The Victron VE.Bus BMS V2 is a battery management system for use with Victron LiFePO4 smart batteries. It monitors and protects the battery bank by controlling charge and discharge through the VE.Bus interface, and is intended for professional installation in off-grid, marine and vehicle power systems.

Key features of the Victron VE.Bus BMS

• VE.Bus interface, connects directly to Victron LiFePO4 smart batteries for cell-level monitoring and protection.
• Charge control, controls connected Victron inverters, inverter/chargers and solar chargers to prevent overcharge and over-discharge.
• V2 revision, improved compatibility and functionality over the original VE.Bus BMS.
• Pre-alarm output, signals the system before a hard battery disconnect occurs.
• Weight, 0.18 kg.
• System integration, works with Victron GX devices for monitoring and control.

How it works

The unit reads cell voltage and temperature data directly from the batteries and uses this to instruct connected inverter/chargers and MPPT solar chargers to adjust or stop charging and discharging. This protects battery cells from conditions that reduce cycle life or cause permanent damage. The V2 revision is the current recommended unit for new installations and supports the pre-alarm function, giving the system time for a controlled shutdown before a hard disconnect. It communicates with GX devices such as the Cerbo GX for system visibility through the VRM portal or a local display. It must be used as part of a correctly specified Victron system with compatible LiFePO4 smart batteries, not as a standalone unit.

Applications

• Off-grid solar systems with Victron LiFePO4 smart batteries and MultiPlus or Quattro inverter/chargers.
• Marine electrical systems needing cell-level protection and controlled shutdown behaviour.
• Vehicle and motorhome installations with Victron lithium battery banks.
• Backup power systems where battery protection is a requirement.

What's in the box

• 1 x Victron VE.Bus BMS V2 unit

Installation notes

Installation should be carried out by a qualified electrician or experienced Victron installer. The unit is designed exclusively for Victron LiFePO4 smart batteries and is not compatible with other battery chemistries or third-party batteries. Correct wiring of the pre-alarm and load disconnect outputs is essential for safe operation under fault conditions. Check the Victron system design guidelines to confirm compatibility with your inverter/charger and solar charger models before fitting.