For cascading inverters in a single phase grid connection, for export limitation setting and power control, a CHINT DDSU666-H smart meter (single phase power meter) and S-Dongle device (4G) are required Dongle or WLAN-FE Dongle) .
The smart meter and the S-Dongle must be connected to the same inverter. This inverter will be the master and the rest of the cascaded inverters will be slaves.
1
2.Cascade connection of inverters in three-phase grid connection (balanced three-phase grid connection)
For this scenario, a CHINT DTSU666-H Smart Meter (three-phase power meter) and an S-Dongle device (4G Dongle or WLAN-FE Dongle) are requested.
The Smart Meter and the S-Dongle must be connected to the same inverter. This inverter will be the master and the rest of the cascaded inverters will be slaves.
For both scenarios, the inverters must be cascaded through the RS485 communication protocol on ports 1 and 2 of the communication terminal.
For the inverter where the power meter will be connected, the communication cables of the power meter must be connected in port 3 and 4.
Signal Port Connector and Pin Definition
3
4
All settings must be made on the master inverter. Slave inverters will be automatically configured in batches via the master inverter.
Please note that for the export limitation setup it is mandatory to install the S-Dongle in the master inverter.
