You still have a separate system that needs bonded to the electrical system grounding electrode (250.94) Bringing the grounding electrode conductor of the separate system to the electrical system grounding electrode system accomplishes both tasks.
O.k. just so I understand the whole picture.
After the inverter there is a main panel. At this main panel there will be an grounding electrode (required by code since its main service entrance) At this main panel the grounding electrode will be bonded to the ground bus via the GEC. We are only then required to run on ground wire EGC from the main panel to the inverter AC section. The EGC will be landed on a terminal in the inverter and this AC ground terminal will be internally connected to the DC grounding terminal (where all the DC EGC's from the array terminate)
By doing this then the one ground conductor run from the main panel to the inverter serves (2) purposes one as an EGC between the panel and the inverter, and two as a way of brining the grounding electrode of the AC system into the DC system.
Am I correct in my understanding?
Thanks for the help.