Victron Energy Smart BMS CL 12-100 to MultiPlus Cable

Overview

The Victron Energy ASS070200100 is a control cable for connecting a Smart BMS CL 12-100 to compatible Victron MultiPlus inverter/chargers in systems where the BMS does not use a VE.Bus interface. It lets the BMS control the MultiPlus through the remote on/off connection, so the inverter/charger can respond when the battery management system needs to protect the lithium battery bank.

This cable is used with MultiPlus 500VA-1600VA models, MultiPlus Compact 800VA-2kVA models, and MultiPlus-II models. It is also suitable for BMS products without a VE.Bus interface, including the Smart BMS CL 12-100 and smallBMS, using the Load/Charge Disconnect or Load/Charger outputs.

For boat electrical systems, this is a small but important integration part when adding or servicing Victron lithium battery protection around a MultiPlus. It belongs in a protected electrical area near the BMS and inverter/charger, with wiring kept secure against vibration and away from moisture, heat, and chafe points.

Key features

• Connects a Victron Smart BMS CL 12-100 to compatible MultiPlus inverter/charger models without using VE.Bus control.
• Supports MultiPlus 500VA-1600VA, MultiPlus Compact 800VA-2kVA, and MultiPlus-II installations.
• Lets the BMS control the MultiPlus through the remote on/off connector when battery protection conditions require action.
• Works with the Smart BMS CL 12-100 Load/Charge Disconnect output and the smallBMS Load/Charger output.
• Helps the MultiPlus switch back on and begin charging after a low battery shutdown once the BMS side is reset and AC power is available.
• Useful for marine lithium battery upgrades where the inverter/charger must follow the BMS rather than operate independently.

Installation and setup

The cable is wired to the remote on/off connector of the MultiPlus. On MultiPlus 500VA-1200VA models, the black wire connects to the ON terminal and the red wire connects to the positive terminal. On MultiPlus Compact 800VA-2kVA models, the black wire connects to the middle terminal and the red wire connects to the right IN terminal. On MultiPlus-II models, the black wire connects to the lower negative terminal and the red wire connects to the upper positive remote on/off terminal.

Both the relevant BMS output and the MultiPlus remote input state must be correct for the MultiPlus to operate. After a shutdown caused by low battery voltage, the system can be reset by running the alternator or using a battery charger on the primary side of the BMS. Once reset, the MultiPlus can switch on and start charging when it is connected to an AC power source.

Compatibility and fit

This cable is for Victron systems built around Smart BMS CL 12-100 or smallBMS control and a compatible MultiPlus inverter/charger. It is not a general data cable and should not be treated as a replacement for VE.Bus communication where VE.Bus control is required by the system design.

Before installation, match the MultiPlus model family to the correct remote on/off terminal wiring. This is especially important on refits, where older inverter/chargers, lithium battery upgrades, and existing DC distribution wiring may already be in place.

Use cases on board

This cable is a good match for cruising boats, fishing boats, and compact marine power systems using Victron LiFePO4 Smart Batteries with a Smart BMS CL 12-100 and a compatible MultiPlus. It is most useful when the battery management system needs direct authority over the inverter/charger so battery protection events are handled cleanly.

Because this is a control connection rather than a power cable, careful routing matters. Keep it supported, avoid sharp bends, and install it where the terminals remain accessible for inspection during routine electrical checks.