30 Amp Battery to Battery Charger for Intelligent Alternators (T6)


This compact 30 Amp battery-to-battery charger from Votronic is the perfect way to charge a 100Ah lithium or lead-acid battery.

It does exactly what it says on the box, charging at up to 30 Amps, whenever the vehicle’s engine is running.

A temperature sensor is included, along with comprehensive instructions and wiring diagrams.

2 in stock


  • The efficient charging converter ensures high charging capacity, already within short distances.
  • Full charging when driving longer distances. It increases/reduces the voltage to the level, which is required for precise charging of the board battery with the optimum charging characteristic line.
  • Cable losses and considerable voltage fluctuations of the generator, known from Euro 6 vehicles (intelligent alternators), are completely compensated.
  • The charging converters excel by their compact design, low weight (high-frequency switch mode technology) and powerfully dimensioned power components for safe operation.
  • The energy balance of the board battery is considerably improved, without intervention into the starter circuit.
  • The simultaneously supplied 12 V consumer loads are protected against overvoltage and voltage fluctuations.
  • The charging voltage is free from peaks and is controlled in such a way, that overcharging of the batteries is excluded.
  • Fully automatic operation: The unit is permanently connected to the batteries, and it is automatically activated by the running generator of the vehicle. Battery discharge in case of an engine stop is avoided.
  • Parallel and floating operation: In case of simultaneous consumption, the battery will either continue to be charged or maintained via trickle charging. Calculation and control of the adaptation of the charging times is effected automatically by the unit.
  • Unattended charging: Multiple protection against overload, overheating, overvoltage, short circuit, incorrect behaviour and back discharge of the battery by electronically controlled gradual reduction down to complete separation of unit and battery.
  • Integrated on-board mains suppression filter: Unproblematic parallel operation of charging sources (EBL, chargers, motor-driven and petrol-driven generators, solar systems) on one battery.
  • Charging cable compensation: Automatic compensation of voltage losses on the charging cables.
  • Connection for battery temperature sensor (included in the standard delivery scope): Lead batteries (acid, gel, AGM): In case of low outside temperatures, full charging of the weak battery is improved by automatic adaptation of the charging voltage to the battery temperature, and in case of summery temperatures unnecessary battery gassing will be avoided. LiFePO4 Batteries: Battery protection in case of high temperatures and particularly in case of low temperatures <0° C. Highly recommended, if the battery temperature might drop below 0 °C during operation.
  • Charging aid for deeply discharged lead batteries: Gentle preliminary charging of the (lead-acid, gel, AGM) battery to 8v, followed by powerful support of the battery, in case of possibly switched-on consumers.