Victron Energy M8 Circular Connector 3-Pole BMS Extension Cable, Male/Female, 2pk

Overview

The Victron Energy M8 circular connector Male/Female 3 pole cable is an extension cable set for Victron BMS communication wiring on lithium battery installations. It is used to extend the BMS communication cables for Lithium Smart batteries used with a Smart BMS, and for Lithium NG batteries used with an NG BMS.

Each variant uses a 3-pole M8 circular male/female connection and is supplied as a bag of 2 cables. The available lengths are 1 m, 2 m, 3 m, and 5 m, giving installers room to route battery communication wiring cleanly through a battery compartment, electrical locker, or protected cable run without stretching the original leads.

Key features

• Extends Victron BMS communication cables in compatible lithium battery systems.
• Works with Lithium Smart batteries when paired with a Smart BMS.
• Works between Lithium NG batteries when paired with an NG BMS.
• Uses a 3-pole M8 circular male/female connector format for inline extension.
• Available in 1 m, 2 m, 3 m, and 5 m lengths for different battery and BMS layouts.
• Supplied as a bag of 2 cables, useful for systems that need paired BMS communication extensions.

Variants

This product is offered in multiple cable lengths so the extension can match the distance between the battery bank and the BMS without leaving excess cable where it is not needed.

The cable length changes by variant. The M8 3-pole male/female connector format and bag-of-2 packaging remain consistent across the listed configurations.

• ASS030560300: 3 m cable length. This length suits installations where the BMS is set away from the battery bank but still within the same main electrical area.
• ASS030560500: 5 m cable length. This length gives more routing space for larger battery compartments or installations where the BMS is mounted farther from the batteries.
• ASS030560100: 1 m cable length. This length works well for close battery-to-BMS layouts where only a short extension is needed.
• ASS030560200: 2 m cable length. This length adds moderate reach while keeping the cable run compact in smaller onboard electrical spaces.

Installation and setup

Use this cable where the original BMS communication lead is too short for a clean installation. On boats, that often happens when lithium batteries are installed low in a battery compartment while the BMS is mounted higher on a bulkhead or inside a nearby electrical cabinet.

Route the cable with the rest of the low-voltage control wiring where practical, keeping it supported and protected from abrasion. Avoid pulling the connector under tension, and leave enough service loop for battery inspection, BMS access, and future maintenance.

Compatibility and fit

This cable is for Victron lithium battery BMS communication connections that use the M8 3-pole male/female format. It is not a general radar, GPS, NMEA, or power cable, and it should be matched to the correct Victron battery and BMS system before installation.

Use cases on board

This extension is a good match for marine lithium battery installations where the battery bank, BMS, and system wiring need to be laid out neatly rather than forced into short factory cable lengths. It is especially useful during refits, battery compartment upgrades, and new Victron electrical system builds where service access and clean cable routing matter.

What’s included

• 2 M8 circular connector male/female 3-pole cables in the selected length.