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7.4 Zero-export func�on (Op�on)
7.4.1 Zero-export func�on via energy meter
The string inverter supports zero-export func�on via Energy meter / SUN-Limiter. 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 can instruct the inverter
to ramp down its ac�ve power according to match the load demand and achieve zero export.
The Zero-export func�on is op�onal. If you buy the inverter with zero-export func�on via
energy meter, energy meter will be included in the package which is necessary for zero-export
func�on.
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 7.9 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.
Pic7.9 CHINT meter
Three-Phase Smart Meter
SET
ESC
1
7
4
10
25
24
3
9
6
10
RS 485
CHNT DTDU666
