Total variation range of charge voltage is ±0.02V/cell
Note:
1) Every batteries voltages of a battery group have a little difference at the beginning
of use, half year later they become consistent.
2) Effect by too high float voltage or too low float voltage as below :
Too high for a long time (overcharge):life shortened
Too low for a long time (not charge enough): Can not meet load or make battery
voltages inconsistent and the battery group capacity will drop accordingly and
life is shortened.