1. How to set the parallel mode of SHxxRT three-phase hybrid inverters
First, connect the system power line and communication line as shown in the following figure. In addition, please pay attention to the following matters:
The following schematic shows how to connect the communication cables between the energy meter and the master and slave inverter daisy chain.
Master HYB1:
o A1B1 RS485 to other inverter.
o A2B2 for the smart meter
o LG Chem battery is not supported.
Slave HYB2:
o A2B2 RS485 to other inverter.
o A1B1 for LG Chem Battery
The following is an example of how the parameters must be set in a system with a maximum of 5 hybrid inverters at a PV power of 50 kWp and a 70% feed-in limitation (note that in Germany a maximum of 3 inverters may be connected in parallel according to PAV, E-monitoring, 70% limitation according to 5.7.4.2, symmetry device according to VDE-AR-N 4100, 5.5):
Master parameter setting
Slave 1 parameter setting
If the master inverter fails or the RS 485 communication is faulty, the following procedure is recommended:
o All slave inverters will fail.
o Deactivate the parameter Parallel connection of several gensets in all inverters. If dynamic feed-in limitation is activated, it should also be deactivated in the parameters, since the smart meter (counter) is now no longer connected to the slave inverters.
If one of the slave inverters fails or the RS 485 communication is faulty, the following procedure is recommended:
o The master inverter will fail.
o Deactivate the parameter Parallel connection of several gensets in all inverters. If a dynamic feed-in limitation is activated, this should also be deactivated in the parameters, as the smart meter (counter) is now no longer connected to the slave inverters.
For further information, please download the user manual here.
This manual is intended for professional technicians who are responsible for installation, operation, maintenance and troubleshooting of inverters, and users who need to check inverter parameters. The inverter must only be installed by professional technicians.
The professional technician is required to meet the following requirements:
Know electronic, electrical wiring and mechanical expertise, and be familiar with electrical and mechanical schematics.
Have received professional training related to the installation, commissioning and troubleshooting of electrical equipment.
Be able to quickly respond to hazards or emergencies that occur during installation, commissioning and troubleshooting.
Be familiar with local standards and relevant safety regulations of electrical systems.
Read this manual thoroughly and understand the safety instructions related to operations.