Pylontech Extra 2000 Product Manual page 22

Extra 2000 Lithium Iron Phosphate Battery Backup Manual
Note:

Confirm the positive and negative of switching power supply before connecting,
the red power wire to positive and black one to negative;

Before connecting, verify the charging parameters of interface switching power
supply battery. Voltage and current should satisfy charging parameters in Table
2-6 Battery.
4 Cascade Communication Interface
If using a single station battery, please skip this step and proceed to step 5;
When using more than one battery, please continue with this step. (If not using the
net management, this step is not required)
To check network management information of all batteries through one battery,
please parallel each battery through RS485 interface. UTP̶ Unshielded Twisted
Pair (line order: 568b) is used to connect two batteries of the RS485 interface.
When there are more than two, the junction box is used to parallel each interface.
After cascading, ADD switches is used for each battery sequentially assigned
address code starting from 1, the ADD switches using refer to the on slip 5 "ADD
switch" in manual "2.1.2 Equipment Front Panel".
Figure 3-6 Cascading of Multiple Batteries in Parallel Network Schematic
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