The Victron VE.Bus BMS NG is a battery management system for Victron lithium battery banks connected via the VE.Bus interface. It handles cell protection, charge control and system coordination for lithium installations in off-grid, marine and mobile setups. This unit is the next-generation replacement for the original VE.Bus BMS and is the version recommended for current Victron lithium installations.

Key features

• Interface, connects via VE.Bus to coordinate with compatible Victron inverters, inverter/chargers and chargers.
• Cell protection, signals connected devices to stop charging or discharging when battery limits are reached.
• Hardware-level protection, operates independently of any GX device or monitoring software.
• Weight, 0.217 kg, suitable for compact installations in marine, vehicle and off-grid enclosures.
• System integration, works alongside Venus OS devices for monitoring and control.
• Pre-alarm output, allows a controlled shutdown before hard protection limits are triggered.

Product overview

The VE.Bus BMS NG sits between the Victron lithium battery bank and the VE.Bus-connected inverter or inverter/charger, protecting cells from overcharge, over-discharge and excessive temperature. When a cell approaches its limit, the BMS sends a signal over VE.Bus telling the connected device to reduce or stop charging or discharging.

The NG designation means this unit supersedes the original VE.Bus BMS and is the currently supported version for new installations. Confirm compatibility with your specific battery model and firmware before fitting it. It does not replace a battery's own integrated BMS where one exists; it acts as the system-level coordinator on VE.Bus-based setups.

Applications

• Off-grid solar systems using Victron MultiPlus or Quattro inverter/chargers with Victron lithium batteries.
• Marine installations needing cell-level protection and VE.Bus integration.
• Vehicle and motorhome builds with Victron lithium battery banks on VE.Bus-connected chargers.
• Replacing legacy VE.Bus BMS units in existing Victron lithium systems.
• Systems monitored via Venus OS GX devices requiring BMS status visibility.

What's in the box

• 1 x Victron VE.Bus BMS NG unit

Installation notes

Fitting should be carried out by a qualified electrician or experienced Victron installer familiar with lithium battery systems and VE.Bus architecture. Check battery and firmware compatibility beforehand. This unit is not suitable for non-Victron batteries or batteries with their own integrated BMS that does not use the VE.Bus BMS protocol.