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Victron miniBMS /smallBMS NG

Protects 12V/24V/48V LiFePO₄ Batteries with M8 Connectors


Regular price $130.90
$151.80
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Top-down view of Victron smallBMS NG showing status LEDs and connection terminal labels

Victron miniBMS /smallBMS NG

DESCRIPTION

Victron smallBMS NG: Advanced Battery Management for Victron Smart LiFePO₄ Systems

Compact, Reliable Protection for 12V, 24V, and 48V Lithium Setups

The Victron smallBMS NG is a next-generation battery management system engineered to safeguard Victron Smart LiFePO₄ batteries with M8 circular connectors. This compact unit delivers essential cell-level monitoring and control, preventing damage from over-voltage, under-voltage, and temperature extremes. Unlike generic BMS solutions, the smallBMS NG integrates directly with Victron’s ecosystem, ensuring precise communication and reliable operation in mobile, marine, and off-grid applications.

Designed for 12V, 24V, and 48V systems, it operates across a wide 8–70V DC range, making it suitable for diverse installations. The unit draws minimal current—as low as 1.2 mA in remote-off or low-cell-voltage states—reducing parasitic drain on your battery bank.

Key Features

  • Load Disconnect Output: Normally high (Vbat – 0.1V), sources up to 1A to drive external relays or contactors, protecting against deep discharge.
  • Pre-Alarm Warning: Provides a 30-second early alert before load disconnect, allowing time for graceful system shutdown or generator start.
  • Charge Disconnect Output: Normally high, sources up to 500mA to control compatible chargers or Cyrix-Li relays, preventing over-charge and over-temperature conditions.
  • Remote On/Off Control: Flexible input via Remote L/H terminals for external switching, enabling integration with system-level controls.
  • LED Status Indicators: Blue 'Load ON' and red 'Temp or OVP' LEDs provide at-a-glance system status without additional monitoring tools.
  • Compact, Durable Enclosure: ABS matt black housing (106 x 42 x 23 mm, 0.1 kg) with IP20 rating, suitable for protected indoor installations.

Why Choose the smallBMS NG?

This BMS is purpose-built for Victron Smart LiFePO₄ batteries, eliminating compatibility risks associated with generic battery management systems. It ensures your lithium investment is protected by precise, factory-matched thresholds. The pre-alarm feature reduces the risk of unexpected system shutdowns, while the charge disconnect output prevents charger-induced damage. With its low power consumption and robust signal outputs, the smallBMS NG is ideal for caravans, marine vessels, and remote off-grid systems where reliability is critical.

Note: This unit does not include a VE.Bus interface and is not intended for direct control of VE.Bus inverter/chargers such as MultiPlus or Quattro. For those applications, consider the Victron VE.Bus BMS.

Ready to Protect Your Lithium Battery Bank?

Integrate the Victron smallBMS NG into your energy system today for dependable, automated battery protection. Whether you're upgrading an existing setup or building a new off-grid solution, this BMS provides the essential safeguards to maximise battery lifespan and performance.

SPECIFICATIONS

Product smallBMS NG
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 3mA (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 max current: 1 A (not short circuit protected)
Sink current: 0 A (output free floating)
Charge disconnect output Normally high (Vbat – 0.1 V)
Source max current: 500 mA (not 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: Remote L and Remote H 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
Model #: BMS400100300
MPN: BMS400100300

WARRANTY

Victron Energy Limited Warranty Policy

Direct Customers

Victron Energy provides the following warranty to any direct customer (OEM, distributor or dealer) in relation to any products that Victron Energy has directly sold to the direct customer. This warranty is not an end-user warranty between Victron Energy and an end-user, and end-users shall not have any rights or remedies under this limited warranty towards Victron Energy directly. The direct customer shall, in turn, ensure that the end-user is provided with a warranty identical to this warranty, subject to applicable local mandatory law.

End-Users

Victron Energy may also provide a warranty directly to end-users, in which case the below warranty conditions equally apply to such warranty. In that case, end-users shall claim their warranty at their place of purchase or through the original direct customer of Victron, which can be found through the support section on Victron’s website https://www.victronenergy.com/support. Hence, the direct customer shall on behalf of Victron Energy deal with any warranty claims made under any warranty that Victron Energy may provide directly to end-users. This support section on Victron’s website https://www.victronenergy.com/support will provide further guidance on the procedure for end-users to make a claim under this limited warranty.

