3 Product Description
SMA Solar Technology AG
14
SCCP-JP-BA-A4-en-12
User Manual
3 Product Description
3.1 PV System Overview
The Sunny Central is a PV inverter which converts the direct current generated in the PV modules into grid-compliant
alternating current. An external MV transformer fitted downstream feeds the generated alternating current into the
utility grid.
Figure 1: Principle of a grid-linked PV system with a Sunny Central
The Sunny Central is controlled via the Sunny Central Communication Controller (SC-COM). The grid management
service specifications from the grid operator can be implemented via a Power Reducer Box or the Power Plant Controller.
With the "Q at Night" order option, the Sunny Central supports the utility grid with reactive power if the input voltage is
insufficient.
3.2 Sunny Central
3.2.1 Design of the Sunny Central
Figure 2: Sunny Central (example)
Position
Designation
A
PV array
B
DC subdistribution (e.g. Sunny String-Monitor)
C
Sunny Central
D
External MV transformer, e.g. Transformer Compact Station with MV transformer
E
Utility grid
