Victron miniBMS /smallBMS NG
Victron smallBMS NG: Smart Battery Management for Lithium NG Batteries
The Victron smallBMS NG (Next Generation), also known as the miniBMS, is a dedicated, all-in-one Battery Management System (BMS) designed specifically for Victron Lithium NG LiFePO4 batteries. It offers a streamlined and cost-effective solution for managing and protecting your NG battery bank, serving as a simpler alternative to the VE.Bus BMS NG.
Important Note: This BMS is exclusively compatible with Victron Lithium NG batteries (available in 12.8V, 25.6V, 51.2V) and is NOT compatible with Victron Lithium Smart batteries (those without 'NG' in the name).
Key Features and Benefits:
- Bluetooth Smart Enabled: Wirelessly configure settings, monitor essential battery data (SoC, temperature, warnings, alarms), and perform firmware updates using the convenient VictronConnect App. Includes 'Instant Readout' for key data visibility directly in the device list without needing a full connection.
- Load Disconnect Output: Protects the battery from damaging deep discharge. Controls the remote on/off input of compatible loads such as a Victron BatteryProtect, non-VE.Bus inverters, DC-DC converters, or other devices with remote switching capabilities. Its 1A output can drive high-current relays or contactors (Note: specific non-inverting or inverting cables may be required - consult the manual).
- Charge Disconnect Output: Prevents battery overcharging by controlling the remote on/off port of compatible chargers (e.g., Victron Smart Charger IP43), a Cyrix-Li-Charge relay, Cyrix-Li-ct Battery Combiner, or a BatteryProtect used for charging control. (Note: This output is not designed for directly powering inductive loads like relay coils).
- Pre-Alarm Function: Provides an early warning signal (via a dedicated output) when battery voltage is becoming low, activating at least 30 seconds *before* the Load Disconnect output is triggered. Ideal for activating visual alarms (LEDs), audible alerts (buzzers), or triggering external relays (Max 1A output, not short-circuit protected).
- Remote On/Off Terminal: Allows the smallBMS NG, including its Load and Charge disconnect functions, to be switched on or off remotely. When switched off, both outputs become free-floating, turning off connected loads and chargers.
- Configurable State of Charge (SoC) Discharge Floor: Set a minimum SoC percentage to prevent excessive battery discharge while ensuring enough reserve for self-discharge. Approaching this floor triggers a warning in VictronConnect and activates the pre-alarm output. Reaching the floor triggers an alarm and immediate deactivation of the load disconnect output.
- Clear LED Indicators: Provides instant visual status checks with a blue LED for Bluetooth status and a red LED for system warnings and alarm conditions.
System Compatibility & Configuration:
- Supported Batteries: Exclusively for Victron Lithium NG (LiFePO4) series batteries (12.8V, 25.6V, 51.2V).
- System Voltages: Suitable for building 12V, 24V, or 48V battery banks.
- Bank Configuration: Batteries can be connected in series, parallel, or a combination of both.
- Maximum Bank Size:
- 12V Systems: Up to 50 batteries (approx. 192 kWh max energy)
- 24V Systems: Up to 50 batteries (approx. 384 kWh max energy)
- 48V Systems: Up to 25 batteries (approx. 128 kWh max energy)
- (For comprehensive battery details, please refer to the official Victron Lithium NG battery product page).
Important Limitations:
The smallBMS NG is designed as a cost-effective BMS solution. It does not feature a VE.Bus communication port. Consequently, it is NOT suitable for systems incorporating VE.Bus MultiPlus or Quattro inverter/chargers, as these devices require a VE.Bus enabled BMS (like the VE.Bus BMS NG) for proper integration and control.
Potential Applications:
The Victron smallBMS NG is ideal for various applications where robust Lithium NG battery management is required *without* the need for VE.Bus integration:
- Off-Grid Solar Systems: Powering cabins, sheds, or remote installations using standalone solar chargers (MPPTs) and non-VE.Bus inverters or DC loads.
- Marine & Boating: Managing house battery banks on vessels using Victron Lithium NG batteries.
- Recreational Vehicles (RVs) & Caravans: Providing essential protection and monitoring for auxiliary battery systems.
- Backup Power Systems: Simple UPS or backup systems with compatible chargers and loads.
- Industrial DC Systems: Powering remote monitoring equipment or other DC systems within its voltage and compatibility range.
- Cost-Sensitive Projects: Installations requiring reliable LiFePO4 battery protection and Bluetooth monitoring without the added cost or complexity of VE.Bus components.
- Any 12V, 24V, or 48V System: Utilizing Victron Lithium NG batteries where primary control is managed via remote on/off signals rather than VE.Bus communication.
Next Steps & Further Information:
Ready to integrate the smallBMS NG into your system or need more technical details? Call or email our helpful team to discuss your project!
