The ends of the conduit should be clearly labeled particularly if the intent is to install the pv system at a later date.
Conduit for solar panels.
Battery inverter interconnect roof c box to charge controller roof solar panel communication inverter input conduit.
In a solar power system without conduit your outdoor wires could get wet.
Cables conduit adapters.
A conduit is intended to protect the wiring leading from the pv array to the inverter and from the inverter to the electrical service panel.