30w Solar Panel

How long does it take for a 60W Solar Panel to charge a 60amp-hour 12 V battery?
Say my battery is at 50% depth of discharge, and I am only getting 30W out of the panel.
60 a-hr * 12 v / 60 w = 12 hr of full sunshine

How long does it take for a 60W Solar Panel to charge a 60amp-hour 12 V battery?
Say my battery is at 50% depth of discharge, and I am only getting 30W out of the panel.
60 a-hr * 12 v / 60 w = 12 hr of full sunshine