IU1oU2oU3 Characteristic Line of Charging

When charging a vehicle battery, it is important, that 100 % output is always available and that the charging current and the charging voltage are kept to the correct values during the complete charging cycle. In keeping with the times, this can only be achieved with units according to advanced switch mode technology (SMT), since -in contrast to former transformer-rectifier units- they distinguish by complete and precise adjustment of all instabilities (low voltage, deviating frequency and sine curve, power failure).

Due to an exactly defined characteristic line of charging IU1oU2oU3, the VOTRONIC automatic chargers in switch mode technology allow quick and effective charging of lead-acid, gel, AGM/fleece and modern lithium LiFePO4 batteries, treating the battery careful at the same time. This reliable concept of charging technique, which has emerged from the close cooperation with leading battery and vehicle manufacturers, can be used for a wide range of applications on the one hand, and, on the other hand, it can despite be adapted to the requirements of the user. The units are designed for installation in campers, offroad vehicles, ambulance cars and special purpose vehicles, and they are particularly suitable for stationary installation in the industrial range.


  • Preliminary charging totally discharged battery, gentle initial charging
  • Main charging constant, maximum charging current (I-Phase)
  • Measuring and orientation
  • Main/full charging constant charging voltage 1 (U1-Phase) cell balancing
  • Full/conserv. charging constant continuous charging voltage 2 (U2-Phase)
  • Conservation constant continious charging voltage 3 (U3-Phase)
  • Automatic battery regeneration twice a week
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