Charge Settings for Flooded Lead Acid Batteries

I have my cabin inverter system set up and running temporarily at my house.  It consists of a Xantrex Prosine 2kW inverter and 4 Energizer 220ah GC2 Batteries in a series/parallel connection to feed 12 VDC to the inverter.  I have some questions regarding the settings on the 100A battery charger built into the inverter.  Here are the settings that the Charger defaulted to when I selected generic flooded cell and entered 440 ah battery capacity.

Bulk Charge
Max Current 10% of battery ah capacity (Defaulted to 30%, I thought that was too high)
Max Voltage 14.4V
Absorption Charge begins after a time delay of 3 minutes at or above 13.5V

Absorption Charge
Max Current 44A 10% of battery ah capacity (Defaulted to 30%, I thought that was too high)
Max Voltage 14.4V
Max Time 8 hours.
Overcharge begins after a time delay of 3 minutes at or below 2.5% of battery ah capacity

Overcharge ( This is not explained very well in the manual other than it is the second half of the Absorption step)

Overcharge and Float also have settings but I don’t want to get too long with this message.

One question is about the 13.5V setting to begin the absorption charge seems low.  Any advice on a typical number there, on what is the overcharge part of the absorption step and any other advice from the gurus here would be appreciated.

Thank you,

Jerry