Smart BMS 12/200

The Smart BMS 12/200 is an all-in-one battery management system (BMS) designed for Victron Lithium Battery Smart 12.8 V batteries. It combines current limiting, battery combiner, and battery protection functions, ensuring the protection of lithium batteries and the alternator in 12 V systems for vehicles and boats.

This BMS is specifically designed for use with Victron Lithium Battery Smart 12.8 V batteries. It supports systems of up to 20 batteries, enabling a maximum energy storage of 84 kWh in a 12 V system.

The Smart BMS 12/200 protects the alternator by electronically limiting the input current on the Alternator/Starter+Battery port to approximately 90% of the fuse rating. For example, a 100 A fuse will limit the input current to about 90 A, preventing the alternator from overloading and overheating if it operates at full power for an extended period.

The System+ port of the Smart BMS 12/200 can handle a maximum continuous current of 200 A, both for charging and discharging. It is designed to connect DC loads, additional chargers, or battery chargers/converters.

Yes, the Smart BMS 12/200 ensures a unidirectional current flow from the alternator to the lithium battery. No current can flow back from the lithium battery to the starter battery, which protects the starter battery from excessive discharge.

The Smart BMS 12/200 monitors each individual cell of the battery and will disconnect the alternator, charging sources, or DC loads in case of low or high cell voltage, or excessive temperature. It also regulates excessive input voltages and transients to a safe level.

The remote on/off terminal can be used to interrupt charging via the Alternator port and/or charge/discharge via the System+ port while keeping BMS functions active. It can also serve as an on/off switch to completely shut down the system, depending on the configuration via the VictronConnect app.

The load-disconnect output is used to remotely control the on/off input of a BatteryProtect, inverter, converter, or other loads. Normally high (Vbat – 0.1 V), it goes floating when cell undervoltage is imminent (default 2.8 V, adjustable in the battery).

The load-disconnect output controls the remote on/off port of a charger (such as the Phoenix Smart Charger IP43, a Cyrix-Li-Charge, or a BatteryProtect). Normally high (Vbat – 0.1 V), it becomes floating in case of imminent cell overvoltage or excessive temperature. It is not suitable for inductive loads.

Yes, the Smart BMS 12/200 includes Bluetooth for monitoring and configuration via the VictronConnect app. It also features Instant Readout, which allows reading key values in real time without requiring a paired connection.

The Smart BMS 12/200 can operate within a temperature range from -40 °C to +60 °C.

The Smart BMS 12/200 has an IP65 protection rating, meaning it is protected against dust and low-pressure water jets from all directions.

The dimensions of the Smart BMS 12/200 are 65 mm (height) x 120 mm (width) x 340 mm (depth).

The Smart BMS 12/200 weighs 2 kg.

Main DC power connections use M8 terminals, requiring a tightening torque of 10 Nm.

The box contains:

Smart BMS 12/200
A ground wire with 10 mm eye terminal
A 2-pin plug with pre-installed wire loop
A 3-pin plug for charge/discharge disconnections and pre-alarm
A pre-installed Megafuse 200 A fuse
An ATO fuse holder with 2 x 7.5 A fuses

Yes, the System+ port can be used as a load output, allowing direct connection of DC loads to this port. It supports a maximum continuous current of 200 A.

Charging via the System+ port is interrupted when the battery charge limit is reached or if there is a risk of cell undervoltage/overvoltage or excessive temperature. Charging will resume when the battery voltage is 0.5 V below the charge limit for 10 consecutive seconds.

Yes, you must install either a switch between the L and H terminals of the remote on/off terminal, or the wire loop (default) for correct operation. Alternatively, terminal H can be switched to the battery positive, or terminal L to the battery negative.

Victron Energy’s Smart BMS 12-200 is designed to provide comprehensive protection for your 12 V system, particularly for lithium batteries and the alternator. Its protection functions include:

Alternator protection: It electronically limits the input current on the « Alternator/Starter Battery+ » port to approximately 90 % of the fuse rating. This protects the alternator from overload and overheating, even when operating at full power for extended periods.
Lithium battery protection: The BMS safeguards the lithium battery against excessive charging currents. It monitors each individual cell in the battery and disconnects charging sources or DC loads if cell voltage is too low or too high, or if temperature is elevated, to prevent damage.
Starter battery protection: The system ensures a unidirectional current flow from the alternator to the lithium battery, preventing the lithium battery from discharging into the starter battery and protecting the latter from excessive discharge.
Intelligent disconnection management: If low/high cell voltage or elevated temperature is detected, the BMS can disconnect the alternator, charging sources, or DC loads to ensure battery safety and longevity.