John and Reno,
Beside the six switch rule. My first concern is, if you tap the service entrance conductors and run to PV equipment. Do you need a disconnect or over current protection once it leaves the service panel?
What happens if someone cuts that wire or pipe? If it is dark and the POCO has a black out the answer would be nothing.
If the POCO blacks out during the day, the inverter will turn off. All is safe.
BUT if the PV goes down and the Poco is on, then that wire/pipe is energized.
