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55
7.1. SINGLE-PHASE CONFIGURATION
In theory, you can connect up to 16 inverters on a single-phase configuration, but be very careful about
the inrush current when switching on. You may need to add an additional contactor.
The single-phase configuration only requires one master, and all the others are slaves. In addition, keep
the communication cable as short as possible.
1) Check if all inverters have the same operating system and the latest software version and are the same
model.
2) On the multi-inverter page, select 'parallel' and choose the master, which is normally the central inverter.
3) Ensure that you have good quality communication cable between the inverters.
4) Set all the other inverters to be slaves.
5) Each inverter needs its own unique MODBUS number.
6) Each inverter needs its own data logger.
7) You only need one CT coil, which is connected to the master.
8) All batteries are wired in parallel.
9) The master is the only one that communicates with the battery BMS.
After checking and setting all this, you are good to go. As previously mentioned, the most common fault
is a communication error between the inverters. Please study the previous Section 7 of this training manual.
Figure 55 - Sunsynk inverters paralleled.
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