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53
For stability, all the batteries need to be connected in parallel. It is recommended that a minimum cable
size is of 50mm diameter with fuse isolators to each inverter.
When connecting inverters in parallel, there are some important points that you must remember:
1) You can only connect the 'GRID' input and 'LOAD' output in parallel.
2) Do not connect the 'AUX/Gen' input in parallel. This input can be used for Aux / Smart Load if required,
but it is generally better not to use.
3) Ensure there is a good communication cable between each inverter and always set the Master Inverter
centrally, as shown in Figure 53.
Figure 53 – Paralleling inverters.
1) All batteries must be in parallel.
2) Inverters operating without batteries are only in Grid Operation, so they do not need to be paralleled in
the same way.
3) You only need one CT coil per master.
4) Only the master can communicate with the battery array. However, suppose you are using more batteries
than the number allowable for the inverter. In that case, the other batteries can be connected to the other
inverters set to voltage only, and therefore there is no need for communication.
5) If the inverters are connected to the communication of the same battery array, the master will control the
charges in the other inverters.
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