Electrical Connection SMA Solar Technology AG
54 SMC9-11TLRP-IEN100640 Installation Guide
5.9.6 Limited Dynamic Grid Support
From firmware version 2.00/2.00, the Sunny Mini Central units with Reactive Power Control feature
the function for limited the dynamic grid support. Using this function, the inverter can begin feeding
again immediately following the end of a short-term interruption to the voltage. The inverter also
disconnects from the mains through the internal decoupling protection with the set country parameter
and/or through the external three-phase decoupling protection.
This function has 4 adjustable parameters.
Default settings
In the table below, default settings are marked with *.
Parameters Description Unit Value range
DGS-PWMVolNom Cut-off voltage in percent relative to
VRef + VRefOfs. When the AC
voltage drops below the value set
here, the inverter will stop feeding.
% 40 ... 100
70*
DGS-HystVolNom Hysteresis in percent. When the AC
voltage exceeds the value set, the
inverter starts feeding again.
% 0 ... 60
5*
VRef Phase voltage at the output side of
the transformer.
V 215 ... 245
230*
VRefOfs Adjustable voltage offset
(e.g. through output losses).
V –20 ... +20
0*