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SmallBMS (BMS400100000) – is a miniature controller (BMS) for Victron Lithium Smart (LiFePO4) batteries, which guarantees reliable basic protection against critical voltage drops, overcharging, and temperature overloads. This device is perfectly suited for building power systems that need high-quality protection of battery cells but do not require complex integration via the VE.Bus protocol. The module is equipped with two separate ports to stop the charging process and disconnect the load, as well as a Pre-Alarm port for early warning.
Main advantages of the SmallBMS controller
- Full compatibility with Victron Lithium Smart batteries at 12.8V and 25.6V
- Ultra-compact form factor (106 × 42 × 23 mm) – allows the module to be placed in confined spaces.
- Two independent control ports– Load Disconnect and Charge Disconnect
- Pre-Alarm function – informs in advance about a critically low energy remainder
- Minimal energy consumption – the optimal solution for use in autonomous energy systems
- Ease of installation– does not require complex setup procedures
Technical features and functions
- Load Disconnect – triggers when the cell voltage drops below an acceptable level, sending a signal to disconnect the inverter or BatteryProtect module.
- Charge Disconnect– stops the charging process as soon as the voltage on at least one cell reaches the maximum limit.
- Pre-Alarm – a signal port that can be used to trigger light or sound indication even before the system is completely de-energized.
- Autonomous operation without VE.Bus – concise and simple control for basic configurations using Victron Lithium Smart.
- Seamless integration with: Smart BatteryProtect, Cyrix-Li-ct, Cyrix-Li-Charge, and other components of the Victron ecosystem.
Communication interfaces
- Load Disconnect (current up to 1 A, voltage up to 60 V) – designed to control inverter equipment, BatteryProtect relays, or directly consumers.
- Charge Disconnect (current up to 1 A, voltage up to 60 V) – serves to stop the operation of charging stations.
- Pre-Alarm (current up to 1 A, voltage up to 60 V) – used to activate early warning systems or start auxiliary equipment.
- Remote on/off – contact for remote power-on and complete shutdown of the power system.
Device application options
- Autonomous solar power plants based on Victron Lithium Smart batteries.
- Power supply systems for transport: campers, motorhomes, marine vessels, mobile laboratories.
- Organization of backup power for telecommunication equipment, server racks, emergency lighting.
- Synchronization with Cyrix and BatteryProtect devices to create a smart energy distribution system.