Connecting The Bms Or Meter Communication Cable - Goodwe ET Series User Manual

06 Electrical Connection

6.7.3 Connecting the BMS or Meter Communication Cable

For GW15K-ET and GW20K-ET, please connect the cable to BMS1 port to realize BMS
communication. Otherwise, BMS communication may fail.
• The smart meter and CT have been preset parameters before delivered with the inverter.
Do not modify the relevant parameters.
• The BMS communication cable is delivered with the inverter, with default length of 5m.
• Each inverter needs to be connected to one smart meter independently. Do not connect
one smart meter to multiple inverters. Contact the manufacturer or supplier to purchase
additional smart meter(s)if you need.
• Ensure that CT connects with the corresponding phase line: CT1 is connected to L1; CT2 is
connected to L2; and CT3 is connected to L3. And ensure that the CT is connected in the
right direction. Please refer to the smart meter user manual for detailed operations.
• RJ45 connector with the following definition can be connected for BMS and meter
communication:
PIN Color
1 Orange and White
2 Orange
3 Green and White
4 Blue
5 Blue and White
6 Green
7 Brown and White
8 Brown
WARNING
NOTICE
Smart Meter
NC
NC
NC
NC
NC
NC
485_B1
485_A1
40
User Manual V1.0-2022-08-30
BMS1 BMS2
485_A2 485_A4
485_B2 485_B4
NC NC
CANH1 CANH2
CANL1 CANL2
NC NC
NC NC
NC NC