I wanted to inquire for Solar PV, Grid-Tie type installations, the only roof penetration into the attic / plenum space is the conduit coming from the PV array combiner/junction box. A roof flashing product is installed, where the conduit is then connected. Would this be the standard industry practice?

Would the above be sufficient along with insallation of conduit all the way to the main electrical room (where the utility meter is installed), to make a facility Solar PV ready?

Thank you.