Victron smallBMS NG: Advanced Battery Management for Victron Smart LiFePO₄ Systems

Compact, Reliable Protection for 12V, 24V, and 48V Lithium Setups

The Victron smallBMS NG is a next-generation battery management system engineered to safeguard Victron Smart LiFePO₄ batteries with M8 circular connectors. This compact unit delivers essential cell-level monitoring and control, preventing damage from over-voltage, under-voltage, and temperature extremes. Unlike generic BMS solutions, the smallBMS NG integrates directly with Victron’s ecosystem, ensuring precise communication and reliable operation in mobile, marine, and off-grid applications.

Designed for 12V, 24V, and 48V systems, it operates across a wide 8–70V DC range, making it suitable for diverse installations. The unit draws minimal current—as low as 1.2 mA in remote-off or low-cell-voltage states—reducing parasitic drain on your battery bank.

Key Features

• Load Disconnect Output: Normally high (Vbat – 0.1V), sources up to 1A to drive external relays or contactors, protecting against deep discharge.
• Pre-Alarm Warning: Provides a 30-second early alert before load disconnect, allowing time for graceful system shutdown or generator start.
• Charge Disconnect Output: Normally high, sources up to 500mA to control compatible chargers or Cyrix-Li relays, preventing over-charge and over-temperature conditions.
• Remote On/Off Control: Flexible input via Remote L/H terminals for external switching, enabling integration with system-level controls.
• LED Status Indicators: Blue 'Load ON' and red 'Temp or OVP' LEDs provide at-a-glance system status without additional monitoring tools.
• Compact, Durable Enclosure: ABS matt black housing (106 x 42 x 23 mm, 0.1 kg) with IP20 rating, suitable for protected indoor installations.

Why Choose the smallBMS NG?

This BMS is purpose-built for Victron Smart LiFePO₄ batteries, eliminating compatibility risks associated with generic battery management systems. It ensures your lithium investment is protected by precise, factory-matched thresholds. The pre-alarm feature reduces the risk of unexpected system shutdowns, while the charge disconnect output prevents charger-induced damage. With its low power consumption and robust signal outputs, the smallBMS NG is ideal for caravans, marine vessels, and remote off-grid systems where reliability is critical.

Note: This unit does not include a VE.Bus interface and is not intended for direct control of VE.Bus inverter/chargers such as MultiPlus or Quattro. For those applications, consider the Victron VE.Bus BMS.

Ready to Protect Your Lithium Battery Bank?

Integrate the Victron smallBMS NG into your energy system today for dependable, automated battery protection. Whether you're upgrading an existing setup or building a new off-grid solution, this BMS provides the essential safeguards to maximise battery lifespan and performance.