Pair of 2 meters battery cables for connection to the solar inverter, includes communication cable.
With this pair of 35mm2 cables that are rated for the current of the Pylontech batteries you will make the right connection from the energy storage bank to the inverter/charger.
Each battery unit includes the interlink battery cables for parallel connection to another battery, whereas this pack is for connecting to the inverter/charger.
You require one cable pack per system, with a maximum of 5 batteries. With a system of more than 5 batteries, an additional cable pack would be required.