MG Master LV 12V/400A – vue fabricant 1 – MGMLV120400

MG Master LV 12V/400A – vue fabricant 2 – MGMLV120400

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MG ENERGY

MGMLV120400

MG Master LV 12V/400A – MGMLV120400

MG Energy battery controller for 12 V systems, 400 A main contactor, designed to monitor and protect the compatible battery bank.

Retail priceBenefit from the professional rate

757,17€

757,17€ ~~849,12€~~

Shipping calculated at checkout.

Prices shown excluding VAT for Türkiye. If your delivery address is in the European Union, the VAT of the destination country will be added at checkout.

Available in stock

Free pickup point from €150 in France
Pickup at Skysat possible

Custom installation

Trust Skysat to install the equipment on board

Request a quote

Installers near you

thanks to our network of approved installers

Find an installer

Support service

Opt for additional installation assistance

Detailed description

MG Energy battery controller for 12 V systems, 400 A main contactor, responsible for monitoring and protecting the compatible battery bank.

Key features

Centralized monitoring of essential battery bank parameters.
System protection via opening of the safety contactor in case of threshold exceedance.
Active power consumption: 10.3 W.
Manufacturer documentation and 2026 dealer specifications linked to the exact SKU.

Intended use

MG Energy battery system integrators for marine, mobile, and stationary applications.

Compatibility and prerequisites

System voltage range: 12 V.
Contactor capacity: 400 A.
Connectable batteries: 96 battery modules of type MGLFP120210.

Installation and safety

Power wiring, CAN, emergency stop, and precharge must be completed according to the MG Energy manual.
Verify precharge capacity and contactor current relative to loads and inverters.
Commissioning and configuration reserved for qualified integrators.

Supplied contents

One BMS controller matching the indicated SKU.
Official digital documentation.

To be purchased separately

Batteries, CAN cables, and power cables.
Fuses, distribution, external contactors, and installation-specific accessories.
Electrical study, configuration, and commissioning.

Shipping and handling

Declared shipping weight: 5.5 kg.
Configuration product sold on quote; compatibility and lead time confirmed before order.

Environmental

Humidity (non-condensing): ≤ 95 %
Operating temperature range: -20 to +50 °C

Inputs and outputs

Charge enable (relay output): 0.8 A at 60 Vdc, dry contact
Charge enable (switched voltage): Short-circuit protection
Discharge enable (relay output): 0.8 A at 60 Vdc, dry contact
Discharge enable (switched voltage): Short-circuit protection
Auxiliary output: Short-circuit protection
External status signal: Short-circuit protection
Programmable contact (relay output): 0.8 A at 60 Vdc, dry contact

Mechanical specifications

Data connection: CAN Bus RJ45
Housing material: ABS
Height: 117 mm
Ingress protection rating: IP22
Length: 426 mm
Weight: 4.9 kg
Width: 225 mm

Standards and certifications

Certifications: IEC-EN62619 (ES-TRIN)
EMC emissions: EN-IEC 61000-6-3:2007/A1:2011/C11:2012
EMC immunity: EN-IEC 61000-6-1:2007
Low voltage directive: EN 60335-1:2012/AC:2014
RoHS: EN 50581:2012

Technical specifications

Communication: Victron VE.CAN
Main contactor current: 400 A
Maximum number of connected batteries: 96 battery modules of type MGLFP120210
Operating power consumption: 10.3 W
Standby power consumption: 63 mW
Power supply voltage range: 8 - 15 Vdc
System voltage: 12 V

Logistics

HS customs code: 8537109199
Country of origin: Netherlands
Shipping weight: 5.5 kg
Classified as dangerous goods: No

Documentation

Official MG Energy datasheet - MGMLV120400

Integration advice: verify system voltage, currents, protections, cooling, and interfaces of the complete system prior to installation.

Expert opinion

Pol CONIN

Digital Manager

« Expert review — MG Master LV 12V/400A – MGMLV120400 »

The MG Master LV 12V/400A is a centralized battery management system (BMS) designed for 12 V lithium battery banks. Its strategic role is to ensure the safety and longevity of the entire energy system. This controller stands out for its "all-in-one" approach, integrating a main 400 A safety contactor, fuse holders, and internal DC distribution. This consolidation significantly simplifies the architecture of complex systems, reducing the number of external components and simplifying wiring for integrators.

Technically, the Master LV provides comprehensive protection against overcharging, deep discharges, and extreme temperatures by continuously monitoring critical battery parameters. If safety thresholds are exceeded, its internal contactor automatically opens, isolating the battery bank from loads and charging sources. An integrated precharge circuit is also a major advantage, preventing electrical arcs and premature wear of the contactor during switching operations, thereby ensuring long-term reliability.

System integration is simplified by its CAN Bus compatibility, supporting NMEA2000, Victron VE.CAN, and SMA protocols. This advanced communication capability enables automatic system configuration and firmware updates, optimizing compatibility and maintenance. For marine, mobile, or stationary system integrators, the Master LV offers a robust solution capable of managing up to 96 MG LFP120210 battery modules, allowing significant scalability for demanding applications.

