I would also agree with this.
Just one more information which might be important if you want to read out data with the SunSpec-Profile:
The SunSpec Modbus profile for SMA devices starts at the Modbus register number 40001 and can be addressed via the Unit ID = 126 (see Section 3.4 “Addressing and Data Transmission in the Modbus Protocol”, page 11).
I will do a commissioning of a SMA Tripower soon and also want to try SunSpec. So I will keep you updated.