SunSynk SUNSYNK MAX, User Manual

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MAX | User Manual 54
For stability, all the batteries need to be connected in parallel. It is recommended a minimum cable size of
50mm
2
diameter with fuse isolators to each inverter.
Each invert will require a fuse isolator with surge protection and each group circuit will require an RCD. If
the batteries as supplying power to the main load during the outage then a change over switch will also be
required or a split load can be used.
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The CT coils used to limit export power must only be connected to the master. Therefore, if six inverters
are paralleled, three CT coils will be required.
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Connect a RJ45 communication cable between each inverter; the order is not important since both sock -
ets are the same, so there is no IN or OUT.
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Each phase must only have one master and the others set to slave.
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Each inverter must have a unique Modbus number.
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The maximum length of the communication cables is 2 meters (do not exceed this value)
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All batteries must be connected in parallel and the MPPTs must be kept separate.
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IMPORTANT: When configuring inverters in parallel for a single or three-phase, it is important to
first check firmware versions to be all the same on all inverters. It is strongly recommended to
request firmware update on all inverters to the latest and the exact same firmware version.
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IMPORTANT: All inverters in a parallel system must have their own isolating load breaker before
it goes to the parallel breaker to ensure while programming that the load outputs are isolated
from each other.
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Only once confirmed all inverters are programmed correctly in parallel or three-phase then only the iso-
lating breakers can be switched on, which then feeds to the main load output breaker where the actual
parallel or three-phase connection is made that feeds the loads.
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When configuring a three-phase system using three single-phase inverters, one per phase. It is extreme-
ly important to check phase rotation to be clockwise feeding the inverters and to confirm the output is
also clockwise on phase rotation.
PLEASE NOTE
The cables have two ends, one to be specifically connected to the BMS and the another one to be
connected to the inverter, do not change it. If the communication is not working correctly between
inverters then errors will show up on the display. In this case, please check all settings and data cable.
PLEASE NOTE
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All inverters in a parallel system must have its own isolating load breaker before it goes to the
parallel breaker to ensure while programming that the load outputs is isolated from each other.
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The grid input can also be connected in parallel.
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You cannot connect the Aux/Gen port in parallel, because this causes a conflict between the fre-
quency of the generator and the frequency of the grid.