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10.2 Parallel Communication Cable Connection
For parallel communication, CAT 5 cables are needed. When using common batteries, BMS cable needs to
be connected to the master unit. The inverter shares the BMS information by inter-unit parallel
communication cable.
10.3 Parallel Operation Notes
1) Make sure all the units in parallel are with the same software version. USER->INQUIRE->FIRMWARE
2) Please check the diagram above. The common battery use is supported by default for maximizing the
system efficiency. The BMS cable should be connected to the master inverter.
3) Connect the loads of the two inverters together first. It should be noted that the grid power line and
the load line of the two inverters should be roughly the same length.
4) Make sure the CT Limiter sensor is installed properly. If the load is connected outside the inverter, user
need to choose a common CT and make sure the CT ratio is right (the default 90A CT ratio is 1:1000, no
need to change). The common CT is only needed to be connected to the master inverter. Please install CT
on every unit's incoming electrical service wire on L1 and L2(see diagram) when choosing independent
CT.
5) Please check the master and slave setting by screen and make sure all the setting are same.
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