7 Electrical Connection
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7 Electrical Connection
7.1 Safety
Danger
Danger to life due to lethal voltages in the inverter!
Before performing any work on the inverter, must disconnect both AC and DC sides.
Warning
Damage to electronic components may happen due to electrostatic discharge. Take appropriate ESD
precautions when replacing and installing the inverter.
Note: Testing for multiple phase combinations as per AS/NZS 4777.2:2020 Section 5 has not been conducted.
7.2 Recommended Cables
Cable Name
Cable Type
Conductor Cross-Sectional Area
Outer Diameter
DC input cable
PV cable, above 600V.
4~6mm
2
5.5~7.4mm
AC output cable
Three cores outdoor cable with
copper conductor (L, N, PE)
4~6mm
2
10~14mm
PE cable
Single core outdoor cable with
copper conductor.
4~6mm
2
N/A
Note: No cable is supplied.
7.3 Meter / CT Connection (Optional)
The inverter has integrated export limitation functionality. To use this function, a power meter or a CT must be
installed.
For installation and operation methods, see Appendix part of meter and CT installation guides.
7.4 Wiring PE Cable
To achieve ground protection purpose, the inverter must be connected to the AC grounding conductor of the utility
grid via PE cable.
Warning
Because of the transformerless design, the DC positive pole and DC negative pole of PV arrays
cannot do grounding.
Note: The PE point at the AC output point is used only as a PE equipotential point, and cannot substitute for the PE
point on the enclosure.
Procedure steps:
1) Insert the grounding conductor into the suitable terminal lug and crimp the contact.
2) Fix terminal lug on external ground point by screw M4x10. Torque: 1.4 N.m.
FIG. 7-1 External Grounding Point Position
Note:
The inverter complies with AS/NZS 5033. The installer does not need to perform any additional action, as this is
already set up. In the event of an earth fault, there will be a buzzer sound and a red light. The buzzer in the inverter
will keep ringing unless the fault condition is cleared.
