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The inverter has external zero export func�on. This func�on is op�onal. It can collect counter-
current power to control the output power of the inverter, so that the power of inverter and
load can be offset, and the excess power will not be fed back to the grid. If you purchase the
inverter with zero export func�on, an external zero export device ( SUN limiter or energy meter)
will be included in the package which is necessary for the func�on. The SUN limiter shows as
Pic 7.1. You can see corresponding line mark next to the green interface. The green terminals
on the le� are the interface of three-phase AC line (L1, L2, L3) and N Line (N), and the the right
are the interface between three sets of current sensor and one set of control terminals. SUN limiter
will collect voltage and current from these interfaces and send control signals to the inverter.
7 Zero export func�on via SUN limiter
7.1 SUN Limiter func�on wiring diagram
L1
L1(L)L1(K)L2(L)L2(K)L3(L)L3(K)
+ -
L2
L3
N
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Pic 7.1 SUN Limiter view
When you are reading this, we believe that you have completed the connec�on according to the
requirements of chapter 5, if you has been running your inverter , and you want to use the limiter
func�on, please turn off AC and DC switch of the inverter, and wait for 5 minutes un�l the inverter
completely discharged.In order to make it easier for you to use the limiter func�on, we have
specifically given the wiring diagram, as shown in Picture 7.2, the yellow/green/red live line
(L1,L2,L3) connected to the u�lity grid live line (U/V/W), blue line means the neutral line.
