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20
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7. Zero-export func�on via energy meter
There're two kinds of energy meters for this series inverter. First type is Eastron
SDM630-Modbus V2 which is able to measure the Max. 100A current directly. More details
please refer to Pic 7.1 & 7.2. For the Eastron SDM630 MCT 40mA, it needs external CT to
measure the current. The CT power range is from 5A-2000A. More details about the Eastron
SDM630 MCT, please refer to Pic 7.3 & 7.4. Also, the CHNT meter DTSU666 is supported, it can
measure the Max. 80A current directly. More details about the DTSU666, please refer to Pic
7.5 & 7.6.
When you are reading this, we believe that you have completed the connec�on according to
the requirements of chapter 5, if you have been running your inverter at this �me, and you
want to use the zero-export func�on, please turn off AC and DC switch of the inverter, and
wait for 5 minutes un�l the inverter completely discharged.Please follow below Picture 7.1
to connect the energy meter.
For system wiring diagram, the red line refers to L line (L1, L2, L3), the black line refers to the
neutral line (N). Connec�ng energy meter RS485 cable to inverter's RS485 port. It's recom-
mended to install an AC switch between the inverter and the u�lity grid, the specs of the AC
switch are determined by the power of load.
If there is no integrated DC switch inside the inverter you purchased, we commend you to
connect the DC switch. The voltage and current of the switch depend on the PV array you
access.
