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SmallBMS NG (BMS400100300) from the Victron Energy brand – is an advanced control system for Victron Lithium NG (New Generation) series battery cells. The device features a miniature design, a built-in Bluetooth module, and an early warning function for critical discharge. This is an excellent choice for organizing independent power systems that require reliable communication with inverter equipment, chargers, and secure blocking of deep discharge or overcharge. The controller is compatible with 12.8V, 25.6V, and 51.2V batteries, allowing the formation of battery banks with a capacity of up to 192 kWh.
Main advantages of the SmallBMS NG controller
- Ease of integration – the best option for interacting with the Lithium NG battery model range from Victron.
- Miniature dimensions – the device size is only 106×42×23 mm, which allows it to be installed in any available space.
- Bluetooth Smart communication – remote monitoring, parameter control, and downloading new software versions via the VictronConnect app.
- High energy efficiency – current consumption in operating mode does not exceed 3 mA.
- Discharge warning system – the signal triggers 30 seconds before the automatic disconnection of energy consumers.
- Absolute compatibility with peripherals – seamless operation with Cyrix-Li-ct, Cyrix-Li-Charge, Smart BatteryProtect, and other proprietary equipment.
Technical and functional capabilities
- Charging and discharging process management – independent outputs for communication with BatteryProtect, inverters, and charging stations.
- Configurable minimum state of charge (SOC) threshold – protects the battery from destructive deep discharge, significantly extending its operational life.
- Connecting indication means and relays – the Pre-alarm port allows the use of light and sound annunciators.
- Interaction with generators – function of automatic start and stop of the generator by control signal.
- Remote control – Remote on/off outputs are designed to organize a single power management center.
- LED indication on the body – presence of a blue LED (Bluetooth status) and a red one (active alarm).
Communication interfaces
- Bluetooth Smart – parameter configuration and status tracking directly from a mobile device.
- Load Disconnect – signal to disconnect inverter equipment, BatteryProtect modules, and DC-DC converters.
- Charge Disconnect – signal to stop chargers (e.g., Blue Smart, Skylla) and Cyrix.
- Pre-Alarm Output – trigger to activate an external audio or visual alarm.
- Remote on/off – general button for remote power-on or de-energization.
Application areas
- Autonomous photovoltaic stations based on Victron lithium iron phosphate batteries.
- Backup power supply complexes with the function of automatic load shedding.
- Mobile energy systems on transport (cars, yachts, vans), where stable BMS operation is critically important.
- Industrial facilities requiring strict monitoring of charge/discharge cycles and the presence of an alarm system.