SMA · Sunny Boy Inverters
Grid parameters cannot be changed. This can be due to protected parameters or insufficient DC voltage for the inverter's main processing unit.
Click steps to track your progress.
Enter the correct SMA Grid Guard code in the inverter user interface to unlock protected parameters.
Ensure there is sufficient DC start voltage available at the inverter (the green LED should be flashing, pulsing, or glowing).
Check the solar panels and connections for issues that might prevent adequate DC voltage.
Verify that the DC load-break switch is in the 'I' (on) position.