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SmallBMS NG (NextGen) is an all-in-one Battery Management System (BMS) for Victron Lithium NG batteries (not to be confused with the lithium smart batteries).
SmallBMS NG (NextGen) is an all-in-one Battery Management System (BMS) for Victron Lithium NG batteries (not to be confused with the lithium smart batteries without NG (NextGen)). These batteries are Lithium Iron Phosphate (LiFePO4) and are available in 12.8V, 25.6V, and 51.2V in various capacities. They can be connected in series, parallel, or a combination of both to create battery banks for system voltages of 12V, 24V, or 48V. A maximum of 50 batteries can be used when configuring a bank with 12V or 24V batteries, while up to 25 batteries can be used with 48V batteries. This allows for a maximum energy storage capacity of 192 kWh with 12V batteries, up to 384 kWh with 24V batteries, and 128 kWh with 48V batteries.
The SmallBMS NG is a simple and cost-effective alternative to the VE.Bus BMS NG, but lacks a VE.Bus interface and is therefore not suitable for use with VE.Bus MultiPlus and Quattro inverter/chargers.
Bluetooth Smart:
The SmallBMS NG includes Bluetooth Smart for wireless configuration, monitoring, and software updates via the VictronConnect app. Instant readout displays key data such as SoC, battery temperature, warnings, and alarms directly in the device list without needing to connect.
Load disconnect output:
Controls the remote on/off input of a BatteryProtect, inverter, DCDC converter, or other loads with remote on/off functionality. Due to its maximum output current of 1A, it can also control a high-current relay or a contactor. Please note that a non-inverting or inverting on/off cable may be required, please refer to the manual.
Charge disconnect output:
Controls the remote on/off port for chargers such as the Smart Charger IP43, a Cyrix-Li-Charge relay, a Cyrix-Li-ct Battery Combiner, or a BatteryProtect. Please note that the charge disconnect output is not suitable for powering an inductive load such as a relay coil.
Pre-alarm output:
Triggers a visible or audible warning when battery voltage is low, activated at least 30 seconds before the load disconnect output is deactivated due to cell undervoltage. Can power a relay, LED, or buzzer. Maximum output current: 1A (not short-circuit protected).
Remote on/off terminal:
Enables remote control of the Load and Charge disconnect outputs. When turned off, both outputs become floating, which turns off connected loads and chargers.
LED indicators:
The SmallBMS NG has two LEDs: a blue LED for Bluetooth status and a red LED for warnings and alarm faults.
Configurable discharge limit:
Sets the minimum SoC to prevent excessive discharge while ensuring sufficient energy for self-discharge. A low SoC warning is triggered in VictronConnect, activating the pre-alarm output when the discharge limit is approached. A low SoC alarm is triggered when the discharge limit is reached, and the BMS immediately deactivates the ATD output, effectively turning off all loads it controls.
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