I just had a 10 Kw grid tied solar PV system installed on our house in SE Pa. It's located on the upper roof on a normal 2 story home. The installer put in a heavy duty ground cable (not sure AWG) that connects to each panel and all the mounting rails with approved grounding connectors. This ground wire and all the DC wires (six strings) were pulled through metal conduit down to the basement. That ground ties to all the disconnects and the two inverters in the basement and then is tied into the main electrical panel ground. It all looks well done and was blessed by the electrical inspector.
Questions: Is there a high risk of lighting strike damage to the system? Is there some additional grounding or other devices that will mitigate this? What are others usually doing? Are arrestors needed on the DC and AC lines adjacent to the inverters? Perhaps what I have now is perfectly fine...
I am looking for some common sense on this topic that will help me understand what I am up against and if it's prudent to pursue adding some addional protection.
Thanks for any and all coments.
Chris