Visit Victron's Official Small BMS NG Webpage for More Details
(BMS400100300)
Specifications
Product | Victron miniBMS /smallBMS NG BMS400100300 |
Operating voltage (Vbat) | 8 – 70 VDC |
Power supply cable and fuse (not supplied) | Recommended fuse size 0.3 A - 2.5 A, dependent on devices connected to Load disconnect and pre-alarm output |
Current consumption, remote on | 3 mA (excluding Load and Charge disconnect output current) |
Current consumption, low cell voltage | 1.2 mA |
Current consumption, remote off | 1.2 mA |
Load disconnect output | Normally high (Vbat – 0.1 V) Source current limit: 1A (not short circuit protected) Sink current: 0A (output free floating) |
Charge disconnect output | Normally high (Vbat –0.1 V) Source current limit: 500mA (short circuit protected) Sink current: 0A (output free floating) |
Pre-alarm output | Normally free-floating (low) In case of alarm: output voltage Vbat -0.1 V Maximum output current: 500 mA (not short circuit protected) |
Remote on/off | Use modes: 1. ON when the L and H terminal are interconnected 2. ON when the L terminal is pulled to battery minus (V < 3.5 V) 3. ON when the H terminal is high (2.9V < VH < Vbat) 4. OFF in all other conditions |
GENERAL | |
Operating temperature range | -20 to +50 °C (0 – 120 °F) |
Humidity | Max. 95 % (non-condensing) |
Protection grade | IP20 |
ENCLOSURE | |
Material and colour | ABS, matt black |
Weight | 0.1 kg |
Dimensions (h x w x d) | 106 x 42 x 23 mm |
STANDARDS | |
Safety | EN 60950 |
Emission | EN 61000-6-3, EN 55014-1 |
Immunity | EN 61000-6-2, EN 61000-6-1, EN 55014-2 |
Automotive | Regulation UN/ECE-R10 Rev.4 - pending |
SKU | VIC-BMS400100300 |
Barcode # | 8719076063537 |
MPN # | BMS400100300 |
About Victron Energy Markets
Automotive
The automotive market comprises a broad range of applications requiring a reliable power supply. In vehicles such as fire engines, ambulances and police cars a human life may depend on an autonomous system. So it is vital that all systems function flawlessly. Victron Energy offers you such an answer. We are proud to offer you our modern translation for freedom and independence. Energy. Anytime. Anywhere.
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The presence of a functional electricity grid is not always as obvious as it would seem to be. An insufficient infrastructure is often the cause for an unreliable grid. Things become even more difficult when there is no grid at all. And yet you are in need of a reliable electricity supply. A local and properly functioning system is the only answer at this point. Victron Energy offers you such an answer. We are proud to offer you our modern translation for freedom and independence. Energy, Anytime, Anywhere
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Marine
Whether you’re going on a short fishing trip or planning to sail across the ocean, you’ll need reliable power to enjoy your adventure to the fullest. But at Victron we believe reliability isn’t enough. We believe in Optimal Energy instead. In our view, a boat needs an intelligent power grid that adapts to any challenges you may encounter. With unparalleled reliability, without effort and at great value for money. That’s what we call Optimal Energy.
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Energy Storage
As more solar and wind power comes on line, it becomes increasingly difficult and expensive, to ensure stability of the grid. Intermediate energy storage is therefore rapidly becoming an essential tool to keep power fluctuations on the grid within manageable limits. Moreover, as feed-in tariffs are decreasing, the business case for a home energy storage system that increases self-consumption becomes more solid every day. Intermediate energy storage increases self-consumption of harvested solar and/or wind power. The natural next step is 100% self-consumption and independence from the grid.
Read Victron's Off-Grid and Backup Brochure
Read the Victron Wiring Guide - Wiring Unlimited
Download the VictronConnect App Here
Helpful Victron Videos
Did You Know - Choosing the right MPPT for your solar by using our calculator
How to not blow up your Alternator when charging a Lithium Battery with a DC-DC Charger
Victron Energy Limited Warranty Policy
Victron Energy warrants its products to be free from defects in workmanship and materials for a period of 5 years from the date of purchase by the end user, with a maximum of 66 months from the Victron Energy invoice date. Exceptions on this are: lead acid batteries; 2 years from date of purchase by the end user, with a maximum of 30 months from the Victron Energy invoice date, Lithium-ion batteries; 3 years from date of purchase by the end user. In addition to this proof of correct battery usage is required when making a battery warranty claim.
During this period, Victron Energy will, at its option, repair or replace the defective product free of charge. The warranty does not include performing or reimbursing de‐installation, transportation and re‐installation. This warranty will be considered void if the unit has suffered any physical damage or alteration, either internally or externally, and does not cover damages arising from improper use like:
• Reverse of battery polarity.
• Inadequate connection.
• Mechanical shock or deformation.
• Contact with liquid or oxidation by condensation.
• Use in inappropriate environment (dust, corrosive vapor, humidity, high temperature, biological infestation...).
• Breakage or damage due to lightning.
• Connection terminals and screws destroyed or other damages, like overheat, due to insufficient tightening.
• For any electronical breakage except due to lightning (reverse polarity, over‐voltage due to external cause), the state ofthe internal control diode and of the inputs/output X and Y capacitors determine the warranty.
This warranty will not apply where the product has been misused, neglected, improperly installed, or repaired by anyone else than Victron Energy or one of its authorized Qualified Service Partners. In order to qualify for the warranty, the product must not be disassembled or modified.
Repair or replacement are our sole remedies and Victron Energy shall not be liable for damages, whether direct, incidental,special, or consequential, even caused by negligence or fault.
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Life Support Policy
As a general policy, Victron Energy, does not recommend the use of any of its products in life support applications where failure or malfunction of the Victron Energy's product can be reasonably expected to cause failure of the life support device or to significantly affect its safety or effectiveness. Victron Energy does not recommend the use of any of its products in direct patient care. Victron Energy will not knowingly sell its products for use in such applications unless it receives in writing assurances satisfactory to Victron Energy that the risks of injury or damage have been minimized, the customer assumes all such risks, and the Liability of Victron Energy is adequately protected under the circumstances.
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The warranty period on products or on printed circuits boards repaired by Victron Energy as well as on printed circuit boards for replacement is 6 months from delivery by Victron Energy.
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For Australia only
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