- 20 -
Output
RS 485
GND
Input
Pic 7.1 EASTRON meter
EASTRON SDM230
1
230V/2T
5 6 7 8 9 10
2
3
A B
4
GND
1
+CO
M 2
+
5
3
6
7
GND
A B
L
N
L
N
1
2 4
7.1 Zero-export func�on (Op�on)
7. Zero-export func�on (Op�onal)
7.1.1 Zero-export func�on via energy meter
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 (L), the blue line refers to the neutral
line (N), green line refers to ground wire (PE). Connec�ng energy meter RS485 cable to
inverter's RS485 port. It's recommended 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.
The AC switch we recommend to connect to the inverter output can refer to Table 7.2. 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.
The string inverter supports zero-export func�on via Energy meter / Limiter(CT) . Based on
con�nuously data communica�on, once the Limiter or energy meter detects power export to
the grid, it will send the informa�on to the inverter and then inverter will ramp down its ac�ve
power according to match the load demand and achieve zero export. This limiter func�on is
op�onal. If you buy the inverter with zero-export func�on (CT), a current sensor will be
included in the package which is necessary for zero-export func�on.
If you buy the inverter with zero-export func�on via energy meter, an energy meter will be
included in the package which is necessary for zero-export func�on.
System connec�on diagram for the Eastron meter
