SMA America, LLC
PV Inverter
Technical Description
SI5048U-TUS121440
147
Stand‑alone grid with or without generator
The "OffGrid" parameter setting automatically sets the following Sunny Boy parameters to the values
below:
This completes the stand‑alone grid parameter settings for the Sunny Boy.
17.5 Frequency Shift Power Control (FSPC)
This section describes the operating principles of the ”power adjustment via frequency” (Frequency
Shift Power Control - FSPC).
Inverter
Parameters
Setting
Sunny Boy 3000‑US
Default
BackupMode
OffGrid
Off
Sunny Boy 3800‑US
Sunny Boy 4000‑US
Sunny Boy 5000‑US
Sunny Boy 6000‑US
Sunny Boy 7000‑US
Sunny Boy 8000‑US
No.
Parameters
Short descr. Value
1
Test current
mA
Off (MSD = 0)
2
Vac.Min
V
106 (‒12% Vac nom)
3
Vac.Max
V
132 (+10% Vac nom)
4
Fac‑delta–
lower range in which the Sunny Boy is active
relative to f
0
Hz
‒3.0 (starting from the
base frequency f
0
)
5
Fac‑max+
Upper range, where the Sunny Boy is active,
based on f0
Hz
+3.0 (starting at the
base frequency f
0
)
6
dFac‑Max
max. rate of change
Hz/s
4
7
Fac‑start delta
frequency increase in relation to f0, at which
point the power adjustment via frequency begins
Hz
1 (starting from the
base frequency f
0
)
8
Fac‑Limit delta
Frequency increase based on f
0
, where the
power control via frequency ends. The output
power of the Sunny Boy at this point is 0 W.
Hz
2 (starting from the
base frequency f
0
)