It is crucial to note that the Master LV has an IP22 protection rating. This means it must be installed in a dry, protected environment, shielded from direct water splashes and ambient humidity—a key consideration for marine installations. Commissioning and configuration require the intervention of a qualified integrator to ensure compliance and safety of the installation.

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MG Master LV 12V/400A – MGMLV120400

757,17€

757,17€ ~~849,12€~~

Frequently Asked Questions

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What is the primary function of the MG Master LV 12V/400A?

The MG Master LV is a battery management system (BMS) for low-voltage systems. Its primary function is to monitor and protect connected batteries by tracking all critical parameters and ensuring the system remains within a safe operating range.

Does the MG Master LV 12V/400A balance battery cells?

Yes, the MG Master LV battery management system balances the cells across the entire battery installation. This maximizes capacity and extends the battery cells' lifespan.

What is the ingress protection (IP) rating of the MG Master LV housing?

The MG Master LV housing has an IP22 protection rating.

What temperature range can the MG Master LV operate in?

The MG Master LV is designed to operate within a temperature range of -20 to +50 °C.

What is the maximum capacity of the main safety contactor integrated into the MG Master LV?

The main safety switch integrated into the MG Master LV has a capacity of 400 A.

How many battery modules can be connected to the MG Master LV?

The MG Master LV can be connected to a maximum of 96 MGLFP120210 battery modules.

Which data connection types are supported by the MG Master LV?

The MG Master LV supports data connections via:

CAN Bus RJ45 NMEA 2000 SMA Victron VE.CAN

Is the MG Master LV suitable for marine applications?

Yes, the MG Master LV is suitable for marine applications, as well as for mobile and stationary applications, for MG Energy battery system integrators.

Which items are included with the purchase of the MG Master LV?

Purchasing the MG Master LV includes a BMS controller matching the specified SKU and the official digital documentation.

Who is qualified to perform the installation and commissioning of the MG Master LV?

Power wiring, CAN, emergency stop and precharge must be carried out according to the MG Energy manual. Commissioning and configuration are reserved for a qualified integrator.

What are the important checks to perform when installing the MG Master LV?

During installation, it is important to check the preload capacity and contactor current relative to the loads and converters present in the system.

How does the MG Master LV ensure battery system safety?

The MG Master LV ensures safety by continuously monitoring all critical battery parameters. If these parameters exceed a safe operating range, the internal safety contactor automatically opens to disconnect chargers and loads, ensuring safe and reliable operation.

What protections are integrated into the MG Master LV outputs?

The following MG Master LV outputs are equipped with protections:

Charge authorization (switched voltage): Overcurrent and short-circuit protection.Discharge authorization (switched voltage): Overcurrent and short-circuit protection.Auxiliary output: Overcurrent and short-circuit protection.External status signal: Overcurrent and short-circuit protection.

What is the maximum humidity supported by the MG Master LV without condensation?

The MG Master LV can operate in an environment with non-condensing humidity up to 95%.

What is the country of origin of the MG Master LV?

The country of origin for the MG Master LV is the Netherlands.

What is the MG Master LV 12V/400A battery monitor used for?

The MG Master LV 12V/400A is a battery management controller (BMS) designed for low-voltage systems. Its primary function is to protect connected batteries by monitoring all essential parameters.

It collects data and monitors battery status to maintain parameters within a safe operating range. If this range is exceeded, the internal safety contactor automatically opens to disconnect chargers and loads, ensuring safe and reliable operation. It also balances the cells across the entire battery installation, maximizing capacity and extending cell lifespan.

Which batteries are compatible with the MG Master LV 12V/400A?

The MG Master LV 12V/400A is compatible with MGLFP120210-type battery modules. It can manage a maximum of 96 such modules.

Which communication standards are supported by the MG Master LV 12V/400A controller?

The MG Master LV 12V/400A controller supports multiple communication standards for integration into your system:

CAN Bus RJ45 for data connection.NMEA 2000 for marine networks.SMA.Victron VE.CAN.

What is the IP protection rating of the MG Master LV 12V/400A and for which environment is it designed?

The MG Master LV 12V/400A has an IP22 protection rating. This means it is protected against solid objects larger than 12.5 mm and against vertical water droplets when the device is tilted up to 15 degrees.

It is designed for marine, mobile, and stationary applications, but its IP22 rating means it must be installed in an environment protected from direct water and excessive moisture. The operating temperature range is -20 to +50 °C, with non-condensing humidity ≤ 95 %.

What are the installation requirements for the MG Master LV 12V/400A controller?

Installing the MG Master LV 12V/400A controller requires the following components and procedures:

Performing the power wiring, CAN bus, emergency stop, and precharge wiring in accordance with the MG Energy manual. Verifying precharge capacity and contactor current relative to system loads and converters. Commissioning and configuration must be carried out by a qualified integrator. Components to be provided separately include batteries, CAN cables, power cables, fuses, distribution, external contactors, installation-specific accessories, as well as the electrical study and configuration.