Victron smallBMS for LiFePO4 Battery Systems | BMS400100000

The Victron Energy smallBMS is a compact battery management system built for Victron LiFePO4 lithium batteries. It protects against over-charge, over-discharge and excessive discharge current, which suits small off-grid systems, marine installs and mobile setups where space and weight matter.

Key features

• Protection, over-charge and over-discharge protection for Victron LiFePO4 lithium batteries.
• Load disconnect output, signals connected devices to cut the load before cell damage occurs at low state of charge.
• Charge disconnect output, signals chargers to stop once the battery is fully charged, preventing over-voltage.
• Weight, 80 g, suited to space-constrained installations.
• Wiring, simple interface, less complex to install than a full-featured BMS.

Product overview

The smallBMS monitors cell voltages in a Victron LiFePO4 battery and acts through two outputs, load disconnect and charge disconnect. It is intended for smaller systems that don't need a full BMS with CAN-bus communication. It works alongside Victron components such as BatteryProtect and compatible MPPT solar charge controllers. It does not provide active cell balancing or communication to a GX device, so check compatibility with your specific battery model before installing.

Applications

• Small off-grid solar systems using Victron lithium batteries.
• Marine and narrowboat 12V or 24V lithium battery installations.
• Campervans, motorhomes and other mobile power setups.
• Portable power stations and lightweight energy storage builds.
• Backup power systems needing a compact BMS solution.

Installation notes

Use the smallBMS only with compatible Victron LiFePO4 batteries. It is not suitable for lead-acid, AGM or gel chemistries. Wiring should be done by a qualified electrician familiar with lithium battery systems, since incorrect wiring of the disconnect outputs can damage the battery or cause system failure. Refer to Victron's wiring schematics for your specific battery and system before commissioning.

What's in the box

• 1 x Victron Energy smallBMS (BMS400100000)