Time spent in absorption.

In addition to Rick's valuable information, it's important to remember if there are any loads present the end amps feature may be offset by whatever the load draws, generally about 2% of battery Ah capacity is the normal setting, intermittent loads such as a refrigerator cycle so do not generally cause issues, just constant ones. The Absorb timer will terminate the absorption regardless of the end amps setpoint, so the timer setting is largely governed by the arrays capacity to provide enough energy, smaller wattage array  will require more time. In addition seasonal adjustments my be required to compensate for lower output, so it's really a custom setting which must be observed over time to find the sweet spot. FWIW, my controller has a default absorption time of 180 minutes adjustable in custom settings, end amps fixed at 2% of entered battery capacity and recharge at 25v should the float value drop below that setpoint, again custom adjustable. For the most part it works fine at default values but during the rare extended cloudy periods I have, I simply extended the time to 240 minutes, as long as your PV can supply 10% of the rated Ah capacity in charging current these values may be a good starting point.