GRNbms MK3 Low Voltage Battery Management System (LVBMS)

GRNbms MK3 Mini – Compact LV Battery Management (Optimized for Victron Energy)

Ultra Compact. Fully Integrated. Powered by GRN-OS.

The GRNbms MK3 Mini is an advanced, ultra-compact Battery Management System specifically designed for low-voltage battery configurations such as 48V systems, fully optimized for seamless integration with Victron Energy products. Running on our proprietary GRN-OS (built on a secure and robust Linux kernel), the MK3 Mini ensures stable, fast, and reliable performance in all energy management tasks. Its ultra-compact design (113 × 61 mm) makes it the perfect solution for DIY storage systems, solar installations, and standalone off-grid projects.

🔋 Key Features:

• Ultra Compact Footprint – Just 113 × 61 mm, ideal for space-limited installations.

• Powered by GRN-OS – Proprietary operating system built on a secure Linux kernel for stability, speed, and reliability.

• Best-in-Class Performance with GRNcmu: Safest and most efficient performance when used with GRNcmu modules for full control, diagnostic capability, balancing, and system protection.

• Integrated Relay Control – Built-in control of Battery+ and precharge relays ensures simplified setup.

• Optimized for Victron Energy – Dedicated RJ45 Victron port allows plug-and-play integration with Victron GX devices.

• Three Independent CAN Buses – Flexible integration (up to 1 Mbit/s) into complex system architectures.

• Multiple Protected Outputs – Three 12V and one 5V auxiliary outputs (current-monitored, short-circuit protected).

• Comprehensive Connectivity – Ethernet, RS485 (Modbus), RS232 (VE-Direct), dual USB, RJ45 GRNcmu port.

• Advanced Display & Fan Control – Supports Nextion displays, PWM fan control with RPM monitoring.

• Environmental Monitoring – External sensor input for precise temperature and humidity tracking.

• Quad-Core ARM Processor – Reliable quad-core performance (1.2 GHz, 512 MB RAM).

• Third-party CMU Compatibility – Supports OEM CMUs including VAG MEB modules (1-12S).

• Fully Certified – CE-certified, meets European quality and safety standards.

  
  

  🌐 GRNlive – Cloud Monitoring & Remote Access for GRNbms

  With GRNlive, we offer a professional cloud-based platform for real-time monitoring and remote access to your GRNbms system — perfect for managing your energy system on the go, performing data analysis, or granting team access. Seamlessly integrated with your BMS, GRNlive provides live dashboards, historical insights, and secure device control.

  🔗 Learn more or get started at:
  grnbms.de/start

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  🚀 Key Features of GRNlive

  • Live Dashboard:
    View cell voltages, pack voltage, temperatures, relay states, and more — all in real time.

  • Data Logging & Analytics:
    Access historical charts and performance trends over days, weeks, or months.

  • Device & User Management:
    Control multiple systems, manage users, and assign access permissions — all remotely.

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  ✅ Why GRNlive is the Perfect Companion

  • Remote Monitoring Anywhere:
    Stay informed from your phone, tablet, or PC — at home or in the field.

  • Complete System Insight:
    Track every detail from cell voltages to relay switching status.

  • Team Collaboration:
    Securely share system access with installers, engineers, or co-owners.

  • Fully Integrated with GRN-OS:
    Works natively with all GRNbms platforms — no third-party hardware required.

   

⚙️ Technical Specifications: