EG4 MPPT100-48HV Manuale d'uso - Pagina 8

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Setting for lithium battery with communication

Caution:

When the charger and inverter are communicating to the battery system simultaneously, the system may

be unstable. It is best to connect the BMS of the battery to the inverter and disconnect the MPPT charger

communication. Then let the charger work without communication in user-defined mode.

Lithium Battery Connection

If you are using an EG4 lithium battery for the MPPT charger, you can use the preconfigured lithium battery

protocol. The EG4 battery has RS485 connections to connect to the BMS port of the charger.

Please follow the steps below to implement lithium battery communication:

1. Locate your included RS485 BMS communication cable.

2. Connect the end of RS485 port of battery to BMS (RS485) communication port of charger.

3. Finish setting program 07 as LI.

4. If communication between the charger and battery is successful, the charger will work normally.

The charger RS485 port pin assignment is shown below:

number

RS485 Port

PIN1

RS485-B

PIN2

RS485-A

PIN3

GND

PIN4

GND

PIN5

Fault Reference Codes

Fault Code

Fault Event

Bus soft start failed

PV voltage is too high

Over temperature of DCDC module

PV current offset is too high

Bus voltage is too high

Battery voltage is too high

Battery current offset is too high

Lithium battery communication is abnormal

Wire color

Red

White

Green

Yellow