Sungrow SG125HV-30, User Manual

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1 Product Description
1.1 Intended Usage
SG125HV-30; a transformerless three-phase PV grid-connected inverter, is an
integral component in the PV power system.
The inverter is designed to convert the direct current power generated from the
PV modules into grid-compatible AC current and feeds the AC current to the
utility grid. The intended usage of the inverter is illustrated in Fig. 1-1.
Inverter cannot connect the PV strings whose positive and negative
terminals need to be grounded.
Do not connect any local load between the inverter and the AC circuit
breaker.
Inverter is applicable only to the grid-connected PV system. Any other
usage is strictly forbidden.
A
B C
D
E
F G
Fig. 1-1 Inverter application in PV power system
Item Description
A PV strings
B Batteries
C DC / DC converter (SD250HV)
D System combiner box
E Inverter (SG125HV-30)
F Transformer
G Utility grid
The following figure shows the common grid configurations.