lead Acid/LiFePO4 (30 sec) 12.8 V/13.4 V
Limit of Charging Voltage (Consumer Protection) 15.00 V
External Overvoltage Disconnection (20 sec.) 15.50 V
Ripple Factor Voltage < 30 mV rms
Input for Battery I Temperature Sensor yes
Charging Timer 3-fold
Safety Protect. ag. Reverse Batt./Short Circuit/Back Discharge yes
Safety Timer per Charging Phase I /U1 yes
EBL START In, Measuring Input/Charging Port yes
Charging/Trickle Charging for Starter Battery 12V 0...3 A
Overcharge Protection yes
Safety Protect. ag. Reverse Batt./Short Circuit/Back Discharge yes
Fitting Position of Unit any
Temperature Range -20/+45° C
Speed-controlled, Temperature-controlled Fan yes
Gradual Reduction of Charging Capacity at Overtemperature yes
Safety Disconnection in Case of Overheating yes
System of Protection IP21
Weight 1700 g
Dimensions, incl. Mounting Flanges 245 x 160 x 71 mm
Ambient Conditions, Humidity of Air max. 95 % RH, no condensation
Delivery Scope: Operating Manual   

Charging Programs

1 „Gel“: Charging Program for Gel Batteries, Characteristic Line IU1oU2
Adapted to closed, gas-tight gel/dryfit batteries with determined electrolyte, which are generally requiring a higher charging voltage level and longer dwell times U1 to achieve short charging times with particularly high capacity storage and to avoid total discharge. Also recommended for EXIDE MAXXIMA a high-current battery in AGM filament technology.

2 „AGM“: Charging Program for AGM/Fleece Batteries, Characteristic Line IU1oU2
Adapted to charging closed, gas-tight AGM (absorbed glass mat) batteries and batteries in lead-fleece technology requiring a particularly high level U1 with adapted dwell times for full charging and after that a moderate level U2 for trickle charge (round cell and plate technology).

4 „UNIVERSAL“: Charging Program for Lead, Acid/Lead-Acid Batteries: Characteristic Line IU1oU2
Universal program for charging and conservation of charge of acid batteries in vehicles (mixed operation mobile/stationary). Still offers short charging times, good charging factor and good acid mixing with average level U1 for open and closed, low-maintenance, maintenance-free standard, drive, lighting, solar and heavy duty batteries.

Li „LiFePO4“: Charging Program for Lithium Batteries, Characteristic Line IU1oU2
Charging program for lithium LiFePO4 batteries with completely integrated electronic system and safety circiut (BMS).


Anleitung Katalog


Fernbedienung S Ladegeraete 2075

Remote Control S (Art. 2075)

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