SMA SUNNY ISLAND 6048-US - Grid Failure

14 Connecting External Sources SMA America, LLC
134 SI4548_6048-US-TB_en-13 Technical description
The following illustration shows the direction of energy flow for the "Net Metering" and the energy
consumption from the utility grid.
14.2.7 Grid Failure
A grid failure is characterized by the voltage or frequency being outside of the permissible limits
(see Section 14.2.5 "Grid Reconnection", page 131) or the utility 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 "Limits of the Voltage Range and Frequency Range", page 130).
In case of a grid fault/failure, the utility grid is disconnected and the inverter starts from silent mode.
Waking up from the silent mode
If the Sunny Island is in silent mode when there is a utility grid failure, there is a short grid failure
in the stand-alone grid (see Section 13.4.5 "Silent Mode", page 113).