Victron smallBMS NG - BMS400100300

Victron Energy smallBMS NG – Smart Bluetooth BMS for Lithium NG Batteries (BMS400100300)

The smallBMS NG is a streamlined and intelligent Battery Management System for Victron's Lithium NG battery line. Unlike earlier smallBMS models, this version includes Bluetooth Smart connectivity for wireless configuration, monitoring, and firmware updates via the VictronConnect app. It offers critical protections for voltage, temperature, and state-of-charge conditions, and is ideal for applications that do not require VE.Bus integration with inverter/chargers.

Main Features

• Compatible with Victron Lithium NG batteries (12.8V, 25.6V, 51.2V)
• Bluetooth Smart: Wireless diagnostics, firmware updates, and settings via VictronConnect
• Discharge floor configuration with low SoC alarm and auto load shutoff
• Pre-alarm output triggers visual/audio warning at low voltage or SoC
• Load and Charge Disconnect outputs for controlling external devices
• Remote On/Off control via digital input (L/H terminals)
• Compact, reliable, and cost-effective BMS alternative

Electrical Specifications

Remote Control Modes

• ON when L and H terminals are shorted
• ON when L is pulled to battery minus (V < 3.5 V)
• ON when H is high (2.9 V < VH < Vbat)
• OFF in all other conditions

Mechanical and Environmental

System Capacity

• Supports up to 50 batteries at 12V/24V (max. 384 kWh)
• Supports up to 25 batteries at 48V (max. 128 kWh)

Certifications

• Safety: EN 60950
• EMC: EN 61000-6-3, EN 55014-1
• Immunity: EN 61000-6-2, EN 61000-6-1, EN 55014-2
• Automotive: UN/ECE-R10 Rev.4 (pending)

Application Examples

Perfect for Victron NG battery systems in RVs, boats, and off-grid power installations where centralized inverter/charger control isn’t needed. The smallBMS NG integrates well with SmartSolar chargers, BatteryProtect, DC-DC converters, and Cyrix-Li relays to offer complete, modular lithium energy systems with Bluetooth-based control.