The VE.Bus BMS NG is a Battery Management System (BMS) for Lithium NG batteries from Victron Energy (not to be confused with Lithium Battery Smart batteries without NG). These batteries are based on Lithium Iron Phosphate (LiFePo4) and are available in 12.8 V, 25.6 V, and 51.2 V in several capacity options. They can be connected in series, parallel, or a combination of both to create battery banks for system voltages of 12 V, 24 V, or 48 V.
A maximum of 50 batteries can be used when configuring a bank with 12 V or 24 V batteries, while up to 25 batteries can be used with 48 V batteries. This allows for a maximum energy storage capacity of 192 kWh with 12 V batteries, up to 384 kWh with 24 V batteries, and 128 kWh with 48 V batteries. For more detailed information on these batteries, please refer to the product page for Victron's Lithium NG batteries.
The VE.Bus BMS NG is designed to interact with and protect Victron Lithium NG batteries in systems that include a Victron inverter/charger 1) or VE.Bus inverters 1). It relies on this connection to perform important functions such as enabling/disabling charging and discharging based on battery conditions.
Based on the status of the Lithium NG battery, the BMS will:
- Generate a pre-alarm to warn of an impending cell undervoltage
- Disable inverting in VE.Bus inverters or inverter/chargers via VE.Bus, and disconnect other loads via the "load disconnect" terminal in the event of a cell undervoltage.
- Disable charging in VE.Bus inverters or inverter/chargers via VE.Bus, disable VE.Direct and VE.Can solar chargers via a GX device, and disconnect other chargers via the "charge disconnect" terminal in the event of a cell undervoltage, under- or overtemperature.
Features:
- Bluetooth Smart: The VE.Bus BMS NG includes Bluetooth Smart for wireless configuration, monitoring, and firmware updates via the VictronConnect app. Instant readings show important 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, DC-DC converter, or other loads with the remote on/off function. Due to its maximum output current of 1 A, it can even control a high-current relay or contactor. 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 input of chargers such as the Smart Charger IP43, a Cyrix-Li-Charge relay, a Cyrix-Li-ct battery combiner, or a BatteryProtect. Note that the Charge Disconnect (CHARGER) output is not suitable for driving an inductive load, such as a relay coil.
- Pre-alarm output: Triggers a visible or audible warning when the battery voltage is low, which activates at least 30 seconds before the load disconnect output is disabled due to cell undervoltage. Can drive a relay, an LED, or a buzzer. Maximum output current: 1 A (not short-circuit protected).
- Remote on/off terminal: Allows remote control of load and charge disconnect outputs. When off, both outputs float freely, turning off connected loads and chargers.
- LED indicators: The VE.Bus BMS NG has three LEDs: a blue LED for Bluetooth status, a red LED for warnings and alarm faults, and a VE.Bus status LED.
- Communication with VE.Bus products: MultiPlus, Quattro, or inverters are connected to the "MultiPlus/Quattro" port with a standard RJ45 UTP cable. The BMS disables inverting in the event of a cell undervoltage and disables charging in the event of a cell overvoltage or temperature situation.
- Communication with remote devices: A GX device (such as a Cerbo GX), Digital Multi Control panel (DMC), or a VE.Bus Smart dongle (including all combinations) can be connected to the BMS via the "Remote Panel" port. These accessories can all be used together with the BMS to remotely control the VE.Bus inverter's or inverter/charger's switch mode (on/off/charger only).
- Terminals for extra power input and output: The BMS has a dedicated power output terminal (GX power) for a GX device and an extra power input terminal (Aux-in)..
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