The Victron Energy ASS070400100 Pre-Charge Cable is designed to pre-charge the internal capacitors of an inverter, inverter/charger, or MPPT through its DC terminals before the battery's main positive connection is completed. Pre-charging brings the device toward battery voltage in a controlled manner and helps prevent arcing at the connection point when the battery is connected.

The cable features integrated status indication and alligator-clamp connections for straightforward commissioning and service work. Victron specifies operation up to 70V and a pre-charge current of up to 0.5A. The supplied product sheet also notes that a MultiPlus-II 48/5000 typically pre-charges in less than one second, while larger systems can require more time. 

Key Technology

• Controlled Capacitor Pre-Charging
  Allows the internal DC capacitors of compatible inverters, inverter/chargers, and MPPT solar charge controllers to charge before the main battery connection is completed.

• Helps Prevent Connection Arcing
  By bringing the connected equipment toward battery voltage before completing the main positive connection, the cable helps prevent arcing caused by the initial capacitor-charging current.

• Yellow Pre-Charge Indicator
  The yellow LED illuminates while the internal capacitors are charging and switches off when pre-charging is complete and the connected device has reached battery voltage.

• Reverse-Polarity Indication
  A red LED indicates reversed polarity. Victron states that reverse polarity does not damage the pre-charge cable, but the cable must be disconnected and reconnected correctly before proceeding.

• Current-Limited Pre-Charging
  Internal capacitors are charged with a current of up to 0.5A, providing a controlled method of preparing compatible equipment for the main DC connection.

• Expandable for Larger Systems
  Victron states that systems with multiple MultiPlus-II or Quattro-II units can use multiple pre-charge cables in parallel, or individual units can be pre-charged and connected to the battery one at a time.

Best Uses

• Inverter Commissioning
  Ideal for pre-charging compatible inverter DC capacitors before completing the main battery connection.

• Inverter/Charger Installation
  Suitable for compatible inverter/chargers where capacitor inrush could otherwise produce arcing during initial battery connection.

• MPPT Solar Charge Controllers
  Can be used to pre-charge compatible MPPT equipment through its DC terminals before connecting the battery.

• MultiPlus-II & Quattro-II Systems
  Useful during commissioning of compatible Victron systems, including installations with multiple inverter/charger units.

• Battery System Service
  A practical installation and service accessory when reconnecting compatible equipment containing significant DC input capacitance.

Product Specifications

Controlled Pre-Charging for Safer DC Equipment Connection

The Victron Energy ASS070400100 Pre-Charge Cable provides a simple way to charge the internal capacitors of compatible inverters, inverter/chargers, and MPPT equipment before completing the main battery connection. Integrated status LEDs, controlled charging, and straightforward clamp connections make it a useful commissioning and service accessory for compatible Victron DC systems.

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