Goodwe ET Series User Manual page 15

2.4.4 SMART METER AND CT
Make sure you have everything voltage-free before connecting the smart meter and CT [6]
The measuring module Smart Meter with CT is included in the package and must be connected to the ET
inverter. The measuring module detects the direction and magnitude of power and current and controls the
operation of the inverter via RS485 communication.
NOTE:
1. Smart Meter and CT are pre-set, do not change any settings on Smart Meter;
2. One Smart Meter and CT can only be used for one ET inverter;
3. Three CTs must be connected to one Smart Meter and must be connected to the same phase to which the
Smart Meter is connected.
Smart Meter and CT connection
To Smart Meter
NOTE:
1. Use the Smart Meter and 3x CT that comes with the inverter;
2. CT cable is 3m long, and can be extended to max. 5m;
3. The communication cable for the Smart Meter (RJ45) is connected to the inverter ("To Smart Meter" cable),
this cable can be extended to a maximum of 100m, and the data cable and RJ45 plug must be used as shown
below:
LED indication of the Smart Meter
Does not shine
Power Turned off
Energy /
COM Flickers when there's communication going on
Power meter
PIN Color
1 Orange-white
2 Orange
3 Green-white
4 Blue
5 Blue-white
6 Green
7 Brown-white
8 Brown
Shines Flickers
Turned on /
Takes Gives
Grid
Appliances
BMS function Smart Meter function
485_A2 NC
NC NC
485_B2 485_B1
CAN_H NC
CAN_L NC
NC 485_A1
NC 485_B1
NC 485_A1
CT A is connected to L1
CT B is connected to L2
CT C is connected to L3
RS485
485_A
485_B
485_A
NC
NC
485_B
NC
NC