Deye SUN-12K-SG01HP3-EU + BYD Battery-Box Premium HVS

Closed-loop compatibility, protocol setting and cabling. Best status: verified closed loop.

Field-sourced data. Verify against the current official manual and firmware before commissioning — a wrong setting can damage equipment.

CAN Verified closed-loop confidence: high

Protocol: BYD CAN
Inverter setting: Batt Mode = Lithium; Lithium Mode = BYD HVS setup number from Deye's Approved Battery List; BMS1/BMS2 pin4=CAN-H, pin5=CAN-L; HVS 2–5 (single tower per Deye list)
Battery / DIP: BYD BMU CAN → Deye BMS1 (pin4/5); route the RJ45 through the supplied ferrite (4 turns)

BYD BMU ↔ Deye BMS1 (RJ45 CAN cable, pins 4/5)

CAN, pins 4/5

Deye lists BYD HVS as single-tower (2–5) — verify before any parallel tower.

Code	Cause	Fix
F58 Battery_comm_Lose	Inverter↔BMS comms lost while BMS_Err-Stop is active	Check the CAN cable/pins; verify the Lithium Mode code
F56 BAT1_VoltLow_Fault	Battery terminal voltage low	Check the battery; restart the inverter; restore factory settings if needed

Get the right parts

As an affiliate we may earn a commission from qualifying purchases, at no extra cost to you. This does not affect the compatibility data above.