SMA S Technical Description page 136

Sunny Boy
This function is shown in the following figure:
The data in the above figure have the following meanings:
• f refers to the base frequency of the stand-alone grid (50 Hz in this example).
0
• Fac-delta– and Fac-delta+ refer to the maximum range in which the Sunny Boy is active relative
to f .
0
• Fac-start delta refers to the frequency increase relative to f
adjustment via frequency begins.
• Fac-Limit delta refers to the frequency increase relative to f
adjustment via frequency ends. The power of the Sunny Boy is 0 W in this example.
If the value is below the Fac-delta– limit or exceeds the Fac-delta+ limit, the Sunny Boys disconnect
from the backup system.
Frequency shutdown of the Sunny Boys
The Sunny Backup 2200 temporarily increases the frequency if it is going to be
synchronized to the public grid and the current battery voltage (V
battery voltage (V
The Sunny Backup 2200 disconnects the Sunny Boys using this frequency shutdown
method (overfrequency) and then synchronizes itself with the external source.
The Sunny Boys automatically switch back on once the grid frequency returns to within the
limit values.
136 SBU2200-TEN083320
Operation
).
Bat nom
SMA Solar Technology AG
, at which point the power
0
, at which point the power
0
) exceeds the nominal
Bat
Technical Description