Victron Energy ASS070300100 Orion-Tr Isolated DC-DC Charger Remote Cable

Victron Energy ASS070300100 — Remote On/Off Referenced to Your Secondary Battery. The Missing Piece in Lithium BMS Builds.

Product Overview

The Victron Energy ASS070300100 is the official remote cable accessory for Orion-Tr Isolated DC-DC Chargers, designed specifically for installations where the remote on/off signal needs to be referenced to the secondary battery rather than the primary (starter) battery.

By default, the remote on/off circuit in the Orion-Tr Isolated DC-DC Charger is referenced to the primary battery typically the vehicle's starter battery. This works correctly in most standard installations. However, in systems where a lithium battery with a Battery Management System (BMS) controls the charge/discharge cycle of the secondary bank, the BMS's remote on/off signal is referenced to the secondary (lithium) battery, not the primary. Without this cable, the signal reference mismatch prevents the BMS from correctly enabling or disabling the Orion-Tr a critical integration problem in any lithium secondary battery build. The ASS070300100 resolves this by correctly referencing the remote on/off circuit to the secondary battery, allowing the BMS to take full control of the charger as intended.

Key Specifications

• Part Number: ASS070300100
• Compatible With: Orion-Tr Isolated DC-DC Chargers
• Function: References remote on/off circuit to secondary battery (e.g. lithium BMS)
• Maximum Input Voltage: 35V
• Maximum Output Voltage: 70V
• Minimum Input Voltage for Pull-Down: Approximately 4V
• Maximum Pull-Down Current: Approximately 30mA (short circuit proof)

Features & Benefits

• Secondary Battery Remote On/Off Reference — Solves the reference voltage mismatch between a BMS-controlled secondary lithium battery and the Orion-Tr's default primary-battery-referenced remote on/off circuit. Without this cable, a lithium BMS cannot correctly enable or disable the Orion-Tr — this cable is the correct and manufacturer-recommended solution for this integration.
• BMS Compatibility — Enables a lithium battery BMS to directly control the Orion-Tr Isolated DC-DC Charger — turning it on when charging is permitted and off when the BMS requires charge to be halted (due to full state of charge, cell imbalance, over-temperature, or protection events). This is correct BMS integration, not a workaround.
• Short Circuit Proof Pull-Down Circuit — The pull-down current path is protected against short circuits at approximately 30mA maximum — the cable will not damage the BMS output or the Orion-Tr remote input if a wiring fault occurs.
• Wide Voltage Compatibility — Maximum input of 35V and maximum output of 70V covers the operating voltage range of both 12V and 24V system builds using the Orion-Tr Isolated range, with sufficient headroom for charging voltage peaks.
• Low Pull-Down Threshold — A minimum input of approximately 4V for pull-down activation means low-level BMS signal outputs are sufficient to trigger the remote on/off function — no additional signal conditioning or relay required in most installations.
• Manufacturer-Official Accessory — Designed and supplied by Victron Energy specifically for this application. Correct integration, correct specifications, and covered by Victron warranty — not a field-engineered workaround.

Technical Specs