10
3
Product Description
3.1 Product Introduction
In large and medium-sized utility power plant systems, the PV grid-connected inverter, which
contains multiple PV inverter units, transformers, and other equipment, provides a sound
solution to convert the DC power generated by PV arrays into AC power, and feed it into the
grid.
DC AC
No. Name
Description
A
PV array
Monocrystalline silicon, polycrystalline silicon, and
thin film without grounding.
B PVS
Combine the current of multiple PV strings and
output.
C
PV grid-connected
inverter
Convert the DC power from the PV arrays into AC
power.
D Transformer
Converts the low-voltage AC power output by in-
verter into medium-voltage AC power.
E Grid
-
3.2 Product Composition
SG4400UD is taken as an example to introduce main devices inside the PV grid-connected
inverter, The product consists of 4 inverter units.