If the batteries are topped and the pump is not on your concerned that the pressure tank is at less than full capacity and want to override the pressure switch and fill it using grid electricity so you will have a full pressure tank and full batteries as you head into the night.
Is this right?
If it is I don't know of any pressure switch with an override, but there may be one.
If it were me I would just install another battery to extended run time of the pump and not worry about it.
You could "override" it by turning on the water and let the pump cycle and fill the pressure tank then not use it and allow the batteries to charge after that.
The reason for the switch is because the well system is not supposed to cycle until the tank gets to a specific pressure so the pump is not starting under a load. If you were to override the switch while the tank was at say 3/4 capacity you would be shortening the life of your pump everytime you ran it.