Pytes E-BOX Series User Manual page 12

Warning: Batteries connected in series are forbidden, high voltage would lead to hazard shock.
2)Power cable connection instructions of multi-Rack:
Connect the overall power cables of each rack to the convergence bus bar (or junction box) in parallel,
then connect to the energy storage inverter.
The length, thickness, material, and resistance of the cables connected in parallel must be the same.
Note: When the cable is inserted into the positive and negative terminals of the battery and you hear a "Click" sound, the
cable is firmly connected. Before pulling out the cable, press the small button next to the terminal. When multiple batteries
are connected in parallel, in order to reduce the influence of the circular current, the overall positive and negative output
cables can be connected from different batteries to a Bus-Bar.
5.4.4 Connecting communication cables
Single battery: Choose port to be inserted according to the communication protocol (RS485/-
CAN/RS232) between the battery and ESS inverter, then insert the communication cables to the port;
Multiple batteries: The host and the slave communicate in cascade mode: one is the host and the rest
are the slaves. Please refer to the following picture for the cascade connection. User needs to insert
communication cables to relevant link ports between batteries and be aware that:
1.The host Link Port 0 must be kept free;
2.The end slave Link Port 1 must be kept free;
Note: The system may not be able to communicate if not followed the instruction.
5.4.5 Procedure of starting/Shut down the whole system
How to start and shut down the whole system correctly
Figure 5-1 Schematic diagram of battery connection
Note: The battery must be placed in a locked cabinet or room,
and a 5cm cooling gap is reserved when installing the battery,
and the battery cabinet should have a load capacity of more
than 100kg
Link Port 0
Host
Link Port 1
Link Port 0
Slave
Link Port 1
Link Port 0
Slave
Link Port 1
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Must be vacant