What to do if my SMA Sunny Island 2012 Sunny Island does not connect to the running generator?
- AAustin JosephSep 12, 2025
If the Sunny Island inverter doesn't connect to the running generator, several things could be happening. First, check the generator fuses. Second, the power allowed to be fed back into the generator during the permissible time may have been exceeded, in which case '!' appears on the display, and the generator connection is blocked for a set time. To resolve this, set the '540.02 GnAck' parameter to Ackn. Finally, if the generator control relay (GnReq) is open, the generator might have been started manually. If needed, change the setting to autostart.