GRNbms Devices – Smart BMS for LV and HV Battery Systems

Key Features

Supports 190–1500V DC high-voltage systems
Integrated precharge, battery+ and battery− relay control
Three independent CAN buses up to 1 Mbit/s
Multiple auxiliary outputs: 3×12V, 1×5V (Current-monitored & short-circuit-proof)
RJ45 Victron port, Ethernet, RS485, 2×USB
Display interface (e.g. Nextion), monitored PWM fan output
Advanced isolation monitoring inputs (HV+, HV−, battery housing)
Up to 5 external temp/humidity sensor ports
Embedded quad-core ARM processor with 512MB RAM
Supports thrird party CMUs e.g. VAG MEB
Supports up to 2160 Cells
CE certified for compliance with European safety and quality standards

Specification	Details
Dimensions	230 × 128 mm
Primary Power Supply	400–1500V DC
Secondary Supply	10–14V DC
Relay Outputs	3× 12V (Batt+, Batt−, Precharge)
CAN Interfaces	3× CAN (up to 1 Mbit/s)
Auxiliary Outputs	3× 12V, 1× 5V
E-Stop Input	1× NC (normally closed)
Victron Interface	1× RJ45
Network	1× Ethernet (LAN + Master/Slave BMS)
USB Ports	2× USB (e.g. Wi-Fi sticks)
RS485	For Modbus (e.g. inverter, smart meter)
Display	Compatible with Nextion displays
Fan Output	12V PWM with RPM monitoring
Isolation Monitoring	HV input/output & case sensing
Temp/Humidity Inputs	5× external sensor ports
Processor Specs	Quad-core ARM @ 1.2GHz, 512MB RAM

Supports 190–1500V DC high-voltage systems
Integrated precharge, battery+ and battery− relay control
Three independent CAN buses up to 1 Mbit/s
Multiple auxiliary outputs: 3×12V, 1×5V (Current-monitored & short-circuit-proof)
RJ45 Victron port, Ethernet, RS485, 2×USB
Display interface (e.g. Nextion), monitored PWM fan output
Advanced isolation monitoring inputs (HV+, HV−, battery housing)
Up to 5 external temp/humidity sensor ports
Embedded quad-core ARM processor with 512MB RAM
8 digital inputs for relay monitoring (dry contacts)
Dedicated STO output for inverter interlock
Supports thrird party CMUs e.g. VAG MEB
Supports up to 2160 Cells
CE certified for compliance with European safety and quality standards

Specification	Details
Dimensions	230 × 128 mm
Primary Power Supply	400–1500V DC
Secondary Supply	10–14V DC
Relay Outputs	3× 12V (Batt+, Batt−, Precharge)
Additional Inputs	8× digital (relay contact feedback)
STO Output	1× 12V logic output for inverter disable
CAN Interfaces	3× CAN (up to 1 Mbit/s)
Auxiliary Outputs	3× 12V, 1× 5V
E-Stop Input	1× NC (normally closed)
Victron Interface	1× RJ45
Network	1× Ethernet (LAN + Master/Slave BMS)
USB Ports	2× USB (e.g. Wi-Fi sticks)
RS485	For Modbus (e.g. inverter, smart meter)
Display	Compatible with Nextion displays
Fan Output	12V PWM with RPM monitoring
Isolation Monitoring	HV input/output & case sensing
Temp/Humidity Inputs	5× external sensor ports
Processor Specs	Quad-core ARM @ 1.2GHz, 512MB RAM

Ultra compact 113 × 61 mm
Integrated precharge and battery+ relay control
Three independent CAN buses up to 1 Mbit/s
Multiple auxiliary outputs: 3×12V, 1×5V (Current-monitored & short-circuit-proof)
RJ45 Victron port, Ethernet, RS485, 2×USB, RJ45 GRNcmu Port, RS232
Display interface (e.g. Nextion), monitored PWM fan output
External temp/humidity sensor port
Embedded quad-core ARM processor with 512MB RAM
Supports thrird party CMUs e.g. VAG MEB
Supports up to 2160 Cells
CE certified for compliance with European safety and quality standards

Specification	Details
Dimensions	113 × 61 mm
Primary Power Supply	10–14V DC
Relay Outputs	2× 12V (Batt+, Precharge)
CAN Interfaces	3× CAN (up to 1 Mbit/s)
Auxiliary Outputs	3× 12V, 1× 5V
E-Stop Input	1× NC (normally closed)
Victron Interface	1× RJ45
GRNcmu Interface	1× RJ45
Network	1× Ethernet (LAN + Master/Slave BMS)
USB Ports	2× USB (e.g. Wi-Fi sticks)
RS485	For Modbus (e.g. inverter, smart meter)
RS232	For VE-Direct (e.g. Current-Sensor)
Display	Compatible with Nextion displays
Fan Output	12V PWM with RPM monitoring
Temp/Humidity Inputs	1× external sensor ports
Processor Specs	Quad-core ARM @ 1.2GHz, 512MB RAM