[RE-wrenches] Are PV Systems are considered separately derived systems?

[Ryan J LeBlanc]

What's the best answer when someone asks if PV Systems are considered
separately derived systems?

It still seems to be up to whoever is doing the considering (AHJ), and I
don't like that answer.

I believe the answer is yes they are.  And 690.47 tells us how to ground
them.  

"(C) Systems with Alternating-Current and Direct-Current Grounding
Requirements. Photovoltaic systems having dc circuits and ac circuits with
no direct connection between the dc grounded conductor and ac grounded
conductor shall have a dc grounding system. The dc grounding system shall be
bonded to the ac grounding system by one of the methods in (1), (2), or
(3)." 

Any help is appreciated

~Ryan