SMA Sunny Island 5048 - Grid Failure

SMA Solar Technology AG Connecting External Sources
Technical Description SI5048-TB-TEN110340 125
Feeding Operation
Whether energy is fed from the stand-alone grid system into the power distribution grid is controlled
using the "232.08 GdMod" parameter.
In all cases, make sure to consult your network operator if grid feed-in is possible.
If GridCharge (Default) is set, no energy is fed into the grid. If GridFeed is set, energy is fed into the
grid.
AC feed-in generators on the stand-alone grid side (Sunny Boy) can feed their energy into the grid
through the internal transfer relay of the Sunny Island; for limitations, see section 14.1.6”Limits and
Power Adjustment” (page118).
14.2.6 Grid Failure
A grid failure is characterized by the voltage or frequency being outside of the permissible limits (see
section 14.2.4”Grid Reconnection” (page124)) or the power distribution grid being disconnected.
In this case, the time limits are relevant: Smaller deviations are permitted for longer than large
deviations (see section 14.2.1”Voltage and Frequency Limits” (page123)).
In case of a grid fault/failure, the power distribution grid is disconnected and the inverter starts, from
silent mode.
Feeding into the grid on the DC side
In order to allow electricity to be fed from the DC side into the grid, the battery voltage in
a charged battery (on the grid) must be increased by external DC chargers or the
Sunny Island Charger above the nominal charging voltage.
Waking up from the silent mode
If the Sunny Island is in silent mode when there is a power distribution grid failure, there is
a short grid failure in the stand-alone grid (see section 13.4.5”Silent Mode” (page103)).