If the end-user is a consumer – a natural person who is acting for purposes which are outside that person's trade, business, craft or profession – the following applies. The rights and remedies granted to the consumer under this limited warranty are without prejudice to the consumer’s statutory rights. Furthermore, the consumer is entitled by law to remedies from the seller free of charge in the event of a lack of conformity of the goods (such as repair, replacement, price reduction or rescission), which remedies are not affected by this limited warranty.

Warranty

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 original 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 original end-user, with a maximum of 30 months from the Victron Energy invoice date, Lithium batteries: 3 years from date of purchase by the original end-user, with a maximum of 42 months from the Victron Energy invoice date. In addition to this, proof of correct battery usage is required when making a battery warranty claim.

For a 10% surcharge on the current net price for products that came with a 5-year warranty, an additional 5 years of warranty can be purchased by Victron’s direct customers, bringing the total warranty to 10 years. Warranty extensions need to be applied for ultimately one year before the expiration of the original term. Victron may ask proof that the product was still functional at the time of purchase of the extended warranty.

During the warranty period, Victron Energy will, at its discretion, repair, replace or (partly) credit 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:

  • Reversed battery polarity.
  • Inadequate connection.
  • Mechanical shock or deformation.
  • Contact with liquid or oxidation by condensation.
  • Use in an inappropriate environment (dust, corrosive vapour, humidity, high temperature, biological infestation, etc.).
  • Breakage or damage due to lightning.
  • Connection terminals and screws destroyed or other damages, like overheating, due to insufficient tightening.
  • For any electronic breakage except due to lightning (reverse polarity, over‐voltage due to external cause), the state of the internal control diode and/or the input/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 other than Victron Energy or one of its authorized Repair Centres. In order to qualify for the warranty, the product must not be disassembled or modified.

This warranty and our warranty obligations thereunder (repair, replacement or credit) are the direct customer’s and, if applicable, the end-user’s sole rights and remedies and our sole obligations with respect to any defective and/or non-conforming product or breach of warranty and is subject to and without prejudice to the limitations of liability in this warranty.

Victron Energy shall not be liable for damages, whether direct, incidental, special, or consequential, even caused by negligence or fault.

As a product requires service, it must be brought back to the place of purchase. In case no contact can be made with the merchant, or if he is either unable or not allowed to provide service, direct contact should be made with Victron Energy through the support section on Victron’s website.

In case Victron Energy replaces a product, it will own the replaced product. Victron Energy owns all parts removed from repaired products. Victron Energy uses new or reconditioned parts made by various manufacturers when performing warranty repairs or building replacement products.

If Victron Energy repairs or replaces a part of a product, its warranty term is not extended: the warranty will apply for the remaining term of the original warranty term. For example, if Victron Energy replaces a product with a 5-year warranty after 3 years, the warranty of this product will apply for another 2 years, with a minimum of 6 months.

All remedies and the measure for damages are limited to the above. Victron Energy shall in no event be liable for consequential, incidental, contingent or special damages, even if having been advised of the probability of such damages.

The foregoing limited warranty provided by Victron Energy is in lieu of any other warranties, express or implied arising by law, course of dealing, course of performance, usage of trade or otherwise, of any kind whatsoever including, without limitation, warranties of merchantability or fitness for a particular purpose, with respect to any product. The above is without prejudice to the arrangement for consumers detailed above.

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 Victron Energy's product can be reasonably expected to cause the 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.

Warranty on repairs for products outside their warranty period

The warranty period on products that are outside their warranty period and have been repaired by Victron Energy or one of the Victron Energy Repair centres is six (6) months from delivery. The same applies to spare parts and circuit boards that have been supplied or repaired by Victron Energy.

Transport

It is the responsibility of the sender to sufficiently package these products. The transport must be organized in a way to avoid any damage, especially when a single unit or heavy unit is sent.

Severability

If a part of the terms and conditions of this warranty is held invalid, void or unenforceable due to any particular national or international legislation, it shall not affect other parts of the terms and conditions of this warranty.

Applicable law

This warranty is exclusively governed by the laws of the Netherlands, to the exclusion of the UN Convention on Contracts for the International Sale of Goods.

Contact details

Victron Energy B.V. | De Paal 35, 1351 JG Almere, The Netherlands | https://www.victronenergy.com/support

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