2 Product Description
2.1 System Introduction
The inverter is a transformerless 3-phase PV grid-connected inverter. As an integral compo
nent in the PV power system, the inverter is designed to convert the direct current power gen
erated from the PV modules into grid-compatible AC current and to feed the AC current into
the utility grid.
The intended usage of the inverter is illustrated in the following figure.
figure 2-1 Inverter Application in PV Power System
WARNING
The PV modules in the system must comply with the IEC 61730-1 (2016) class
Ⅱ
stan
dard.
When designing the system, ensure that the operating ranges of all devices that are
connected to the inverter meet the requirements of the inverter.
The inverter must not be connected to a PV string that requires positive or negative
grounding.
Do not connect any local load between the inverter and the AC circuit breaker.
NOTICE
The inverter applies only to the scenarios described in this manual.
Item Description Note
A PV strings
Monocrystalline silicon, polycrystalline silicon and thin-film with
out grounding.
B Inverter SG110CX, SG110CX-20, SG110CX-NI.
C
Grid connection
cabinet
Includes devices such as AC circuit breaker, SPD, metering de
vice.
D Transformer
Boost the low voltage from the inverter to grid-compatible medi
um voltage.
7
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