Can Daytime PV Power Be Stored for Night Lighting?

Yes. You need to add modules such as a charge controller and batteries to the system. During the day, the system stores the electricity generated by the PV array in the batteries through the controller; at night, the controller releases the stored electricity from the batteries for lighting use. Without energy storage equipment, the system will stop working if the grid power goes out. However, if the grid-tied inverter is replaced with a smart microgrid inverter (a hybrid grid-tied and off-grid inverter), the system can still operate normally.