SMA SMC 5000 Installation - Manual (Page 22)

Requirements for the Installation SMA Technologie AG
Page 22 SMC50_60-11:SE2006 Installation Guide
Grid Impedance
In the following example the output power (Uac) is reduced to 260 V. You are also
able to reduce the output power of the Sunny Mini Central 5000/6000 according to
the national standards.
Because of a high grid impedance the Sunny Mini Central 5000/6000 can receive
a high AC voltage at the connection point. The output voltage (Uac) of the Sunny
Mini Central 5000/6000 is limited to 260 V. If the Sunny Mini Central 5000/6000
exceeds 260 V, it stops feeding to the grid immediately and indicates a „grid fail-
ure“.
Which power you can feed into the grid, without stopping operation because of high
AC voltages, is shown in the diagram below.
To estimate how many Sunny Mini Central 5000/6000 can operate on one phase
you need the following values:
• Grid voltage without feeding
• Grid impedance at the connection point of the Sunny Mini Central 5000/6000
The diagram shows the respective curve for the AC voltage without feeding. The re-
spective curve for power per phase (X axis) results in subject to the grid impedance
(Y axis).
Grid Impedance [Ohm]
Power [kW] per Phase
0 5 10 15 20 25 30
0,5
0,6
0,7
0,8
0,9
1,0
1,1
1,2
1,3
1,4
1,5
250 V 240 V 230 V 220 V 210 V 200 V