The GRNbms MK3 supports both High Voltage (HV) and Low Voltage (LV) operation.

• Connect 12 V to the „Jump Start“ connector
• This powers the BMS directly for low-voltage applications or setup/configuration

• For high-voltage setups, connect the BMS using the dedicated HV connectors

HV POS Connector:

• B+ → Connect directly to Battery Positive
• O+ → Output (post-relay) – not required for power supply

HV NEG Connector:

• B- → Connect directly to Battery Negative
• O- → Output (post-relay) – not required for power supply

✅ To power the BMS: only B+ and B- are needed

⚠️ Valid voltage range: 150 V – 1200 V DC Operating the BMS outside this range may cause malfunction or damage.

Additionally, for safety and EMI compliance:

• Connect the battery chassis to the E pin on the CHASSIS connector
• Use a dual connection if possible for redundancy

👉 Details about relay and output wiring can be found here

Schritt 2