Understanding length of time for absorption & finish charge

step by step corrective eq
http://support.rollsbattery.com/support/solutions/articles/430-corrective-equalization-instructionshttp://support.rollsbattery.com/support/solutions/articles/430-corrective-equalization-instructions

step 3 - 3. Initiate the Equalization charge mode at a steady low DC current (5-10% of C/20 battery capacity). If grid power is not available, use a DC power source (generator) or PV array with sufficient current when possible.