Depending on inverter SW version there are different possibilities for update of SW and associated Grid code.
The USB-RS-485-converter can be obtained be ordering 139F0165 PC to inverter cables. The software update process can take up to 50 minutes. It is important that you follow the instructions given by the inverter and in the guide. Failure to do so can result in the inverter being inoperable. If you are in doubt the update contact Service hotline for guidance or update by Service Partner.