Zwy
Emperor Of Solar
Maybe you should read this: https://diysolarforum.com/threads/eg4-6500-voltage-on-pv-terminals.55201/post-707937Well the problem I still have is how the ac is getting into the panel frames. I don't think I have the issue myself but others do.
Since the dc cables and dc solar cells are isolated from the frame of the panels then grounding those frames to avoid the weird static ac buildup people are experiencing at the panels themselves makes far more sense to me than running a ground wire back to the house for it.
There is no loop circuit being completed from the house with this weird effect. I fully understand it being needed if the ac was connected to the panel frames or even the dc and it going along the dc wires since ac can piggy back like that. But there isn't supposed to be a direct connection from those dc wires to the frames.
So if its just occurring at the panels and not a loop then grounding the frames at the array makes more sense. It would be like grounding the neighbors ac back to my ground point. Sure it would work but it wouldn't make much sense.
Most inverters do not have isolation of PV to H bridge.
This isn't about whether AC voltage exists on your panel frames today. It might be there tomorrow if a fault occurs inside an inverter and sends AC output to PV. The PV array needs to be bonded to the AC grounding system for this purpose.