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SUNSYNK MAX | User Manual
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.
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.
Connect a RJ45 communication cable between each inverter; the order is not important
since both sockets are the same, so there is no IN or OUT.
Each phase must only have one master and the others set to slave.
Each inverter must have a unique Modbus number.
The maximum length of the communication cables is 2 meters (do not exceed this value)
All batteries must be connected in parallel and the MPPTs must be kept separate.
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.
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.
Only once confirmed all inverters are programmed correctly in parallel or three-phase then
only the isolating 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.
When configuring a three-phase system using three single-phase inverters, one per phase.
It is extremely important to check phase rotation to be clockwise feeding the inverters and
to confirm the output is also clockwise on phase rotation.
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.
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 out-
puts is isolated from each other.
The grid input can also be connected in parallel.
You cannot connect the Aux/Gen port in parallel, because this causes a conflict
between the frequency of the generator and the frequency of the grid.
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