Conduit grounding question

[walaby]

So I've been researching for a while. In my residential setup, I need to run the PV conductors across attic and drop down to inverter. As I understand it, I need to use metal conduit. Panels are outside, and PV conductors are enclosed in PVC conduit up through soffet into attic My plan is to connect metal conduit to the Sched 80 with threaded connection, run conduit across attic and drop down to internal garage wall. I know the metal conduit can be the ground (as I've read), but since the conduit will not connect directly to service panel, but will connect to the inverter, I plan on running a separate ground conductor to establish ground for the conduit/raceway.

Is it correct to run the ground from either a junction box or bonding point to the ground lug bar on the inverter? Inverter is grounded to the service panel through a manual switch and a 50 AMP disconnect (all linked together ground wise).

Hope Im explaining my thoughts correctly. In short, I know I have to (or should?) run the PV conductors in metal conduit over the attic area. Just want to make sure Im thinking properly from the grounding perspective.

I know this is my first post here, but have been researching/reading for awhile here and other places.

EDIT: On review am I supposed to use metal conduit on outside of house as well vice the PVC to soffet?

Thanks in advance

Mike

 

[walaby]

EDIT UPDATE

So little more research and I believe I need to start the metal conduit from outside, penetrate house via soffit and run the metal conduit all the way to inverter. Will run through a DC circuit breaker box (metal). Will run separate ground from DC circuit breaker box to inverter ground lug. So, since I will ground circuit breaker box separately, do I still need to ground conduit separately? Should I use grounding rod outside near metal conduit origin and ground there?

Just trying to make sure I understand requirements. Thanks in advance for guidance and input.

Mike