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Event numbers 1, 101, 102, 103 Grid incident
Event number 1 and the 3-digit event numbers 101, 102 and 103 indicate that the grid voltage or grid impedance at the connection point of the inverter is too high. The inverter disconnects from the utility grid to maintain power quality. As soon as the grid voltage is in the permissible range again, the inverter automatically switches itself on again after the grid monitoring time specified in the country standard.
Detailed background information about possible reasons for feed-in interruptions due to grid incidents can be found in the diagnosis Background information for grid incidents
Corrective measures for system operators:
Corrective measures for installers:
DANGER! The tasks described below may only be performed by electrically qualified persons:
See the inverter operating and installation manual for additional information about connection to the utility grid.
How to read out the grid voltage measured by the inverter and the grid voltage limit value set in the inverter via communication:
WebGui and Sunny Explorer / Sunny WebBox Bluetooth / SMA Cluster Controller after the inverter has been selected in the system tree:
Grid voltage: Spot values / AC side / Phase voltage
Set limit value U>>: Settings / Grid monitoring / Voltage monitoring / Lower maximum threshold
Sunny WebBox (485) after the inverter has been selected in the system tree:
Grid voltage value: Spot values / GridMs.PhV.phsA (B/C)
Set limit value U>>: Parameters / VolCtl.hLim
Note: The grid voltage on the inverter falls immediately after the feed-in has been interrupted (see voltage drop). It will therefore rarely be possible to read out a grid voltage above the set limit values. The difference in grid voltage before and after the feed-in interruption depends on the power that was previously fed in, the characteristics of the utility grid, and line cross-section and the transition resistances of the AC installation.
All work on the inverter and the cabling of the PV array must be carried out by an electrically qualified person. SMA accepts no liability for the information and solutions given in the Online Service Center. Additional information can be found in our Online Service Center’s terms and conditions of use.