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GRN Storage Systems

Original GRNbms MK2 battery management system

Original GRNbms MK2 battery management system

Normaler Preis €700,00 EUR
Normaler Preis Verkaufspreis €700,00 EUR
Sale Ausverkauft
Touch Screen

First aftermarket battery management system for re-use with VAG MEB battery platform, as found in BEV like VW ID.series, Skoda Enyaq, Audi eTRON and Cupra Born

List of compatible Inverter protocols:

  • Inverters certified for the Pylontech Low voltage/high voltage protocol
  • Inverters certified to work with BYD HV protocol
  • Victron Energy LV
  • Victron Energy HV protocol for the upcoming Multi HS19 Solar
  • Deye Inverter- all generations HV + LV
  • Fronius GEN24 / Plus
  • Sofar Solar HV + LV
  • Goodwe HV + LV
  • and many more

*HV= high voltage
*LV= low voltage


List of compatible Cell Management Units / Batteries :

  • VAG MEB 12S CMU full control and balancing, from 1-32 modules
  • VAG MEB 8S CMU full control and balancing, from 4-36 modules
  • VAG MEB 12S & 8S with GRNcmu MEB – 2 Port and 4 Port variant - 2- 100 modules per can
  • BMW i3 CMU full control and balancing – 1-32 modules
  • BMW i8 CMU full control and balancing – 1-36 modules
  • Flexible open port cell management with GRNcmu 18S active balancer
  • Flexible open port cell management with GRNcmu multi passive balancer


Supported current sensors
  • LEM CAB500 model CAB-SF 500-C/SP1-000
  • LEM CAB300 model
  • Victron SmartShunt 500 and Victron BMV-712 Smart (VE.Direkt to GRNbms extension required)


  •  High End PCB design with Powerful Dual Core Processor 
  •  Connect your GRNbms via Wi-Fi or Ethernet 
  •  System integration via MODBUS TCP/IP - RTU and MQTT
  •  Integrated RS485 gateway – MODBUS RTU to TCP/IP
  • Take control with your Apple, Android or any other device who runs a web browser with the GRN Web interface
  •  Online firmware updates for all GRN products (offline also possible)
  •  Support a wide range of HV & LV Inverter
  •  Support all GRN extension ecosystem
  •  Support current sensors for HV or LV use
  •  Check all your system values by optional touchscreen display
  •  All lithium chemistries
  •  no limits on battery pack design
  •  Support for low and high voltage systems
  •  Onboard main and pre-charge control
  •  GRN watchdog algorism take care of your configuration
  • 2,4" Nextion touch screen to monitor and control a lot of functions
  •  Benefit from the GRN product family and start your project

Technical Specs

Absolut maximum ratings:

Input Voltage 9 – 14 Vdc
Input Current: 550mAh
Temperature Range: -20°C - +80°C
Output Current 5V: 1A max.
CAN Bus: ±80V fault protection
RS485: -0.3V to 7V


Size (W x H x D): 148mm x 57mm x 25mm

CAN Bus: 3x CAN V2.0B up to 1 Mbps
RJ45 (Victron - compatible BMS CAN) - bridged to Can1
RS485: 32 Transceivers @ Bus up to 2.5Mbps
Relay Outputs: 1 Main Relay, 1 Pre-charge Relay
Ethernet: 10/100, IEEE802.3/802.3u, ISO 802-3/IEEE 802.3
Wi-Fi: 802.11 b/g/n up to 150 Mbps Access Point & Station Mode
Display: Connector for RS232 compatible Displays up to 2Mbps


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